AU2013273650B2

AU2013273650B2 - Gene capable of improving material productivity in seed and method for use thereof

Info

Publication number: AU2013273650B2
Application number: AU2013273650A
Authority: AU
Inventors: Satoshi Kondo; Kyoko Matsui; Norihiro Mitsukawa; Nobuhiko Muramoto; Chikara Ohto; Masaru Takagi
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
Priority date: 2009-06-04
Filing date: 2013-12-18
Publication date: 2015-09-17
Anticipated expiration: 2030-06-04
Also published as: AU2013273650A1; AU2013273648B2; AU2013273648A1

Abstract

The present invention relates to a gene having a novel function that can cause an increase or decrease in material productivity, and particularly, fat and oil content. In the present invention, a chimeric protein obtained by fusing a transcription factor consisting of a protein comprising an amino acid sequence shown in any of the even-numbered SEQ ID NOS: 1 to 158 and a functional peptide capable of converting an arbitrary transcription factor into a transcriptional repressor is expressed in a plant.

Description

- 1 DESCRIPTION Title of Invention: GENE CAPABLE OF IMPROVING MATERIAL PRODUCTIVITY IN SEED AND METHOD FOR USE THEREOF 5 The present application is a divisional application of Australian Application No. 2010254917, which is incorporated in its entirety herein by reference. Technical Field Background Art Any discussion of the prior art throughout the specification should in no way be 10 considered as an admission that such prior art is widely known or forms part of common general knowledge in the field. [0001] Plants are cultivated for the purpose of using some tissues thereof (e.g., seeds, roots, leaves, or stems) or for the purpose of producing various substances (materials), such as fats and oils. Examples of fats and oils produced from plants that have been 15 heretofore known include soybean oil, sesame oil, olive oil, coconut oil, rice oil, cottonseed oil, sunflower oil, corn oil, safflower oil, palm oil, and rapeseed oil. Such fats and oils are extensively used for household and industrial applications. Also, fats and oils produced from plants are used as raw materials for biodiesel fuel or bioplastic, and the applicability thereof is increasing for alternative energy to petroleum. 20 [0002] Under such circumstances, it is necessary to improve productivity per unit area of cultivated acreage in order to succeed in the industrial production of fats and oils using plants. Here, assuming that the number of cultivated plant individuals per unit area of cultivated acreage is stable, it can be understood that the fat and oil production per plant individual needs to be improved. When fats and oils are collected from seeds 25 obtained from plants, it is expected that the fat and oil production per plant individual can be improved by techniques for improving the seed yield per plant individual, techniques for improving the fat and oil content in seeds, and similar techniques. [0003] Techniques for improving the fat and oil production in plant seeds are roughly -2 divided into the improvement of cultivation and the development of varieties with increased fat and oil productivity. Methods for developing varieties with increased fat and oil productivity are roughly divided into conventional breeding methods mainly involving crossing technology and molecular breeding methods comprising gene 5 recombination. The following are known techniques for increasing fat and oil productivity via gene recombination: (A): a technique for modifying a system for synthesizing triacylglycerol (TAG) contained in seeds as a main component of plant fat and oil; and (B): a technique for modifying various regulatory genes that regulate plant morphogenesis or metabolism and expression of genes involved plant morphogenesis or 10 metabolism. [0004] Regarding technique (A), the following methods can be used as a method for increasing the amount of TAG syntheseized using, as a starting material, a sugar produced via photosynthesis: (1): a method for increasing activity of synthesizing fatty acid or glycerol that is a constitutive component of TAG from a sugar; (2): a method for 15 enhancing a reaction of synthesizing TAG from glycerol and fatty acid. In relation to the above technique, the following have been reported as gene engineering techniques. In one example of method (1), the fat and oil content in seeds was reportedly improved by 5% by causing Arabidopsis thaliana cytoplasm acetyl-coenzyme A carboxylase (ACCase) to be overexpressed in rapeseed plastids (Non-Patent Document 1). In one 20 example of (2), a technique for increasing fat and oil productivity by causing overexpression of DGAT (diacylglycerol acyltransferase) capable of transfering an acyl group at the sn-3 position of diacylglycerol (Non-Patent Document 2) was reportedly developed. Regarding the technique of Non-Patent Document 2, fat and oil content and seed weight were reported to have increased with an increase in DGAT expression level, 25 which might cause an increase in the number of seeds per plant individual. By the use of this method, the fat and oil content in seeds of Arabidopsis thaliana was found to have increased by 46%, and the fat and oil amount per plant individual was found to have increased by up to approximately 125%. [0005] Meanwhile, one possible example of technique (B) is a method for regulating the 30 expression of a transcription factor gene involved in the regulation of expression of a biosynthetic enzyme gene. Patent Document 1 discloses such method. According to the technique used in Patent Document 1, a recombinant plant in which a transcription factor -3 is exhaustively overexpressed or knocked out is prepared, followed by selection of a gene that causes an increase in the fat and oil content in seeds. Patent Document 1 describes that the fat and oil content in seeds was found to have increased by 23% as a result of overexpression of the ERF subfamily B-4 transcription factor gene. However, 5 Patent Document 1 does not describe an increase or decrease in the fat and oil content per plant individual. Non-Patent Document 3 describes that the fat and oil content in seeds can be improved by causing the overexpression of WRINKLED1, which is a transcription factor having an AP2/EREB domain. [0006] Meanwhile, when a hydrocarbon component such as cellulose contained in a 10 plant is glycosylated and then alcohol is produced via fermentation, it can be predicted that fat and oil components contained in a plant become impurities and thus cause reduction of glycosylation efficiency in the glycosylation step. Therefore, if the fat and oil content can be reduced, the glycosylation efficiency in the glycosylation step can be improved. As a result, improvement of alcohol productivity can be expected. For 15 example, Non-Patent Document 3 discloses that seeds of a WRIl/ASML1 (AP2 family transcription factor; AGI-code:AT3g54320)-deficient strain become wrinkled, resulting in reduction of the fat and oil content. In addition, Patent Document 2 discloses that overexpression of AT3g23250 (MYB15) resulted in a 13% decrease in the fat and oil content in seeds, overexpression of AT1g04550 (IAA12) resulted in a 12% decrease in 20 the same, and overexpression of AT1g66390 (MYB90) resulted in a 16% decrease in the same. [0007] In spite of the development of the above molecular breeding methods for the improvement of a variety of traits, there are still no practically available techniques to increase or decrease fat and oil productivity. 25 [0008] As reasons for the above, it is considered that truly excellent genes remain undiscovered, and that new recombinant varieties that have been confirmed to have desirable effects in the test phase cannot exhibit expected effects upon practical use in differerent natural environments. In addition, a number of genes are involved in the expression of quantitative traits such as productivity of a desired material in different 30 steps in the regulation system, the metabolizing system, and other systems. Thus, it has been difficult to discover or develop truly excellent and useful genes capable of -4 improving quantitative traits. Accordingly, the present invention relates to a novel gene exhibiting remarkably high effects. The present invention also relates to developing a gene capable of exerting effects in a practical environment to an extent comparable to the effects generated in the test phase. 5 Citation List Patent Literature [0009] Patent Document 1: WO01/36597 Patent Document 2: WOO1/35727 10 Non-Patent Literature [0010] Non-Patent Document 1: Plant Physiology (1997) Vol. 11, pp. 75-81 Non-Patent Document 2: Plant Physiology (2001), Vol. 126, pp. 861-874 Non-Patent Document 3: Plant J. (2004) 40, 575-585 15 Summary of Invention Technical Problem [0011] In view of the above circumstances, it is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative. 20 Solution to Problem [0012] As a result of intensive studies, the present inventors found that it is possible to improve various quantitative traits and particularly to increase or decrease material productivity via induction of expression of a chimeric protein obtained by fusing a particular transcription factor and a functional peptide capable of converting an arbitrary 25 transcription factor into a transcriptional repressor (hereinafter sometimes referred to as a "repressor domain"). This has led to the completion of the present invention. [0012a] Accordingly, in a first aspect of the present invention, there is provided a method for improving productivity of fats and oils in seed by causing expression of a -5 chimeric protein obtained by fusing a transcription factor consisting of any one of the following proteins (a) to (c) and a functional peptide capable of converting an arbitrary transcription factor into a transcriptional repressor in a plant: (a) a protein comprising an amino acid listed in the following table; AGI code Nucleotide sequence Amino sequence At1g80580 SEQ ID NO: 5 SEQ ID NO: 6 5 (b) a protein having transactivation activity and comprising an amino acid sequence that has a deletion, a substitution, an addition, or an insertion of one or a plurality of amino acids with respect to the amino acid sequence listed in the above table; and (c) a protein having transactivation activity encoded by a polynucleotide that 10 hybridizes under stringent conditions to a polynucleotide consisting of a nucleotide sequence complementary to the nucleotide sequence listed in the above table. [0012b] Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an 15 inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to". [0013] The plant of the present invention is obtained by inducing expression of a chimeric protein obtained by fusing a transcription factor consisting of any one of the following proteins (a) to (c) and a functional peptide capable of converting an arbitrary 20 transcription factor into a transcriptional repressor. [0014] (a) A protein comprising an amino acid sequence shown in any of the even-numbered SEQ ID NOS: 1 to 158 (b) A protein having transactivation activity and comprising an amino acid sequence that 25 has a deletion, a substitution, an addition, or an insertion of one or a plurality of amino acids with respect to an amino acid sequence shown in any of the even-numbered SEQ ID NOS: 1 to 158.

- 5a (c) A protein having transactivation activity encoded by a polynucleotide that hybridizes under stringent conditions to a polynucleotide consisting of a nucleotide sequence complementary to a nucleotide sequence shown in any of the odd-numbered SEQ ID NOS: 1 to 158. 5 [0015] Preferably, the fusion of a functional peptide with a predetermined transcription factor causes repression of transcriptional regulatory activity, and particularly, transactivation activity, of the transcription factor in the plant of the present invention. Examples of the above functional peptide used herein include peptides expressed by the following formulae (1) to (8). 10 (1) X1-Leu-Asp-Leu-X2-Leu-X3 (where X1 denotes a set of 0 to 10 amino acid residues, X2 denotes Asn or Glu, and X3 denotes a set of at least 6 amino acid residues.) 15 20 25 -6 (2) Y1-Phe-Asp-Leu-Asn-Y2-Y3 (where Y1 denotes a set of 0 to 10 amino acid residues, Y2 denotes Phe or Ile, and Y3 denotes a set of at least 6 amino acid residues.) (3) Z1-Asp-Leu-Z2-Leu-Arg-Leu-Z3 5 (where Z1 denotes Leu, Asp-Leu, or Leu-Asp-Leu, Z2 denotes Glu, Gln, or Asp, and Z3 denotes a set of 0 to 10 amino acid residues.) (4) Asp-Leu-Z4-Leu-Arg-Leu (where Z4 denotes Glu, Gln, or Asp.) (5) al-Leu- 1-Leu-yl-Leu 10 (6) al-Leu-1-Leu-y2-Leu (7) al-Leu-2-Leu-Arg-Leu (8) a2-Leu- 1-Leu-Arg-Leu (where al denotes Asp, Asn, Glu, Gln, Thr, or Ser, a2 denotes Asn, Glu, Gln, Thr, or Ser, p1 denotes Asp, Gln, Asn, Arg, Glu, Thr, Ser, or His, 02 denotes Asn, Arg, Thr, 15 Ser, or His, yl denotes Arg, Gln, Asn, Thr, Ser, His, Lys, or Asp, and y2 denotes Gln, Asn, Thr, Ser, His, Lys, or Asp in formulae (5) to (8).) In addition, the plant of the present invention is characeterized by significant improvement or reduction of material productivity per plant individual and particularly productivity of fat and oil contained in seeds. A specific tissue used in the present 20 invention can be seed tissue. Here, the expression "significant improvement or reduction" indicates that the plant of the present invention allows an increase or decrease in the material productivity associated with a statistically significant difference when compared in terms of material productivity with a plant in which the above chimeric protein is not expressed. 25 [0016] Meanwhile, according to the present invention, the above chimeric protein, the gene encoding the chimeric protein, an expression vector comprising the gene, and a -7 transformant comprising the gene can be provided. [0017] This description includes part or all of the contents as disclosed in the description and/or drawings of Japanese Patent Application No. 2009-135321, which is a priority document of the present application. 5 Advantageous Effects of Invention [0018] The material productivity per plant individual (and particularly the fat and oil content in seeds) is improved or reduced in the plant of the present invention. Therefore, the use of the plant of the present invention enables improvement of productivity of plant-derived fats and oils. Alternatively, for example, bioalcohol or the like can be 10 produced with good efficiency using the plant of the present invention in which fats and oils contained as impurities can be reduced. Description of Embodiments [0019] The present invention will be described in detail as follows. [0020] The plant of the present invention is a plant in which a chimeric protein obtained 15 by fusing a predetermined transcription factor and a functional peptide capable of converting an arbitrary transcription factor into a transcriptional repressor is expressed. The plant of the present invention is found to exhibit significant improvement or reduction of the material productivity per plant individual (and particularly the fat and oil content in seeds) when compared with a wild-type plant. Specifically, the plant of 20 the present invention is produced by causing a transcription factor to be expressed in the form of a chimeric protein with the functional peptide in a desired plant so as to significantly improve or reduce the material productivity of the desired plant. [0021] In particular, preferably, the transactivation activity of a transcription factor is repressed in the plant of the present invention by fusing the factor with the above 25 functional peptide. In other words, when a chimeric protein obtained by fusing a transcription factor with the functional peptide is expressed in the plant of the present invention, this preferably results in expression of transcription repression effects originally imparted to the functional peptide as a dominant trait.

-8 [0022] Here, the term "material productivity per plant individual" refers to the content of an individual substance (material) produced per unit volume of a plant. Such substance is not particularly limited. It may be a substance originally produced by a plant. Alternatively, it may be a substance that is not originally produced in a plant but can be 5 produced in the plant via genetic engineering or the like. [0023] In particular, if the content of a desired product per tissue increases, purification cost or transport cost can be reduced. Thus, such plant is highly industrially applicable. A particularly desired product may be lignocellulose, which accounts for the substantially total weight of a plant. It may be a plant oil industrially available as a seed 10 oil. A plant oil may be composed of simple lipid in the form of ester of fatty acid and alcohol or of complex lipid containing phosphorus, sugar, nitrogen, and other components. It may be fatty acid itself. Examples of alcohol that can be used for simple lipid include higher alcohol with a large molecular weight and polyalcohol such as glycerol (glycerine). Examples of fatty acid that can be used for simple lipid include 15 saturated fatty acid, unsaturated fatty acid, and specialty fatty acid containing a hydroxyl group or an epoxy group. Examples of simple lipid that can be used in the form of ester of glycerol and fatty acid include monoacylglycerol, diacylglycerol, and triacylglycerol. [0024] Meanwhile, certain substances contained in plants becomes impurities depending on the use of the plants. Therefore, if productivity of such a certain substance in a plant 20 decreases, the impurity content decreases. Such plant is highly industrially applicable. For example, in the case of glycosylation of lignocellulose contained in a plant, fat and oil components contained in the plant might become impurities and thus negatively influence glycosylation efficiency. Therefore, if the fat and oil productivity decreases, the efficiency of the glycosylation step in the process of producing bioalcohol or the like 25 using a plant can be improved. [0025] Fats and oils are described below as examples of target substances for productivity improvement or reduction. However, the technical scope of the present invention is not limited thereto. The present invention can be applied to substances other than fat and oil that are produced by plants. 30 [0026] Plants used herein are not particularly limited, and thus any plant can be used as a target plant. Particularly preferably, a plant conventioinally used for production of fat -9 and oil is used. Examples of an available target plant include soybean, sesame, olive oil, coconut, rice, cotton, sunflower, corn, sugarcane, Jatropha, palm, tobacco, safflower, and rapeseed. Also, Arabidopsis thaliana, which has been widely used as an biological model for plant gene analysis and for which gene expression analysis methods have been 5 established, can be used as a target plant. [0027] In addition, transcription repression activity of a chimeric protein comprising a transcription factor is activity of recognizing a cis sequence that is recognized by the transcription factor or a cis sequence of a different transcription factor that is analogous to such a cis sequence so as to actively repress the expression of downstream genes. 10 Thus, such chimeric protein can also be called a "transcriptional repressor." A method for causing a chimeric protein comprising a transcription factor to have transcription repression activity is not particularly limited. However, in particular, the most preferable method may be a method for constructing a chimeric protein (fusion protein) by adding a repressor domain sequence or an SRDX sequence thereto. 15 [0028] In the above method, as a repressor domain sequence, a variety of amino acid sequences discovered by the present inventors, each of which constitutes a peptide capable of converting an arbitrary transcription factor into a transcriptional repressor, can be used. For example, the following can be referred to for a method using a repressor domain sequence: JP Patent Publication (Kokai) No. 2001-269177 A; JP 20 Patent Publication (Kokai) No. 2001-269178 A; JP Patent Publication (Kokai) No. 2001 292776 A; JP Patent Publication (Kokai) No. 2001-292777 A; JP Patent Publication (Kokai) No. 2001-269176 A; JP Patent Publication (Kokai) No. 2001-269179 A; W003/055903; Ohta, M., Matsui, K., Hiratsu, K., Shinshi, H. and Ohme-Takagi, M., The Plant Cell, Vol. 13, 1959-1968, August, 2001; and Hiratsu, K., Ohta, M., Matsui, 25 K., or Ohme-Takagi, M., FEBS Letters 514(2002) 351-354. A repressor domain sequence can be excised from a Class II ERF (Ethylene Responsive Element Binding Factor) protein or a plant zinc finger protein (zinc finger protein such as Arabidopsis thaliana SUPERMAN protein). The sequence has a very simple structure. [0029] Examples of a transcription factor constituting a chimeric protein to be expressed 30 include transcription factors specified by AGI codes for Arabidopsis thaliana listed in tables 1 and 2. In addition, any transcription factor listed in table 1 causes a significant -10 increase in fat and oil content in seeds when a chimeric protein comprising the transcription factor and a repressor domain is expressed in a plant. Meanwhile, any transcription factor listed in table 2 causes a significant decrease in fat and oil content in seeds when a chimeric protein comprising the transcription factor and a repressor 5 domain is expressed in a plant. [Table 1] AGI code Nucleotide sequenc Amino acid sequence At5g47230 SEQ ID NO: 1 SEQ ID NO: 2 At1g22985 SEQ ID NO: 3 SEQ ID NO: 4 At1g80580 SEQ ID NO: 5 SEQ ID NO: 6 At1g25470 SEQ ID NO: 7 SEQ ID NO: 8 Atlg67260 SEQ ID NO: 9 SEQ ID NO: 10 At4g36160 SEQ ID NO: 11 SEQ ID NO: 12 At5g64750 SEQ ID NO: 13 SEQ ID NO: 14 At4g01550 SEQ ID NO: 15 SEQ ID NO: 16 At1g24260 SEQ ID NO: 17 SEQ ID NO: 18 At5g09330 SEQ ID NO: 19 SEQ ID NO: 20 At2g31230 SEQ ID NO: 21 SEQ ID NO: 22 [Table 2] AGI code Nucleotide sequence Amino acid sequence AGI code Nucleotide sequence Amino acid sequence At2g30470 SEQ ID NO: 23 SEQ ID NO: 24 At1g33760 SEQ ID NO: 91 SEQ ID NO: 92 At2g17040 SEQ ID NO: 25 SEQ ID NO: 26 At3g27920 SEQ ID NO: 93 SEQ ID NO: 94 At5g07690 SEQ ID NO: 27 SEQ ID NO: 28 At3g18550 SEQ ID NO: 95 SEQ ID NO: 96 At3g15500 SEQ ID NO: 29 SEQ ID NO: 30 At1g52880 SEQ ID NO: 97 SEQ ID NO: 98 At2g30420 SEQ ID NO: 31 SEQ ID NO: 32 At5g07310 SEQ ID NO: 99 SEQ ID NO: 100 At3g09600 SEQ ID NO: 33 SEQ ID NO: 34 At4g26150 SEQ ID NO: 101 SEQ ID NO: 102 At1g36060 SEQ ID NO: 35 SEQ ID NO: 36 At1g19490 SEQ ID NO: 103 SEQ ID NO: 104 At1g01250 SEQ ID NO: 37 SEQ ID NO: 38 At1g52150 SEQ ID NO: 105 SEQ ID NO: 106 At1g25580 SEQ ID NO: 39 SEQ ID NO: 40 At3g04060 SEQ ID NO: 107 SEQ ID NO: 108 At3g20770 SEQ ID NO: 41 SEQ ID NO: 42 At4g32800 SEQ ID NO: 109 SEQ ID NO: 110 At1g12890 SEQ ID NO: 43 SEQ ID NO: 44 At5g66300 SEQ ID NO: 111 SEQ ID NO: 112 At2g18060 SEQ ID NO: 45 SEQ ID NO: 46 At5g13180 SEQ ID NO: 113 SEQ ID NO: 114 At4g18390 SEQ ID NO: 47 SEQ ID NO: 48 At1g71692 SEQ ID NO: 115 SEQ ID NO: 116 At5g08070 SEQ ID NO: 49 SEQ ID NO: 50 At1g27730 SEQ ID NO: 117 SEQ ID NO: 118 At1g76580 SEQ ID NO: 51 SEQ ID NO: 52 At3g49850 SEQ ID NO: 119 SEQ ID NO: 120 At4g28140 SEQ ID NO: 53 SEQ ID NO: 54 At3g02150 SEQ ID NO: 121 SEQ ID NO: 122 At5g60970 SEQ ID NO: 55 SEQ ID NO: 56 At5g47220 SEQ ID NO: 123 SEQ ID NO: 124 At2g42830 SEQ ID NO: 57 SEQ ID NO: 58 At5g43270 SEQ ID NO: 125 SEQ ID NO: 126 Atlg3O21O SEQ ID NO: 59 SEQ ID NO: 60 At5g52020 SEQ ID NO: 127 SEQ ID NO: 128 At1g71450 SEQ ID NO: 61 SEQ ID NO: 62 At1g69490 SEQ ID NO: 129 SEQ ID NO: 130 At1g09540 SEQ ID NO: 63 SEQ ID NO: 64 At4g38620 SEQ ID NO: 131 SEQ ID NO: 132 At3g10490 SEQ ID NO: 65 SEQ ID NO: 66 At2g45650 SEQ ID NO: 133 SEQ ID NO: 134 At1g62700 SEQ ID NO: 67 SEQ ID NO: 68 At5g02460 SEQ ID NO: 135 SEQ ID NO: 136 At1g49120 SEQ ID NO: 69 SEQ ID NO: 70 At1g12260 SEQ ID NO: 137 SEQ ID NO: 138 At1g44830 SEQ ID NO: 71 SEQ ID NO: 72 At5g13330 SEQ ID NO: 139 SEQ ID NO: 140 Atlg3O81O SEQ ID NO: 73 SEQ ID NO: 74 At4gO1O6O SEQ ID NO: 141 SEQ ID NO: 142 At1g74840 SEQ ID NO: 75 SEQ ID NO: 76 At2g46590 SEQ ID NO: 143 SEQ ID NO: 144 At5g18830 SEQ ID NO: 77 SEQ ID NO: 78 At1g69120 SEQ ID NO: 145 SEQ ID NO: 146 At1g72360 SEQ ID NO: 79 SEQ ID NO: 80 At1g77450 SEQ ID NO: 147 SEQ ID NO: 148 At1g32770 SEQ ID NO: 81 SEQ ID NO: 82 At2g23760 SEQ ID NO: 149 SEQ ID NO: 150 At5g14000 SEQ ID NO: 83 SEQ ID NO: 84 At2g02070 SEQ ID NO: 151 SEQ ID NO: 152 At2g23290 SEQ ID NO: 85 SEQ ID NO: 86 At1g22640 SEQ ID NO: 153 SEQ ID NO: 154 At2g02450 SEQ ID NO: 87 SEQ ID NO: 88 At5g22380 SEQ ID NO: 155 SEQ ID NO: 156 At1g27360 SEQ ID NO: 89 SEQ ID NO: 90 At5g62380 SEQ ID NO: 157 SEQ ID NO: 158 -12 [0030] In addition, examples of a transcription factor constituting a chimeric protein are not limited to amino acid sequences (shown in the even-numbered SEQ ID NOS: 1 to 158) listed in tables 1 and 2. Also, it is possible to use a transcription factor having transactivation activity and comprising an amino acid sequence that has a deletion, a 5 substitution, an addition, or an insertion of one or a plurality of amino acid sequences with respect to any of the amino acid sequences. Here, the term "a plurality of amino acids" refers to 1 to 20, preferably 1 to 10, more preferably 1 to 7, further preferably 1 to 5, and particularly preferably 1 to 3 amino acids, for example. In addition, amino acid deletion, substitution, or addition can be performed by modifying a nucleotide sequence 10 encoding any of the above transcription factors by a technique known in the art. Mutation can be introduced into a nucleotide sequence by a known technique such as the Kunkel method or the Gapped duplex method or a method based thereon. For example, mutation is introduced with a mutagenesis kit using site-directed mutagenesis (e.g., Mutant-K or Mutant-G (both are trade names of Takara Bio)) or the like, or a LA PCR in 15 vitro Mutagenesis series kit (trade name, Takara Bio). Also, a mutagenesis method may be: a method using a chemical mutation agent represented by EMS (ethyl methanesulfonate), 5-bromouracil, 2-aminopurine, hydroxylamine, N-methyl-N'-nitro-N nitrosoguanidine, or other carcinogenic compounds; or a method that involves radiation treatment or ultraviolet [UV] treatment typically using X-rays, alpha rays, beta rays, 20 gamma rays, an ion beam, or the like. [0031] Further, examples of a transcription factor constituting a chimeric protein are not limited to Arabidopsis thaliana transcription factors listed in tables 1 and 2. Examples of such transcription factor can include transcription factors that function in a similar manner in non-Arabidopsis thaliana plants (e.g., the aforementioned plants) (hereinafter 25 referred to as homologous transcription factors). These homologous transcription factors can be searched for using the genomic information of a search target plant based on amino acid sequences listed in tables 1 and 2 or the nucleotide sequences of individual genes if the plant genomic information has been elucidated. Homologous transcription factors can be identified by searching for amino acid sequences having, for 30 example, 70% or higer, preferably 80% or higher, more preferably 90% or higher, and most preferably 95% or higher homology to the amino acid sequences listed in tables 1 and 2. Here, the value of homology refers to a value that can be found based on default setting using a computer equipped with a BLAST algorithm and a database containing -13 gene sequence information. [0032] In addition, a homologous gene can be identified by, when the plant genome information remains unclarified, extracting the genome from a target plant or constructing a cDNA library for a target plant and then isolating a genomic region or 5 cDNA hybridizing under stringent conditions to at least a portion of the gene encoding any one of the transcription factors listed in tables 1 and 2. Here, the term "stringent conditions" refers to conditions under which namely a specific hybrid is formed, but a non-specific hybrid is never formed. For example, such conditions comprise hybridization at 45 0 C with 6 x SSC (sodium chloride/sodium citrate), followed by 10 washing at 50'C to 65 0 C with 0.2-1 x SSC and 0.1% SDS. Alternatively, such conditions comprise hybridization at 65 0 C to 70'C with 1 x SSC, followed by washing at 65 0 C to 70'C with 0.3 x SSC. Hybridization can be performed by a conventionally known method such as a method described in J. Sambrook et al. Molecular Cloning, A Laboratory Manual, 2nd Ed., Cold Spring Harbor Laboratory (1989). 15 [0033] A feature of causing the fat and oil production in seeds to vary significantly (to be improved or reduced significantly) is imparted to the plant of the present invention by causing expression of the aforementioned chimeric protein comprising a transcription factor and a functional peptide in a plant. In particular, a feature of causing the fat and oil production in seeds to vary significantly (to be improved or reduced significantly) is 20 imparted to the plant of the present invention by causing expression of a chimeric protein comprising a transcription factor of interest having repressed transactivation activity, further causing expression of transcription repression activity through recognition of a cis sequence homologous to a cis sequence recognized by the transcription factor of interest, or altering the specific affinity of the transcription factor 25 of interest to that of another factor, nucleic acid, lipid, or carbohydrate. In the plant of the present invention, it is possible to create a chimeric protein by modifying an endogenous transcription factor. Alternatively, it is also possible to introduce a gene encoding a chimeric protein into the plant so as to cause the gene to be expressed therein. 30 [0034] For instance, it is preferable to use a method wherein a gene encoding a chimeric protein (fusion protein) obtained by fusing the aforementioned transcription factor and a -14 functional peptide capable of converting an arbitrary transcription factor into a transcriptional repressor is introduced into a target plant to cause the chimeric protein (fusion protein) to be expressed in the plant. [0035] The expression "transcription factor having repressed transactivation activity" 5 used herein is not particularly limited. Such transcription factor has significantly lower transactivation activity than the original transcription factor. In addition, a "functional peptide capable of converting an arbitrary transcription factor into a transcriptional repressor" (sometimes referred to as a "transcription repressor converting peptide") is defined as a peptide having the function of causing an arbitrary transcription factor to 10 have significantly lower transactivation activity than the original transcription factor when the peptide is fused with the transcription factor to create a chimeric protein. Such "functional peptide capable of converting an arbitrary transcription factor into a transcriptional repressor" is not particularly limited. However, it is particularly preferable for the functional peptide to consist of an amino acid sequence known as a 15 repressor domain sequence or an SRDX sequence. Examples of such transcription repressor converting peptide are described in detail in JP Patent Publication (Kokai) No. 2005-204657 A. Any example disclosed in such document can be used. [0036] For example, a transcription repressor converting peptide consists of an amino acid sequence expressed by any one of the following formulae (1) to (8). 20 [0037] (1) X1-Leu-Asp-Leu-X2-Leu-X3 (where X1 denotes a set of 0 to 10 amino acid residues, X2 denotes Asn or Glu, and X3 denotes a set of at least 6 amino acid residues.) (2) Y1-Phe-Asp-Leu-Asn-Y2-Y3 25 (where Y1 denotes a set of 0 to 10 amino acid residues, Y2 denotes Phe or Ile, and Y3 denotes a set of at least 6 amino acid residues.) (3) Z1-Asp-Leu-Z2-Leu-Arg-Leu-Z3 (where Z1 denotes Leu, Asp-Leu, or Leu-Asp-Leu, Z2 denotes Glu, Gln, or Asp, and Z3 -15 denotes a set of 0 to 10 amino acid residues.) (4) Asp-Leu-Z4-Leu-Arg-Leu (where Z4 denotes Glu, Gln, or Asp.) (5) al-Leu- 1-Leu-yl-Leu 5 (6) al-Leu-1-Leu-y2-Leu (7) al-Leu-2-Leu-Arg-Leu (8) a2-Leu- 1-Leu-Arg-Leu (where al denotes Asp, Asn, Glu, Gln, Thr, or Ser, a2 denotes Asn, Glu, Gln, Thr, or Ser, p1 denotes Asp, Gln, Asn, Arg, Glu, Thr, Ser, or His, 02 denotes Asn, Arg, Thr, 10 Ser, or His, yl denotes Arg, Gln, Asn, Thr, Ser, His, Lys, or Asp, and y2 denotes Gln, Asn, Thr, Ser, His, Lys, or Asp in formulae (5) to (8).) Transcription repressor converting peptide of formula (1) The number of amino acid residues in the set denoted by "Xl" may be 0 to 10 for the transcription repressor converting peptide of formula (1). In addition, types of 15 specific amino acids corresponding to amino acid residues in the set denoted by X1 are not particularly limited. Any amino acid can be used. In view of ease of synthesis of the transcription repressor converting peptide of formula (1), it is preferable to minimize the length of the set of amino acid residues denoted by Xl. Specifically, the number of amino acid residues in the set denoted by X1 is preferably not more than 5. 20 [0038] Similarly, the number of amino acid residues in the set denoted by X3 may be at least 6 for the transcription repressor converting peptide of formula (1). In addition, types of specific amino acids corresponding to amino acid residues in the set denoted by X3 are not particularly limited, and thus any amino acid may be used. [0039] 25 Transcription repressor converting peptide of formula (2) -16 As in the case of X1 for the transcription repressor converting peptide of formula (1), the number of amino acid residues in the set denoted by Y1 for the transcription repressor converting peptide of formula (2) may be 0 to 10. In addition, types of specific amino acids corresponding to amino acid residues in the set denoted by 5 Y1 are not particularly limited, and thus any amino acid may be used. The number of specific amino acid residues in the set denoted by Y1 is preferably not more than 5. [0040] Similarly, as in the case of X3 for the transcription repressor converting peptide of formula (1), the number of amino acid residues in the set denoted by Y3 for the transcription repressor converting peptide of formula (2) may be at least 6. In addition, 10 types of specific amino acids corresponding to amino acid residues in the set denoted by Y3 are not particularly limited, and thus any amino acid may be used. [0041] Transcription repressor converting peptide of formula (3) For the transcription repressor converting peptide of formula (3), the set of amino acid 15 residues denoted by Z1 contains 1 to 3 "Leu" amio acids. When it contains a single amino acid, Z1 denotes Leu. When it contains two amino acids, Z1 denotes Asp-Leu. When it contains 3 amino acids, Z1 denotes Leu-Asp-Leu. [0042] Meanwhile, for the transcription repressor converting peptide of formula (3), the number of amino acid residues in the set denoted by Z3 may be 0 to 10. In addition, 20 types of specific amino acids corresponding to amino acid residues in the set denoted by Z3 are not particularly limited, and thus any amino acid may be used. Specifically, the number of amino acid residues in the set denoted by Z3 is preferably not more than 5. Specific examples of an amino acid residue in the set denoted by Z3 include, but are not limited to, Gly, Gly-Phe-Phe, Gly-Phe-Ala, Gly-Tyr-Tyr, and Ala-Ala-Ala. 25 [0043] In addition, the number of amino acid residues consisting of a transcription repressor converting peptide as a whole of formula (3) is not particularly limited. However, in view of ease of synthesis, it is preferably not more than 20 amino acids. [0044] -17 Transcription repressor converting peptide of formula (4) The transcription repressor converting peptide of formula (4) is a hexamer (6mer) consisting of 6 amino acid residues. In addition, if the amino acid residue denoted by Z4 in the transcription repressor converting peptide of formula (4) is Glu, the 5 amino acid sequence of the peptide corresponds to a region ranging from position 196 to position 201 of the amino acid sequence of the Arabidopsis thaliana SUPERMAN protein (SUP protein). [0045] A chimeric protein (fusion protein) is created through fusion of any of the different transcription repressor converting peptides described above and any of the 10 transcription factors described above so as to modify characteristics of the transcription factor. Specifically, a chimeric protein (fusion protein) is created through fusion of the transcription factor and the transcription repressor converting peptide, making it possible to modify the transcription factor into a transcriptional repressor or a negative transcriptional coactivator. In addition, it is possible to further convert a non-dominant 15 transcriptional repressor into a dominant transcriptional repressor. [0046] In addition, a chimeric protein (fusion protein) can be produced by obtaining a fusion gene of a polynucleotide encoding any transcription repressor converting peptide described above and a gene encoding a transcription factor. Specifically, a fusion gene is constructed by linking a polynucleotide encoding the transcription repressor 20 converting peptide (hereinafter refferred to as a "transcription repressor converting polynucleotide") and the gene encoding a transcription factor. The fusion gene is introduced into plant cells, thereby allowing production of a chimeric protein (fusion protein). The specific nucleotide sequence of the transcription repressor converting polynucleotide is not particularly limited. It is only necessary for the transcription 25 repressor converting polynucleotide to comprise a nucleotide sequence corresponding to the amino acid sequence of the transcription repressor converting peptide in accordance with the genetic code of the peptide. In addition, if necessary, the transcription repressor converting polynucleotide may have a nucleotide sequence that serves as a linking site via which the transcription repressor converting polynucleotide is linked to a 30 transcription factor gene. Further, if the amino acid reading frame of the transcription repressor converting polynucleotide does not match the reading frame of the -18 transcription factor gene, the transcription repressor converting polynucleotide can comprise an additional nucleotide sequence that allows matching of both reading frames. Furthermore, the transcription repressor converting polynucleotide may comprise a variety of additional polypeptides such as a polypeptide having a linker function to link a 5 transcription factor and a transcription repressor converting peptide and a polypeptide such as His, Myc, or Flag used for epitope labeling of a chimeric protein (fusion protein). Moreover, if necessary, the chimeric protein (fusion protein) may have a construct such as a sugar chain, an isoprenoid group, or the like as well as such polypeptide. 10 [0047] A method for producing a plant is not particularly limited as long as it comprises a step of producing the above chimeric protein comprising a transcription factor and a transcription repressor converting peptide in a plant. However, for example, a production method comprising steps such as an expression vector construction step, a transformation step, and a selection step can be used. Each step is specifically described 15 below. [0048] Expression vector construction step The expression vector construction step is not particularly limited as long as it includes a step of constructing a recombinant expression vector containing the gene 20 encoding a transcription factor, a transcription repressor converting polynucleotide, and a promoter. As a vector serving as a mother body for a recombinant expression vector, various conventionally known vectors can be used. For example, plasmids, phages, cosmids, or the like can be used and such vector can be appropriately selected depending on plant cells into which it is introduced and introduction methods. Specific examples 25 of such vector include pBR322, pBR325, pUC19, pUC119, pBluescript, pBluescriptSK, and pBI vectors. Particularly, when a method for introduction of a vector into a plant uses Agrobacterium, a pBI binary vector is preferably used. Specific examples of such pBI binary vector include pBIG, pBIN19, pBI101, pBIl21, and pBI221. [0049] A promoter used herein is not particularly limited as long as it can cause gene 30 expression in plants. Any known promoter can be appropriately used. Examples of such -19 promoter include a cauliflower mosaic virus 35S promoter (CaMV35S), various actin gene promoters, various ubiquitin gene promoters, a nopaline synthase gene promoter, a tobacco PRia gene promoter, a tomato ribulosel,5-bisphosphate carboxylase-oxidase small subunit gene promoter, a napin gene promoter, and an oleosin gene promoter. Of 5 these, a cauliflower mosaic virus 35S promoter, an actin gene promoter, or a ubiquitin gene promoter can be more preferably used. The use of each of the above promoters enables strong expression of any gene when it is introduced into plant cells. The specific structure of a recombinant expression vector itself is not particularly limited as long as the promoter is linked to a fusion gene obtained by linking a gene encoding a 10 transcription factor or a transcriptional coactivator and a transcription repressor converting polynucleotide so as to cause expression of the gene and introduced into the vector. [0050] In addition, a recombinant expression vector may further contain other DNA segments, in addition to a promoter and the fusion gene. Such other DNA segments are 15 not particularly limited and examples thereof include a terminator, a selection marker, an enhancer, and a nucleotide sequence for enhancing translation efficiency. Also, the above recombinant expression vector may further have a T-DNA region. A T-DNA region can enhance efficiency for gene introduction particularly when the above recombinant expression vector is introduced into a plant using Agrobacterium. 20 [0051] A transcription terminator is not particularly limited as long as it has functions as a transcription termination site and may be any known transcription terminator. For example, specifically, a transcription termination region (Nos terminator) of a nopaline synthase gene, a transcription termination region (CaMV35S terminator) of cauliflower mosaic virus 35S, or the like can be preferably used. Of them, the Nos terminator can be 25 more preferably used. In the case of the above recombinant vector, a phenomenon such that an unnecessarily long transcript is synthesized and that a strong promoter decreases the number of copies of a plasmid after introduction into plant cells can be prevented by arranging a transcription terminator at an appropriate position. [0052] As a transformant selection marker, a drug resistance gene can be used, for 30 example. Specific examples of such drug resistance gene include drug resistance genes against hygromycin, bleomycin, kanamycin, gentamicin, chloramphenicol, and the like.

- 20 Transformed plants can be easily selected by selecting plants that can grow in medium containing the above antibiotics. [0053] An example of a nucleotide sequence for increasing translation efficiency is an omega sequence from tobacco mosaic virus. This omega sequence is arranged in an 5 untranslated region (5'UTR) of a promoter, so that the translation efficiency of the fusion gene can be increased. As such, the recombinant expression vector can contain various DNA segments depending on purposes. [0054] A method for constructing a recombinant expression vector is not particularly limited. To an appropriately selected vector serving as a mother body, the above 10 promoter, a gene encoding a transcription factor, a transcription repressor converting polynucleotide, and, if necessary, the above other DNA segments may be introduced in a predetermined order. For example, a gene encoding a transcription factor and a transcription repressor converting polynucleotide are linked to construct a fusion gene, and then the fusion gene and the promoter (e.g., a transcription terminator according to 15 need) are then linked to construct an expression cassette and then the cassette may be introduced into a vector. [0055] In construction of a chimeric gene (fusion gene) and an expression cassette, for example, cleavage sites of DNA segments are prepared to have protruding ends complementary to each other and then performing a reaction with a ligation enzyme, 20 making it possible to specify the order of the DNA segments. In addition, when an expression cassette contains a terminator, DNA segments may be arranged in the following order from upstream: a promoter, the chimeric gene, and a terminator. Also, reagents for construction of an expression vector (that is, types of restriction enzymes, ligation enzymes, and the like) are also not particularly limited. Hence, commercially 25 available reagents can be appropriately selected and used. [0056] Also, a method for replicating (a method for producing) the above expression vector is not particularly limited and conventionally known replication methods can be used herein. In general, such expression vector may be replicated within Escherichia coli as a host. At this time, preferred types of Escherichia coli may be selected 30 depending on the types of vector.

- 21 [0057] Transformation step The transformation step carried out in the present invention is a step of introducing the fusion gene into plant cells using the above recombinant expression 5 vector so as to cause the expression of the gene. A method for introducing such gene into plant cells (transformation method) using a recombinant expression vector is not particularly limited. Conventionally known appropriate introduction methods can be used depending on plant cells. Specifically, a method using Agrobacterium or a method that involves direct introduction into plant cells can be used, for example. As a method 10 using Agrobacterium, a method described in the following can be employed, for example: Bechtold, E., Ellis, J. and Pelletier, G. (1993), In Planta Agrobacterium mediated gene transfer by infiltration of adult Arabidopsis plants. C. R. Acad. Sci. Paris Sci. Vie, 316, 1194-1199; or Zyprian E, Kado Cl, Agrobacterium-mediated plant transformation by novel mini-T vectors in conjunction with a high-copy vir region 15 helper plasmid, Plant Molecular Biology, 1990, 15(2), 245-256. [0058] As a method for directly introducing DNA comprising a recombinant expression vector and a target gene into plant cells, microinjection, electroporation, a polyethylene glycol method, a particle gun method, protoplast fusion, a calcium phosphate method, or the like can be employed. 20 [0059] Also, when a method for directly introducing DNA into plant cells is employed, DNA that can be used herein contains transcriptional units required for the expression of a target gene, such as a promoter and a transcription terminator, and a target gene. Vector functions are not essential in such case. Moreover, a DNA that contains a protein coding region alone of a target gene having no transcriptional unit may be used herein, 25 as long as it is integrated into a host's transcriptional unit and then the target gene can be expressed. [0060] Examples of plant cells into which DNA comprising the above recombinant expression vector and a target gene or DNA containing no expression vector but a target gene DNA is introduced include cells of each tissue of plant organs such as flowers, 30 leaves, and roots, calluses, and suspension-cultured cells. At this time, according to the - 22 plant production method of the present invention, an appropriate expression vector may be constructed as the above recombinant expression vector according to the type of plant to be produced or a versatile expression vector may be constructed in advance and then introduced into plant cells. That is to say, the plant production method of the present 5 invention may or may not comprise a step of constructing a DNA for transformation using the recombinant expression vector. [0061] Other steps and methods The plant production method of the present invention needs to comprise at 10 least the transformation step, and the method may further comprise a step of constructing the DNA for transformation using the recombinant expression vector. The method may further comprise other steps. Specifically, for example, a step of selecting an appropriate transformant from among transformed plants can be employed. [0062] A selection method is not particularly limited. For example, selection may be 15 carried based on drug resistance such as hygromycin resistance. Alternatively, selection may be carried out based on the fat and oil content in seeds collected from cultivated transformants (plants). For example, a method comprising collecting plant seeds, determining the fat and oil content in the seeds according to a standard method, and comparing the fat and oil content with the fat and oil content in non-transformed plant 20 seeds can be employed in a case in which selection is carrried out based on the fat and oil content (see the Examples described below). [0063] According to the plant production method of the present invention, the fusion gene is introduced into a plant. This makes it possible to obtain an offspring plant having a significantly improved fat and oil content in comparison with the plant via 25 sexual reproduction or asexual reproduction. Also, plant cells or reproductive materials, such as seeds, fruits, stocks, calluses, tubers, cut ears, or lumps, may be obtained from the plant or an offspring plant thereof. The plant can be mass-produced therefrom based on such materials. Therefore, the plant production method of the present invention may comprise a reproduction step (mass production step) for reproducing a selected plant. 30 [0064] In addition, the plant of the present invention may include a matter comprising at - 23 least any one of an adult plant, plant cells, plant tissue, callus, and seeds. That is, according to the present invention, any matter in a state that allows it to eventually grow to become a plant can be regarded as a plant. In addition, plant cells include plant cells in various forms. Examples of such plant cells include suspension-cultured cells, 5 protoplasts, and leaf sections. As a result of proliferation/differentiation of such plant cells, a plant can be obtained. In addition, a plant can be reproduced from plant cells by a conventionally known method depending on the types of plant cells. Therefore, the plant production method of the present invention may comprise a regeneration step of regenerating a plant from plant cells or the like. 10 [0065] In addition, the plant production method of the present invention is not limited to a method of transformation using a recombinant expression vector. A different method may be used. Specifically, for example, the chimeric protein (fusion protein) itself can be administered to a plant. In this case, the chimeric protein (fusion protein) can be administered to a young plant such that the fat and oil content can be improved at a part 15 of a plant that is eventually used. In addition, a method of administration of a chimeric protein (fusion protein) is not particularly limited, and a different known method can be used. [0066] As described above, according to the present invention, it becomes possible to provide a plant for which the material productivity has been caused to vary (to be 20 improved or reduced) relative to the material productivity of a wild-type plant by inducing expression of a chimeric protein comprising a predetermined transcription factor and any functional peptide described above. When the chimeric protein is expressed in a plant, it might cause reppression of transactivation activity of a target transcription factor or it might cause exhibition of transcription repression effects upon a 25 sequence homologous to a cis sequence recognized by a target transcription factor. Further, in some cases, such chimeric protein functions to change the specific affinity of another factor, DNA, RNA, lipid, or carbohydrate having affinity to a target transcription factor or transcriptional coactivator. Alternatively, in some cases, it functions to cause a substance having no affinity to a target transcription factor to have 30 improved affinity thereto. The following factors can be expressed in a similar manner in the plant of the present invention: a transcription factor that constitutes a chimeric protein; a transcription factor capable of recognizing a cis sequence homologous to a cis - 24 sequence recognized by the transcription factor; a transcription factor homologous to a transcription factor that constitutes a chimeric protein; other factors each having affinity to a transcription factor that constitutes a chimeric protein; and the like. However, the above effects of a chimeric protein allow suppression of gene expression to be controlled 5 in a dominant-negative manner. Accordingly, the expression levels of gene groups involved in plant growth and the expression levels of gene groups involved in fat and oil production in seeds and/or gene groups involved in decomposition of produced fats and oils would vary in the plant of the present invention. This is thought to cause significant variation in fat and oil content. 10 [0067] Here, significant variation in the fat and oil content exists in a case in which the plant of the present invention exhibits an improvement of fat and oil content over a wild type plant while the single seed mass remains stable, a case in which the plant of the present invention is found to exhibit improvement of fat and oil content with a significantly higher or lower level of single seed mass than that of a wild-type plant, or a 15 case in which the plant of the present invention is found to exhibit improvement or reduction of fat and oil content in seeds when compared with a wild-type plant. In any case, it corresponds to a variation in the content of fat and oil produced by a single individual plant. [0068] More specifically, if a chimeric protein comprising any transcription factor listed 20 in table 1 is expressed in a plant, the fat and oil content in the plant would be improved. Among the plants of the present invention, a plant confirmed to have increased fat and oil content can be used for a method for producing plant-derived fats and oils. For example, fat and oil can be produced by cultivating the plant of the present invention, taking seeds therefrom, and collecting fat and oil components from the obtained seeds. 25 In particular, it can be said that the fat and oil production method using the plant of the present invention is a method whereby high fat and oil content in a single plant indiviual can be achieved, resulting in excellent productivity. In other words, assuming that the number of cultivated plant individuals per unit area of cultivated acreage is stable, the amount of fat and oil produced per unit area of cultivated acreage can be remarkabley 30 improved with the use of the plant of the present invention. Therefore, cost necessary for fat and oil production can be significantly reduced with the use of the plant of the present invention.

- 25 [0069] Further, it can be said that the method for producing fat and oil using a plant of the present invention is a method excellent in terms of productivity. This is because high fat and oil contents per unit weight can be achieved thereby. In addition, fats and oils produced by the method for producing fat and oil using a plant of the present 5 invention are not particularly limited. Examples of such fats and oils include plant derived fats and oils such as soybean oil, sesame oil, olive oil, coconut oil, rice oil, cottonseed oil, sunflower oil, corn oil, safflower oil, and rapeseed oil. In addition, produced fat and oil can be extensively used for household and industrial applications. Also, such fat and oil can be used as raw materials for biodiesel fuel. That is, the above 10 fats and oils used for household and industrial applications, biodiesel fuel, and the like can be produced at low cost with the use of the plant of the present invention. [0070] Meanwhile, when a chimeric protein comprising any transcription factor listed in table 2 is expressed in a plant, the fat and oil content in the plant decreases. The plant of the present invention in which the fat and oil content is reduced can be used for a 15 method for producing bioalcohol using lignocellulose contained in plants. That is, bioalcohol can be produced with excellent glycosylation efficiency and low impurity contents because the contents of fat and oil components that become impurities in a step of glycosylation of lignocellulose are low in such plant. [0071] 20 Concerning At5g22380 As described above, when a chimeric protein comprising a repressor domain and any transcription factor listed in table 1 is expressed in a plant, the fat and oil content in seeds is significantly improved. When a chimeric protein comprising a repressor domain and any transcription factor listed in table 2 is expressed in a plant, the 25 fat and oil content in seeds is significantly reduced. Therefore, if any transcription factor listed in table 1 that is originally not fused with a repressor domain is introduced as is into a plant, it is highly probable that the fat and oil content in seeds will be significantly reduced. In addition, if any transcription factor listed in table 2 that is originally not fused with a repressor domain is introduced as is into a plant, it is highly probable that 30 the fat and oil content in seeds will be significantly improved. Here, each transcription factor can be obtained by techniques described in the above paragraphs about "the - 26 expression vector construction step," "the transformation step," and "the other step or method." [0072] In particular, as demonstrated in the Examples below, when a chimeric protein comprising At5g22380, which is one of the transcription factors listed in table 2, and a 5 repressor domain is expressed in a plant, the fat and oil content in seeds is significantly reduced. However, when At5g22380 (used as a transcription factor that is originally not fused with a repressor domain in a plant) is expressed as is in a plant, it exhibits a characteristic feature of causing the fat and oil content in seeds to be significantly improved. That is, productivity of fat and oil in seeds can be improved by causing 10 At5g22380 to be expressed in a plant as an Arabidopsis-thaliana-derived transcription factor. [0073] In order to cause a transcription factor (At5g22380) to be expressed in a plant, techniques described in the above paragraphs about "the expression vector construction step," "the transformation step," and "the other step or method" can be employed. In 15 addition, a transcription factor that is expressed to improve the fat and oil content in seeds is not limited to an Arabidopsis-thaliana-derived transcription factor (At5g223 80). It may be a homologous transcription factor defined as above. These homologous transcription factors can be searched for using the genomic information of a search target plant based on the amino acid sequence of At5g22380 shown in SEQ ID NO: 156 20 or the nucleotide sequence of the At5g22380 gene shown in SEQ ID NO: 155. Homologous transcription factors can be identified by searching for amino acid sequences having, for example, 70% or higer, preferably 80% or higher, more preferably 90% or higher, and most preferably 95% or higher homology to the amino acid sequence shown in SEQ ID NO: 156. Here, the value of homology refers to a value that can be 25 found based on default setting using a computer equipped with a BLAST algorithm and a database containing gene sequence information. [0074] In addition, a homologous gene can be identified by, when the plant genome information remains unclarified, extracting the genome from a target plant or constructing a cDNA library for a target plant and then isolating a genomic region or 30 cDNA hybridizing under stringent conditions to at least a portion of the gene comprising the nucleotide sequence shown in SEQ ID NO: 155. Here, the term "stringent - 27 conditions" is defined as the same as the above conditions. [Example ] [0075] The present invention is hereafter described in greater detail with reference to the following examples, although the technical scope of the present invention is not limited 5 thereto. [0076] [Example 1] Transcription factor gene amplification Each of the following transcription factors was subjected to PCR 10 amplification of a coding region DNA fragment excluding a termination codon using the Arabidopsis thaliana cDNA library and primers described below: AtgO1010, AtlgO1250, At1g09540, Atlgl200, At1g12260, At1g12890, At1g12980, Atlg14510, At1g15360, At1g17520, At1g18330, At1g18570, At1g19490, At1g22640, At1g22985, At1g24260, At1g24590, At1g25470, At1g25580, At1g27360, At1g27370, At1g27730, 15 At1g28160, At1g28520, Atlg30210, Atlg30810, At1g32770, At1g33760, At1g34190, At1g36060, At1g43160, At1g43640, At1g44830, At1g49120, At1g52150, At1g52880, At1g52890, At1g53230, Atlg56010, At1g56650, At1g60240, Atlg61110, At1g62700, At1g63040, At1g63910, At1g64380, At1g67260, At1g67780, At1g68800, At1g69120, At1g69490, Atlg71030, At1g71450, At1g71692, At1g72360, At1g72570, At1g74840, 20 At1g74930, At1g76580, At1g77200, At1g77450, At1g78080, At1g79180, At1g80580, At2g02070, At2g02450, At2g 17040, At2g 18060, At2g22200, At2g23290, At2g23760, At2g26060, At2g28550, At2g30420, At2g30470, At2g31230, At2g33480, At2g33710, At2g35700, At2g40220, At2g41710, At2g42400, At2g42830, At2g44840, At2g44940, At2g45650, At2g45680, At2g46310, At2g46590, At2g47520, At3g01530, At3g02150, 25 At3g02310, At3g04060, At3g04070, At3g04420, At3g05760, At3g09600, At3g10490, At3g11280, At3g14230, At3g15500, At3g15510, At3g18550, At3g20770, At3g23220, At3g23230, At3g23240, At3g25890, At3g27920, At3g28910, At3g29035, At3g45150, At3g49850, At3g54320, At3g61910, At4gO1060, At4g01550, At4g18390, At4g18450, At4g23750, At4g26150, At4g27950, At4g28140, At4g28530, At4g31060, At4g31270, 30 At4g32800, At4g34410, At4g35580, At4g36160, At4g37750, At4g38620, At4g39780, - 28 At5g02460, At5gO6100, At5g07310, At5g07580, At5g07680, At5g07690, At5g08070, At5g08790, At5g09330, At5g13180, At5g13330, At5g13910, At5g14000, At5g18270, At5g18560, At5g18830, At5g22290, At5g22380, At5g23260, At5g24520, At5g24590, At5g25190, At5g25390, At5g25810, At5g35550, At5g39610, At5g40330, At5g41030, 5 At5g43270, At5g47220, At5g47230, At5g47390, At5g51190, At5g52020, At5g53290, At5g54230, At5g58900, At5g60970, At5g61600, At5g62380, At5g64530, At5g64750, At5g66300, At5g67000, At5g67300 and At5g67580. Note that a DNA fragment of a region including a termination codon was amplified for At5g22380. PCR was carried out under conditions of 94'C for 1 minute, 47'C for 2 minutes, and elongation reaction 10 at 74'C for 1 minute for 25 cycles. Next, each PCR product was isolated by agarose gel electrophoresis and collected.

- 29 [Table 3] AGI code Fowerd primer Nucleotide sequence Reverse primer Nucleotide sequence AtIgO1OO GATGGAGGATCAAGTTGGGTTTGGG SEQ ID NO: 159 ACCAACAAGAATGATCCAACTAATG SEQ ID NO: 160 AtlgO1250 AJGTCACCACAGAGAATGAAGC SEQ ID NO: 161 CAGACACGCCATGAACTGATAC SEQ ID NO: 162 At1g09540 GATGGGGAGACATTCTTGCTGTTACAAACA SEQ ID NO: 163 AGGGACTGACCAAAAGAGACGGCCATTCT SEQ ID NO: 164 Atlg1O200 GGGATGGCGTTCGCAGGAACAACCCAGAAATG SEQ ID NO: 165 AGCAGCGACGACTTTGTCCTTGGCG SEQ ID NO: 166 At1g12260 GATGAATTCATTTTCCCACGTCCCTCCGGG SEQ ID NO: 167 CTTCCATAGATCAATCTGACAACTCGAAGA SEQ ID NO: 168 At1g12890 AGTTGAAATCAAGTAACAAGAG SEQ ID NO: 169 CATAAGAAACTGTGGAGCATC SEQ ID NO: 170 At1g12980 ATGGAAAAAGCCTTGAGAAACTTC SEQ ID NO: 171 [CCCCACGATCTTCGGCAAGTACA SEQ ID NO: 172 At1g14510 AJGGAAGGAATTCAGCATCC SEQ ID NO: 173 GGCTTTCATTTTCTTGCTGG SEQ ID NO: 174 At1g15360 AJGGTACAGACGAAGAAGTTCAG SEQ ID NO: 175 GTTTGTATTGAGAAGCTCCTCTATC SEQ ID NO: 176 At1g17520 GATGGGAAATCAGAAGCTCAAATGGACGGC SEQ ID NO: 177 ATTCAAGTACATAATCTTTCCCTGACTACA SEQ ID NO: 178 At1g18330 GATGGCCGCTGAGGATCGAAGTGAGGAACT SEQ ID NO: 179 GCATATACGTGCTCTTTGGCTTTTCTTTTC SEQ ID NO: 180 At1g18570 GATGGTGCGGACACCGTGTTGCAAAGCTGA SEQ ID NO: 181 [CCAAAATAGTTATCAATTTCGTCAAACAA SEQ ID NO: 182 At1g19490 GATGGAGTTGGAGCCTATATCATCGAGTTG SEQ ID NO: 183 [CCGACCTGCATCCGACATTGACGGCCATG SEQ ID NO: 184 At1g22640 GATGGGAAGATCACCATGCTGCGAGAAAGC SEQ ID NO: 185 ATGAGTTCTAACATCAGAAACCCGACAATT SEQ ID NO: 186 At1g22985 AJGAAACGAATTGTTCGAATTTCATTC SEQ ID NO: 187 ACAACTTCTTCAGAAGCACCAC SEQ ID NO: 188 At1g24260 GATGGGAAGAGGGAGAGTAGAATTGAAGAG SEQ ID NO: 189 \ATAGAGTTGGTGTCATAAGGTAACCAACC SEQ ID NO: 190 At1g24590 AJGGAAGAAGCAATCATGAGAC SEQ ID NO: 191 ATAATCATCATGAAAGCAATACTG SEQ ID NO: 192 At1g25470 AJGTCGGCTGTGTCTGAATCG SEQ ID NO: 193 ACCAAACCGAGAGGCGGTG SEQ ID NO: 194 At1g25580 GATGGCTGGGCGATCATGGCTGATC SEQ ID NO: 195 CAGCAGCGTGGCAGTGTGTTGCC SEQ ID NO: 196 At1g27360 GATGGACTGCAACATGGTATCTTCGTCCCA SEQ ID NO: 197 TTTGGTACAACATCATATGAACAGAGTAG SEQ ID NO: 198 At1g27370 GATGGACTGCAACATGGTATCTTCGTTCCC SEQ ID NO: 199 GATGAAATGACTAGGGAAAGTGCCAAATAT SEQ ID NO: 200 At1g27730 GATGGCGCTCGAGGCTCTTACATCACCAAG SEQ ID NO: 201 \AGTTGAAGTTTGACCGGAAAGTCAAACCG SEQ ID NO: 202 At1g28160 AJGGAGTTCAATGGTAATTTGAATG SEQ ID NO: 203 TGGTAGAAGAATGTGGAGGG SEQ ID NO: 204 At1g28520 GATGACGGGGAAGCGATCAAAGAC SEQ ID NO: 205 GGGGATATAATAGTCGCTTAGATTTC SEQ ID NO: 206 At1g30210 AJGGAGGTTGACGAAGACATTG SEQ ID NO: 207 [CTCCTTTCCTTTGCCTTGTC SEQ ID NO: 208 Atlg3O81O GATGGAAAATCCTCCATTAGAATCTGAGAT SEQ ID NO: 209 CATCAAATCTACTCCGAAAAGTTTTCCTTT SEQ ID NO: 210 At1g32770 GATGGCTGATAATAAGGTCAATCTTTCGAT SEQ ID NO: 211 [ACAGATAAATGAAGAAGTGGGTCTAAAGA SEQ ID NO: 212 At1g33760 AJGGAAAACACTTACGTTGGCC SEQ ID NO: 213 \TTATTAGAATTCCATATGGACTG SEQ ID NO: 214 At1g34190 GATGGCGGATTCTTCACCCGATTCG SEQ ID NO: 215 GTCTTTCAAGAGAAGACTTCTACC SEQ ID NO: 216 At1g36060 AJGGCGGATCTCTTCGGTGG SEQ ID NO: 217 CGATAAAATTGAAGCCCAATCTATC SEQ ID NO: 218 At1g43160 AJGGTGTCTATGCTGACTAATG SEQ ID NO: 219 ACCAAAAGAGGAGTAATTGTATTG SEQ ID NO: 220 At1g43640 GATGTCGTTTCTGAGTATTGTTCGTGATGT SEQ ID NO: 221 TCACATGCCAATTTAGTATCAAAGGTGCT SEQ ID NO: 222 At1g44830 AJGGTGAAAACACTTCAAAAGACAC SEQ ID NO: 223 GCAGAAGTTCCATAATCTGATATC SEQ ID NO: 224 At1g49120 AJGATCAGTTTCAGAGAAGAGAAC SEQ ID NO: 225 [AAAAACTTATCGATCCAATCAGTAG SEQ ID NO: 226 At1g52150 GATGGCAATGTCTTGCAAGGATGGTAAGTT SEQ ID NO: 227 CACAAAGGACCAATTGATGAACACAAAGCA SEQ ID NO: 228 At1g52880 GATGGAGAGTACAGATTCTTCCGGTGGTCC SEQ ID NO: 229 AGAATACCAATTCAAACCAGGCAATTGGTA SEQ ID NO: 230 At1g52890 GATGGGTATCCAAGAAACTGACCCGTTAAC SEQ ID NO: 231 CATAAACCCAAACCCACCAACTTGCCCCGA SEQ ID NO: 232 At1g53230 GATGAAGAGAGATCATCATCATCATCATCA SEQ ID NO: 233 ATGGCGAGAATCGGATGAAGC SEQ ID NO: 234 Atlg56010 GATGGAGACGGAAGAAGAGATGAAG SEQ ID NO: 235 GCAATTCCAAACAGTGCTTGGAATAC SEQ ID NO: 236 At1g56650 UUAIAMII I W I UU SEQ ID NO: 237 AIUAAAIIIUAUAUIUIUIUUAIUUAAAAUAUI SEQ ID NO: 238 At1g60240 GATGAAGTCAAGACGTGAACAATCAATCGA SEQ ID NO: 239 [TTATAGTAACCTCGAATGTGCTGGGCCAA SEQ ID NO: 240 Atlg6111O GATGGAAAACATGGGGGATTCGAGCATAG SEQ ID NO: 241 [GAGTGCCAGTTCATGTTAGGAAGCTG SEQ ID NO: 242 At1g62700 GATGAATTCGTTTTCACAAGTACCTCCTGG SEQ ID NO: 243 GAGATCAATCTGACAACTTGAAGAAGTAGA SEQ ID NO: 244 At1g63040 AJGGCTGACCCTAACAATCCTATC SEQ ID NO: 245 ATAGCTCCACAAGCTCTCTCC SEQ ID NO: 246 At1g63910 GATGGGTCATCACTCATGCTGCAACCAGCA SEQ ID NO: 247 AACGAAGAAGGGAAAGAAGAAGATAAGGC SEQ ID NO: 248 At1g64380 AJGGAAGAAAGCAATGATATTTTTC SEQ ID NO: 249 ATTGGCAAGAACTTCCCAAATCAG SEQ ID NO: 250 At1g67260 AJGTCGTCTTCCACCAATGAC SEQ ID NO: 251 GTTTACAAAAGAGTCTTGAATCC SEQ ID NO: 252 At1g67780 GATGGCTATTGAGGGTGAGAAAGAGAAACC SEQ ID NO: 253 [GCTACCACATTTGTGTTCTTCAATGTTTG SEQ ID NO: 254 At1g68800 AJGTTTCCTTCTTTCATTACTCAC SEQ ID NO: 255 ATTAGGGTTTTTAGTTAACACATTG SEQ ID NO: 256 At1g69120 GATGGGAAGGGGTAGGGTTCAATTGAAGAG SEQ ID NO: 257 [GCGGCGAAGCAGCCAAGGTTGCAGTTGTA SEQ ID NO: 258 At1g69490 GATGGAAGTAACTTCCCAATCTACCCTCCC SEQ ID NO: 259 AACTTAAACATCGCTTGACGATGATGGTT SEQ ID NO: 260 Atlg71O3O GATGAACAAAACCCGCCTTCGTGCTCTCTC SEQ ID NO: 261 [CGGAATAGAAGAAGCGTTTCTTGACCTGT SEQ ID NO: 262 At1g71450 AJGGCTGGTCTTAGGAATTCCG SEQ ID NO: 263 AGGGTCCCAAAGAAAGTCACTC SEQ ID NO: 264 At1g71692 GATGGCTCGTGGAAAGATTCAGCTTAAGAG SEQ ID NO: 265 GAACTGAAATATTTCACTTGGCATTGTTAG SEQ ID NO: 266 - 30 [0077] At1g72360 ATGTGCGGAGGAGCTGTAATTTC SEO ID NO: 267 GGACCATAGACCCATGTCATTG SEO ID NO: 268 At1g72570 ATGAAGAAATGGTTGGGATTTTCATTG SEO ID NO: 269 GTGGCCGGCGCCAGAGCTGGTG SEO ID NO: 270 At1g74840 GATGGCCGACGGTAGTACTAGTTCTTCGGA SEO ID NO: 271 AGCGACTCCAATCGTGTTGAATGCTGGATG SEO ID NO: 272 At1g74930 ATGGTGAAGCAAGCGATGAAGG SEO ID NO: 273 AAAATCCCAAAGAATCAAAGATTC SEO ID NO: 274 At1g76580 GATGGATGTTATGGCTTTGTTAACAGCTTT SEO ID NO: 275 ACTCTTTGCAAATCGTGGCATTGGCTCAAT SEO ID NO: 276 At1g77200 ATGACCGAGTCATCCATTATCTC SEO ID NO: 277 AGGAAAAAGGGGGCCAAAATTG SEO ID NO: 278 At1g77450 GATGATGAAATCTGGGGCTGATTTGC SEO ID NO: 279 GAAAGTTCCCTGCCTAACCACAAGTGG SEO ID NO: 280 At1g78080 GATGGCAGCTGCTATGAATTTGTAC SEO ID NO: 281 AGCTAGAATCGAATCCCAATCG SEO ID NO: 282 At1g79180 GATGGGGAAGGGAAGAGCACCTTGTTGTGA SEO ID NO: 283 ATGTATCATGAGCTCGTAGTTCTTCAAGAG SEO ID NO: 284 At1g80580 ATGGAAAACAGCTACACCGTTG SEO ID NO: 285 CTTCCTAGACAACAACCCTAAAC SEO ID NO: 286 At2g02070 GATGGCTGCTTCTTCATCCTCCGCTGCTTC SEO ID NO: 287 GAAACTCGCATGATGGATTCCATAAGGTGG SEO ID NO: 288 At2g02450 GATGGCGGCGATAGGAGAGAAAG SEO ID NO: 289 CTTAAAAGGAATATTAGTATAGTG SEO ID NO: 290 At2g17040 GATGGTTTACGGTAAGAGATCGAG SEO ID NO: 291 CCAATATATGTTAACTATTGGTG SEO ID NO: 292 At2g18060 GATGGAGCCAATGGAATCTTGTAGCGTTCC SEO ID NO: 293 ATTATCAAATACGCAAATCCCAATATCATA SEO ID NO: 294 At2g22200 ATGGAAACTGCTTCTCTTTOTTTC SEO ID NO: 295 AGAATTGGCCAGTTTACTAATTGC SEO ID NO: 296 At2g23290 GATGTCTGGTTCGACCCGGAAAGAAATGGA SEO ID NO: 297 CTCGATCCTACCTAATCCAATAAACTCTCT SEO ID NO: 298 At2g23760 GATGGGTTTAGCTACTACAACTTCTTCTAT SEO ID NO: 299 AAAATCTCCAAAGTCTCTAACGGAGAAAGA SEO ID NO: 300 At2g26060 GATGGATTTGATGGAGAAGAACTTGGAGTT SEO ID NO: 301 CGGTTTAGTTGCAAGCTGCCAAATCTTGAC SEO ID NO: 302 At2g28550 GATGTTGGATCTTAACCTCAACGC SEO ID NO: 303 AGGGTGTGGATAAAAGTAACCAC SEO ID NO: 304 At2g30420 GATGGATAATACCAACCGTCTTCGTCTTCG SEO ID NO: 305 CAATTTTAGATTTTCTTGGAGATTAAGAGG SEO ID NO: 306 At2g30470 GATGTTTGAAGTCAAAATGGGGTCAAAGAT SEO ID NO: 307 GCTTGAAACTCTCGGCTCTTCACGAACATT SEO ID NO: 308 At2g31230 ATGTATTCATCTCCAAGTTCTTGG SEO ID NO: 309 ACATGAGCTCATAAGAAGTTGTTC SEO ID NO: 310 At2g33480 GATGGAGAAGAGGAGCTCTATTAAAAACAG SEO ID NO: 311 TAGAAACAAACAAAACTTATTTTCCCGATA SEO ID NO: 312 At2g33710 ATGCATAGCGGGAAGAGACCTC SEO ID NO: 313 TTTTCGTCGTTTGTGGATACTAATG SEO ID NO: 314 At2g35700 ATGGAACGTGACGACTGCCGG SEO ID NO: 315 GTAACTTTGAGAGAGGAAGGGTTC SEO ID NO: 316 At2g40220 ATGGACCCTTTAGCTTCCCAAC SEO ID NO: 317 ATAGAATTCCCCCAAGATGGGATC SEO ID NO: 318 At2g41710 GATGGCGTCGGTGTCGTCGTC SEO ID NO: 319 TTTCTCTTGTGGGAGGTAGCTG SEO ID NO: 320 At2g42400 GATGAAGAGAACACATTTGGCAAGTTTTAG SEO ID NO: 321 GAGGTAGCCTAGTCGAAGCTCCAAATCAAG SEO ID NO: 322 At2g42830 GATGGAGGGTGGTGCGAGTAATGAAGTAGC SEO ID NO: 323 AACAAGTTGCAGAGGTGGTTGGTCTTGGTT SEO ID NO: 324 At2g44840 ATGAGCTCATCTGATTCCGTTAATAAC SEO ID NO: 325 TATCCGATTATCAGAATAAGAACATTC SEO ID NO: 326 At2g44940 ATGGCAAGACAAATCAACATAGAG SEO ID NO: 327 TTCAGATAGAAAAAACGGCTCTTC SEO ID NO: 328 At2g45650 GATGGGAAGAGGGAGAGTGGAGATGAAGAG SEO ID NO: 329 AAGAACCCAACCTTGGACGAAATTAGTCTC SEO ID NO: 330 At2g45680 ATGGCGACAATTCAGAAGCTTG SEO ID NO: 331 GTGGTTCGATGACCGTGCTG SEO ID NO: 332 At2g46310 ATGAAAAGCCGAGTGAGAAAATC SEO ID NO: 333 TTACTTATCCAACAAATGATCTTGG SEO ID NO: 334 At2g46590 GATGATGAACGTTAAACCAATGGAGCAGAT SEO ID NO: 335 CCATGAAGATCCTCCTCCTGTAGTACTGAA SEO ID NO: 336 At2g47520 ATGTGTGGGGGAGCTATCATTTC SEO ID NO: 337 ATTGGAGTCTTGATAGCTCC SEO ID NO: 338 At3g01530 GATGGAGACGACGATGAAGAAGAAAGGGAG SEO ID NO: 339 AATCACATGGTGGTCACCATTAAGCAAGTG SEO ID NO: 340 At3g02150 ATGAATATCGTCTCTTGGAAAGATG SEO ID NO: 341 ATTGGTGGAGAGTTTCCAAGCCGAGGTGGC SEO ID NO: 342 At3g02310 GATGGGAAGAGGAAGAGTAGAGCTCAAGAG SEO ID NO: 343 CAGCATCCAGCCAGGGATGTAGCCGTTTCC SEO ID NO: 344 At3g04060 GATGGTGGAAGAAGGCGGCGTAG SEO ID NO: 345 GCTAGTATATAAATCTTCCCAGAAG SEO ID NO: 346 At3g04070 GATGATAAGCAAGGATCCAAGATCGAGTTT SEO ID NO: 347 GCCTTGATATTGAAGGTGAGAACTCATCAT SEO ID NO: 348 At3g04420 GATGGAGAATCCGGTGGGTTTAAG SEO ID NO: 349 TGTTCTTGAGATAGAAGAACATTGG SEO ID NO: 350 At3g05760 GATGGCTTCGAGCAACACGACTACTGGGGT SEO ID NO: 351 TGATTTTTTTGAAGATCCAAAGCCCCCAAA SEO ID NO: 352 At3g09600 GATGAGCTCGTCGCCGTCAAGAAATCCAAC SEO ID NO: 353 TGCTGATTTGTCGCTTGTTGAGTTCTTGAC SEO ID NO: 354 At3g10490 GATGGGTCGCGAATCTGTGGCTGTTG SEO ID NO: 355 TTGTCCATTAGCATTGTTCTTCTTG SEO ID NO: 356 At3g11280 GATGGAGACTCTGCATCCATTCTCTCACCT SEO ID NO: 357 AGCTCCGGCACTGAAGACATTTTCTCCGGC SEO ID NO: 358 At3g14230 ATGTGTGGAGGAGCTATAATCTC SEO ID NO: 359 AAAGTCTCCTTCCAGCATGAAATTG SEO ID NO: 360 At3g15500 GATGGGTCTCCAAGAGCTTGACCCGTTAGC SEO ID NO: 361 AATAAACCCGAACCCACTAGATTGTTGACC SEO ID NO: 362 At3g15510 GATGGAGAGCACCGATTCTTCCGGTGGTCC SEO ID NO: 363 AGAAGAGTACCAATTTAAACCGGGTAATTG SEO ID NO: 364 At3g18550 ATGAACAACAACATTTTCAGTACTAC SEO ID NO: 365 ACTGTGTATAGCTTTAGATAAAACC SEO ID NO: 366 At3g20770 GATGATGTTTAATGAGATGGGAATGTGTGG SEO ID NO: 367 GAACCATATGGATACATCTTGCTGCTTCTG SEO ID NO: 368 At3g23220 ATGAAATACAGAGGCGTACGAAAG SEO ID NO: 369 GCGGTTTGCGTCGTTACAATTG SEO ID NO: 370 At3g23230 ATGGAGAGCTCAAACAGGAGC SEO ID NO: 371 TCTCTTCCTTTCTTCTGAATCAAG SEO ID NO: 372 At3g23240 CATGGATCCATTTTTAATTCAGTCC SEO ID NO: 373 CCAAGTCCCACTATTTTCAGAAG SEO ID NO: 374 At3g25890 ATGGCTGAACGAAAGAAACGC SEO ID NO: 375 TGGGCACGCGATATTAAGAGG SEO ID NO: 376 - 31 [0078] At3g27920 IGATGAGAATAAGGAGAAGAGATGAAAAAGA SEO ID NO: 377 AAGGCAGTACTCAACATCACCAGAAGCAAA SEO ID NO: 378 At3g28910 GATGGTGAGGOOTOOTTGTTGTGAOAAAGG SEO ID NO: 379 GAAGAAATTAGTGTTTTOATOOAATAGAAT SEO ID NO: 380 At3g29035 GATGGATTACAAGGTATCAAGAAG SEO ID NO: 381 GAATTTOOAAAOOOAATOAAGATTO SEO ID NO: 382 At3g45150 ATGGATTOOAAAAATGGAATTAAO SEO ID NO: 383 AAOTGTGGTTGTGGOTGTTGTTG SEO ID NO: 384 At3g49850 GATGGGAGOTOOAAAGOTGAAGTGGAOAOO SEO ID NO: 385 OOOAGTTTGGOTATGOATTOTATAOTTOAO SEO ID NO: 386 At3g54320 ATGAAGAAGOOOTTAAOOAOTTO SEO ID NO: 387 GAOOAAATAGTTAOAAGAAAOOOAG SEO ID NO: 388 At3g61910 GATGAAOATATOAGTAAAOOOAOAGTOAOA SEO ID NO: 389 TOOAOTAOOOTTOAAOAAGTGGOATGTOOT SEO ID NO: 390 At4g01060 GATGGATAAOOATOOOAGGAOTAAGOAAOO SEO ID NO: 391 ATTTTTOATGAOOOAAAAOOTOTOAATTTO SEO ID NO: 392 At4gOlSSO GATGGTGAAAGATOTGGTTGGG SEO ID NO: 393 TOTOTOOOOATOAAAOTTOATOOO SEO ID NO: 394 At4g18390 ATGATTGGAGATOTAATGAAG SEO ID NO: 395 GTTOTTGOOTTTAOOOTTATG SEO ID NO: 396 At4g18450 ATGGOTTTTGGOAATATOOAAG SEO ID NO: 397 AAAAGAAGATAATAAOOTOTOO SEO ID NO: 398 At4g23750 ATGGAAGOOOAGAAGAAAATGG SEO ID NO: 399 AAOAGOTAAAAGAGGATOOOAO SEO ID NO: 400 At4g26150 GATGGGTTOOAATTTTOATTAOAOAATAGA SEO ID NO: 401 OOOOTGAAOOATTOOOTGOOATAGAGOOAT SEO ID NO: 402 At4g27950 ATGATGATGGATGAGTTTATGGATO SEO ID NO: 403 OAOAAGTAAGAGATOOOATATO SEO ID NO: 404 At4g28140 ATGGAOTTTGAOOAGGAGOTAAATO SEO ID NO: 405 AAAGAAAGGOOTOATAGGAOAAG SEO ID NO: 406 At4g28530 GATGGGTTTGAAAGATATTGGGTOO SEO ID NO: 407 TTGGAAAGOOAGGATATTTTOOOTO SEO ID NO: 408 At4g31060 ATGOOAOOOTOTOOTOOTAAATO SEO ID NO: 409 GTTTATOOAATOAATGTOOATOATG SEO ID NO: 410 At4g31270 GATGGAGGAAGGAAOTTOAGGTTOAOOOAG SEO ID NO: 411 OTOOATTTOTTGTGGAAOTTOATGAAGOOT SEO ID NO: 412 At4g32800 ATGGOOOATTOOTOTTOOOAO SEO ID NO: 413 GGGAAAATGTTTOOAAGATTOO SEO ID NO: 414 At4g34410 ATGOATTATOOTAAOAAOAGAAOO SEO ID NO: 415 OTGGAAOATATOAGOAATTGTATTTO SEO ID NO: 416 At4g35580 GATGOTGOAGTOTGOAGOAOOAGAG SEO ID NO: 417 TGAAOTOAOOAGTGTOOTOOATATAO SEO ID NO: 418 At4g36160 GATGGAATOOOTGGATOAATOATGTAGTGT SEO ID NO: 419 AAOATGTAAATOOOTATATAAGTOATAGTO SEO ID NO: 420 At4g37750 ATGAAGTOTTTTTGTGATAATGATG SEO ID NO: 421 AGAATOAGOOOAAGOAGOOAAAAOOOO SEO ID NO: 422 At4g38620 GATGGGAAGGTOAOOOTGOTGTGAGAAAGO SEO ID NO: 423 TTTOATOTOOAAGOTTOOAAAGOOOAAAAG SEO ID NO: 424 At4g39780 ATGGOAGOOATAGATATGTTOAATAGO SEO ID NO: 425 AGATTOOOAOAATTTGOTAATOOO SEO ID NO: 426 At5g02460 GATGGTTTTTTOTTOATTTOOTAOTTATOO SEO ID NO: 427 TATATTGOTAGTAGAAGAAGAAOTGAAATT SEO ID NO: 428 At5g06100 GATGAGTTAOAOOAGOAOTGAOAGTGAOOA SEO ID NO: 429 AOAAAOTATTTOAAGTGATGGTAAGGTGAA SEO ID NO: 430 At5g07310 ATGGOOAATTOAGGAAATTATGG SEO ID NO: 431 AAAAOOAGAATTAGGAGGTGAAG SEO ID NO: 432 At5g07580 ATGGOOAGTTTTGAGGAAAGO SEO ID NO: 433 AAATGOATOAOAGGAAGATGAAG SEO ID NO: 434 At5g07680 GATGGATTTGOOTOOTGGTTTTAG SEO ID NO: 435 GTAATTOOAGAAAGGTTOAAGATO SEO ID NO: 436 At5g07690 GATGTOAAGAAAGOOATGTTGTGTGGGAGA SEO ID NO: 437 TATGAAGTTOTTGTOOTOOTAATOTTGGOT SEO ID NO: 438 At5g08070 ATGGGAATAAAAAAAGAAGATOAG SEO ID NO: 439 OTOOATATGGTOTGGTTGTGAG SEO ID NO: 440 At5g08790 GATGAAGTOOOAGOTAAATTTAOOAGOTGG SEO ID NO: 441 OOOOTGTGGAGOAAAAOTOOAATTOAAGAA SEO ID NO: 442 At5g09330 GATGGGGAAAAOTOAAOTOOOTOOTGGATT SEO ID NO: 443 OATTTTTGGTOTATGTOTOATGGAAGOAGA SEO ID NO: 444 At5g13180 GATGGATAATGTOAAAOTTGTTAAGAATGG SEO ID NO: 445 TOTGAAAOTATTGOAAOTAOTGGTOTOTTO SEO ID NO: 446 At5g13330 ATGGTOTOOOOTOTOAGOOO SEO ID NO: 447 TTOTOTTGGGTAGTTATAATAATTG SEO ID NO: 448 At5g13910 ATGAAOAOAAOATOATOAAAGAGO SEO ID NO: 449 GGAGOOAAAGTAGTTGAAAOOTTG SEO ID NO: 450 At5gl4000 GATGGAGGTGGAGAAGAGGATTGTAG SEO ID NO: 451 OTOATOAGOTGAGGTAGGAGGAG SEO ID NO: 452 At5g18270 GATGGOOOTTGTGGTTGAAGAAGG SEO ID NO: 453 GAAGTOOOAOAAGTOOOOOOTO SEO ID NO: 454 At5g18560 ATGGGTTTTGOTOTGATOOAOO SEO ID NO: 455 AAAGAOTGAGTAGAAGOOTGTAG SEO ID NO: 456 At5g18830 GATGTOTTOTOTGTOOOAATOOOOAOOAOO SEO ID NO: 457 AATTTTGTGTAOOAATOTOATTOOOATTGO SEO ID NO: 458 At5g22290 GATGGAOAOOAAGGOOOTTGGAGTTTO SEO ID NO: 459 TTOTAGATAAAAOAAOATTGOTATO SEO ID NO: 460 At5g22380 GATGGOOOATGAGGTOAOAATOOOOTTTOO SEO ID NO: 461 AGGOOAAGTOAGOTGTTOOOAGTOOOAOAT SEO ID NO: 462 At5g23260 GATGGGTAGAGGGAAGATAGAGATAAAGAA SEO ID NO: 463 ATOATTOTGGGOOOTTGGATOOTTTTGAAG SEO ID NO: 464 At5g24520 GATGGATAATTOAGOTOOAGATTOOTTATO SEO ID NO: 465 AAOTOTAAGGAGOTGOATTTTGTTAGOAAA SEO ID NO: 466 At5g24590 GATGAAAGAAGAOATGGAAGTAOTATO SEO ID NO: 467 TGOOAOTAGAOTGOAGAOOOAOATO SEO ID NO: 468 At5g25190 ATGGOAOOAOOAOAAOAAOOO SEO ID NO: 469 OAGOOTOTGAGTTGGTAAAAOAG SEO ID NO: 470 At5g25390 ATGGTAOATTOOAAGAAGTTOOO SEO ID NO: 471 GAOOTGTGOAATGGATOOAG SEO ID NO: 472 At5g25810 ATGATAGOTTOAGAGAGTAOOAAG SEO ID NO: 473 ATAATTATAOAGTOOTTGAAGATOOO SEO ID NO: 474 At~g3555O GATGGGAAAGAGAGOAAOTAOTAGTGTGAG SEO ID NO: 475 AOAAGTGAAGTOTOOOAGOOAATOTTOATO SEO ID NO: 476 At5g39610 GATGGATTAOOAGGOATOAAGAATO SEO ID NO: 477 GAAATTOOAAAOOOAATOOAATTO SEO ID NO: 478 At5g40330 ATGAGAATGAOAAGAGATGGAAAAG SEO ID NO: 479 AAGGOAATAOOOATTAGTAAAATOOATOATAG SEO ID NO: 480 At5g41030 ATGGTOATGGAGOOOAAGAAG SEO ID NO: 481 TGAAOOATTTTOOTOTGOAOTO SEO ID NO: 482 At5g43270 IGATGGAGTGTAATGOAAAGOOAOOOTTTOA ISEO ID NO: 483 IGTTATAAAAOTGGTTOAAGOTGAAGTAGTT ISEO ID NO: 484 At5g47220 IGATGTAOOOAOAGTGOAATATAGAATOOO ISEO ID NO: 485 ITGAAAOOAATAAOTOATOAAOAOOTGT ISEO ID NO: 486 - 32 [0079] At5g47230 GGGGATGGCGACTCCTAACGAAGT SEQ ID NO: 487 AACAACGGTCAACTGGGAATAACCAAACG SEQ ID NO: 488 At5g47390 GATGACTCGTCGATGTTCTCACTGCAATCA SEQ ID NO: 489 TAAAGCGTGTATCACGCTTTTGATGTCTGA SEQ ID NO: 490 At5g51190 ATGGCTTCTTCACATCAACAACAG SEQ ID NO: 491 AGTAACTACGAGTTGAGAGTGTC SEQ ID NO: 492 At5g52020 ATGTCGAATAATAATAATTCTCCGAC SEQ ID NO: 493 TTTATAACTCCAAAGATTATCTCCTTC SEQ ID NO: 494 At5g53290 ATGGACGAATATATTGATTTCCGAC SEQ ID NO: 495 AGCAACTAATAGATCTGATATCAATG SEQ ID NO: 496 At5g54230 GATGGGAAAATCTTCAAGCTCGGAGGAAAG SEQ ID NO: 497 TGATAGATTCAAAGCATTATTATTATGATC SEQ ID NO: 498 At5g58900 GATGGAGGTTATGAGACCGTCGACGTCACA SEQ ID NO: 499 TAGTTGAAACATTGTGTTTTGGGCGTCATA SEQ ID NO: 500 At5g60970 ATGAGATCAGGAGAATGTGATG SEQ ID NO: 501 AGAATCTGATTCATTATCGCTAC SEQ ID NO: 502 At5g61600 ATGGCAACTAAACAAGAAGCTTTAG SEQ ID NO: 503 AGTGACGGAGATAACGGAAAAG SEQ ID NO: 504 At5g62380 GATGGAAAGTCTCGCACACATTCCTCCCGG SEQ ID NO: 505 CGTGTGTGTATTTTGAGCCCAAGAGTAGAA SEQ ID NO: 506 At5g64530 GATGAATCTACCACCGGGATTTAGG SEQ ID NO: 507 CGGTAAGCTTACTTCGTCAAGATC SEQ ID NO: 508 At5g64750 ATGTGTGTCTTAAAAGTGGCAAATC SEQ ID NO: 509 GGAGGATGGACTATTATTGTAG SEQ ID NO: 510 At5g66300 GATGATGAAGGTTGATCAAGATTATTCGTG SEQ ID NO: 511 GTCTTCTCCACTCATCAAAAATTGAGACGC SEQ ID NO: 512 At5g67000 ATGGATAATTCAGAAAATGTTC SEQ ID NO: 513 TCTCCACCGCCGTTTAATTC SEQ ID NO: 514 At5g67300 GATGGCTGATAGGATCAAAGGTCCATGGAG SEQ ID NO: 515 CTCGATTCTCCCAACTCCAATTTGACTCAT SEQ ID NO: 516 At5g67580 GATGGGTGCACCAAAGCAGAAGTGGACACC SEQ ID NO: 517 CCAAGGATGATTACGGATCCTGAACTTCAA SEQ ID NO: 518 [0080] Production of improved transcription factors 5 In order to add a repressor domain sequence to the 3' terminal of a transcription factor gene encoded by the above DNA fragment, p35SSXG, which is a vector having an SmaI site and a repressor domain sequence (amino acid sequence: GLDLDLELRLGFA (SEQ ID NO: 519)) downstream of a CaMV35S promoter, was used. In order to link a transcription factor gene sequence and a repressor domain 10 sequence, p35SSXG was cleaved with SmaI. Each PCR amplification fragment encoding the relevant transcription factor obtained above was separataely inserted at the cleavage site. Thus, 180 types vectors (each denoted by p35SSXG(TFs)) were produced. Here, each vector is denoted by p35SSXG(TFs), provided that "TFs" represents the AGI code for each transcription factor. For example, a vector having the 15 transcription factor specified by At3g04070 is denoted by p35SSXG(At3g04070). Also, in the descriptions below, "TFs" is used in a similar manner to denote vectors and the like. [0081] Construction of improved transcription factor expression vectors 20 pBCKH was used as a binary vector for gene introduction into plants with Agrobacterium. This vector was obtained by incorporating a casset of the Gateway vector conversion system (Invitrogen) into the HindIll site of pBIG(Hygr) (Nucleic - 33 Acids Res. 18,203 (1990)). In order to incorporate an improved transcription factor gene sequence into the vector, 180 types of p35SSXG(TFs) were each separately mixed with the vector, followed by a recombination reaction using GATEWAY LR clonase (Invitrogen). Thus, 180 types of vectors (each denoted by pBCKH-p35SSXG(TFs)) 5 were produced. [0082] Introduction of improved transcription factor gene expression vectors into plants Arabidopsis thaliana (Columbia (Col-0)) was used as a plant for introduction of an improved transcription factor. Gene introduction was carried out in accordance 10 with "Transformation of Arabidopsis thaliana by vacuum infiltration" (http://www.bch.msu.edu/pamgreen/protocol.htm). Note that each plant was infected only by immersing it in an Agrobacterium bacterial liquid without conducting depressurization treatment. Specifically, an improved transcription factor expression vector (pBCKH-p35SSXG(TFs)) was introduced into the soil bacterium (Agrobacterium 15 tumefaciens) strain (GV3101 (C58ClRifr) pMP90 (Gmr), Koncz and Schell 1986)) by electroporation. For each vector, gene-transfected bacterial cells were cultured in 1 liter of a YEP medium containing antibioitics (kanamycin (Km): 50 [tg/ml; gentamicin (Gm): 25 [tg/ml; and rifampicin (Rif): 50 [tg/ml)) until OD600 became 1. Subsequantly, bacterial cells were recovered from each culture solution and suspended in 1 liter of an 20 infection medium (an infiltration medium containing 2.2 g of an MS salt, 1X B5 vitamins, 50 g of sucrose, 0.5 g of MES, 0.044 pM of benzylaminopurine, and 400 pl of Silwet per litter (pH 5.7)). [0083] Arabidopsis thaliana plants cultivated for 14 days were immersed in each solution for 1 minute for infection. Thereafter, the plants were continuously cultivated 25 to result in seed setting. The collected seeds (T1 seeds) were sterilized in a solution containing 50% bleech and 0.02% Triton X-100 for 7 minutes, rinsed 3 times with sterilized water, and seeded on a sterilized hygromycin selection medium (containing a 4.3 g/l MS salt, 0.5% sucrose, 0.5 g/l MES (pH 5.7), 0.8% agar, 30 mg/1 hygromycin, and 250 mg/l vancomycin). Five to ten lines of the transformed plants (T1 plants) 30 growing on the hygromycin plate were selected for each improved transcription gene and transplanted into pots (each with a diameter of 50 mm) containing vermiculite - 34 mixed soil. Then, the plants were cultivated under conditions of 22 0 C for 16 hours in the light and 8 hours in the dark at a light intensity ranging from about 60 to 80 ptE/cm 2 Thus, seeds (T2 seeds) were obtained. [0084] 5 Analysis of T2 seeds T2 seeds from 5 to 10 lines of transformants prepared via transfecion with 180 types of TFs-SRDXs were analyzed for fat and oil content. Arabidopsis thaliana seeds (2 to 10 mg each) were subjected to quantitative analysis of fats and oils using MARAN-23 (ResonanceInsturuments Ltd., UK) H-NMR and analysis software (RI 10 NMR Ver. 2.0). Olive oil was used as a fat and oil reference substance to create a calibration curve for determination of the fat and oil content in seeds (% by weight). [0085] Tables 4 to 6 summarize the analysis results of the fat and oil content in T2 seeds for the transformants obtained via transfection with the relevant TFs-SRDX genes.

- 35 [Table 4] AGI code Genes Fat and oil content Standard P value (t-test) (average) deviation WT(Col-0) WT(Col-0) 34.9% 3.8% At1g56650 At1g56650-SRDX 41.3% 4.7% 0.00% At5g47230 At5g47230-SRDX 40.5% 1.5% 0.00% At1g22985 At1g22985-SRDX 39.3% 3.1% 0.05% At1g80580 At1g80580-SRDX 39.1% 3.3% 0.14% At1g25470 At1 g25470-SRDX 39.0% 2.6% 0.04% At1g67260 At1g67260-SRDX 38.7% 3.4% 0.39% At5g24520 At5g24520-SRDX 38.3% 2.4% 0.15% At1g71030 Atlg7103O-SRDX 38.3% 3.3% 0.57% At4g36160 At4g36160-SRDX 37.9% 3.0% 1.34% At3g15510 At3g15510-SRDX 37.9% 3.3% 2.11% At5g64750 At5g64750-SRDX 37.1% 2.1% 2.03% At5g07580 At5g07580-SRDX 37.1% 3.8% 11.48% At5g61600 At5g61600-SRDX 37.0% 3.7% 13.06% At1g74930 At1g74930-SRDX 37.0% 2.7% 5.61% At2g31230 At2g31230-SRDX 36.7% 1.1% 1.81% At4g01550 At4g01550-SRDX 36.7% 1.0% 1.97% Atig68800 AtI g68800-SRDX 36.6% 2.8% 12.64% At5g51190 At5g5l190-SRDX 36.6% 4.6% 29.97% At5g47390 At5g47390-SRDX 36.5% 3.3% 18.20% Atig24260 AtI g24260-SRDX 36.5% 1.4% 4.63% At5g09330 At5g09330-SRDX 36.5% 1.4% 4.97% At5g40330 At5g40330-SRDX 36.5% 5.8% 41.64% At3g04420 At3g04420-SRDX 36.4% 1.4% 5.24% At3g23240 At3g23240-SRDX 36.3% 4.7% 37.70% At5g18560 At5g18560-SRDX 36.3% 3.2% 24.67% At3g23220 At3g23220-SRDX 36.3% 1.9% 13.44% Atlg1O200 Atlg1O200-SRDX 36.1% 1.2% 16.57% At5g25810 At5g25810-SRDX 36.0% 1.4% 16.19% At5g24590 At5g24590-SRDX 35.9% 1.9% 23.99% At1g15360 At1g15360-SRDX 35.8% 5.0% 60.12% At4g31270 At4g31270-SRDX 35.8% 2.1% 33.95% At3g11280 At3g 1280-SRDX 35.7% 3.2% 48.17% At2g40220 At2g40220-SRDX 35.7% 1.8% 32.94% At2g46310 At2g46310-SRDX 35.6% 1.8% 39.17% At1g72570 At1g72570-SRDX 35.6% 1.6% 37.63% At2g44840 At2g44840-SRDX 35.6% 1.8% 43.45% At3g45150 At3g45150-SRDX 35.5% 5.7% 75.03% At5g67300 At5g67300-SRDX 35.4% 2.6% 59.92% At3g14230 At3g14230-SRDX 35.4% 2.8% 63.53% At4g27950 At4g27950-SRDX 35.3% 2.1% 65.97% At5g25190 At5g25190-SRDX 35.3% 3.7% 77.19% At2g42400 At2g42400-SRDX 35.3% 1.7% 64.86% At5gO6100 At5gO6100-SRDX 35.2% 1.1% 68.48% At5g67000 At5g67000-SRDX 35.2% 1.7% 72.40% At5g64530 At5g64530-SRDX 35.2% 1.4% 70.59% At3g05760 At3g05760-SRDX 35.1% 4.8% 89.74% At1g63910 At1g63910-SRDX 35.1% 2.4% 82.95% At5g35550 At5g35550-SRDX 35.0% 1.7% 86.61% At3g61910 At3g61910-SRDX 35.0% 5.6% 94.10% At4g37750 At4g37750-SRDX 34.8% 2.4% 98.10% At1g24590 At1g24590-SRDX 34.8% 3.4% 96.18% At5g23260 At5g23260-SRDX 34.8% 1.6% 94.23% At1g78080 At1g78080-SRDX 34.8% 1.1% 92.81% At2g22200 At2g22200-SRDX 34.8% 3.1% 92.51% At5g08790 At5g08790-SRDX 34.7% 2.2% 89.22% Atig43640 AtI g43640-SRDX 34.7% 1.8% 86.52% At1g79180 At1g79180-SRDX 34.7% 2.1% 84.04% At5g25390 At5g25390-SRDX 34.7% 1.7% 81.22% At2g28550 At2g28550-SRDX 34.6% 2.6% 82.85% At4g39780 At4g39780-SRDX 34.6% 2.1% 79.62% At5g39610 At5g39610-SRDX 34.5% 3.6% 80.18% - 36 [Table 5] AGI code Genes Fat and oil Standard P value (t-test) I content (average) deviation At4g23750 At4g23750-SRDX 34.5% 3.3% 77.60% At4g35580 At4g35580-SRDX 34.5% 2.4% 67.37% At2g33480 At2g33480-SRDX 34.4% 2.2% 64.16% At3g02310 At3g02310-SRDX 34.4% 1.9% 57.72% At4g34410 At4g34410-SRDX 34.3% 4.2% 71.90% At5g58900 At5g58900-SRDX 34.3% 2.8% 59.57% At5g53290 At5g53290-SRDX 34.2% 2.9% 52.74% Atlg01010 Atig01010-SRDX 34.1% 1.3% 34.04% At3g25890 At3g25890-SRDX 34.1% 2.2% 43.34% Atlg67780 Atlg67780-SRDX 34.1% 2.8% 48.95% Atlg63040 Atlg63040-SRDX 34.1% 2.0% 38.51% At1g52890 At1g52890-SRDX 34.0% 1.7% 29.38% At4g31060 At4g31060-SRDX 33.9% 2.9% 40.19% Atlg53230 Atlg53230-SRDX 33.9% 3.0% 40.84% At1g27370 At1g27370-SRDX 33.9% 2.8% 37.54% Atl1g2980 Atl1g2980-SRDX 33.9% 2.2% 29.35% At5g67580 At5g67580-SRDX 33.9% 3.4% 42.60% At1g17520 At1g17520-SRDX 33.8% 2.8% 34.90% At2g33710 At2g33710-SRDX 33.8% 1.9% 23.88% At3g28910 At3g28910-SRDX 33.8% 5.2% 54.42% At2g26060 At2g26060-SRDX 33.8% 1.5% 17.87% Atlg77200 Atlg77200-SRDX 33.7% 2.3% 25.47% At3g23230 At3g23230-SRDX 33.7% 4.6% 47.57% Atlg64380 Atlg64380-SRDX 33.6% 3.6% 34.06% Atlg43160 Atlg43160-SRDX 33.6% 2.1% 17.39% At1g28160 At1g28160-SRDX 33.6% 3.1% 27.37% At2g35700 At2g35700-SRDX 33.5% 2.0% 14.13% At3g29035 At3g29035-SRDX 33.5% 1.6% 10.20% At2g44940 At2g44940-SRDX 33.5% 2.2% 15.44% Atlg14510 Atlg14510-SRDX 33.5% 3.6% 29.60% Atlg56010 Atlg56010-SRDX 33.4% 5.4% 43.55% At5g41030 At5g4lO3O-SRDX 33.4% 3.4% 25.95% At2g41710 At2g41710-SRDX 33.4% 3.0% 20.11% Atlg34190 Atlg34190-SRDX 33.3% 2.8% 15.19% Atlg61110 Atlg61110-SRDX 33.3% 2.5% 12.63% At2g45680 At2g45680-SRDX 33.2% 3.0% 16.92% At1g28520 At1g28520-SRDX 33.2% 2.3% 9.64% At5g13910 At5g1391O-SRDX 33.2% 3.4% 18.79% At3gO530 At3gOl 530-SRDX 33.2% 4.1% 24.65% At5g22290 At5g22290-SRDX 33.1% 2.4% 7.40% At5g18270 At5g18270-SRDX 33.0% 3.0% 11.81% At2g30470 At2g30470-SRDX 33.0% 1.8% 3.80% Atlg18570 Atlg18570-SRDX 33.0% 2.6% 8.10% At5g07680 At5g07680-SRDX 33.0% 2.7% 8.13% At2g17040 At2gl 7040-SRDX 33.0% 1.8% 3.26% At5g07690 At5g07690-SRDX 32.9% 2.2% 4.47% At3g54320 At3g54320-SRDX 32.9% 2.3% 5.12% At3g15500 At3gl 5500-SRDX 32.9% 1.9% 2.97% At2g30420 At2g30420-SRDX 32.9% 1.4% 1.51% At3g09600 At3g09600-SRDX 32.8% 1.6% 1.71% Atlg36060 Atlg36060-SRDX 32.8% 2.2% 3.25% AtlgO1250 AtgOl250-SRDX 32.7% 1.7% 1.53% Atlg25580 Atlg25580-SRDX 32.7% 2.1% 2.46% At5g54230 At5g54230-SRDX 32.7% 3.0% 6.49% At3g20770 At3g20770-SRDX 32.7% 2.4% 3.36% Atl1g2890 Atlg12890-SRDX 32.7% 2.0% 2.03% At1g60240 At1g60240-SRDX 32.6% 4.5% 15.84% - 37 [Table 6] AGI code Genes Fat and oil content Standard P value (t-test) (average) deviation At4g28530 At4g28530-SRDX 32.5% 3.5% 7.11% At4g18450 At4g18450-SRDX 32.4% 4.3% 8.56% At2g47520 At2g47520-SRDX 32.4% 3.3% 5.10% At2g18060 At2gl8060-SRDX 32.4% 1.8% 0.61% At4g18390 At4g18390-SRDX 32.3% 2.1% 1.03% At5g08070 At5g08070-SRDX 32.3% 1.9% 0.59% At1g76580 At1g76580-SRDX 32.2% 2.2% 0.84% At4g28140 At4g28140-SRDX 32.2% 2.9% 2.15% At5g60970 At5g60970-SRDX 32.1% 2.2% 0.69% At2g42830 At2g42830-SRDX 32.1% 3.2% 2.52% Atlg30210 Atlg302lO-SRDX 32.1% 2.8% 1.61% Atlg71450 Atlg71450-SRDX 32.1% 2.4% 0.89% Atlg09540 Atlg09540-SRDX 32.1% 1.8% 0.26% At3g10490 At3g10490-SRDX 32.0% 2.5% 0.72% At1g62700 At1g62700-SRDX 32.0% 1.9% 0.21% Atlg49120 Atlg49120-SRDX 31.9% 2.3% 0.44% Atla44830 Atla44830-SRDX 31.9% 3.2% 1.84% Atlg30810 Atlg308lO-SRDX 31.8% 2.2% 0.31% At1g74840 At1g74840-SRDX 31.8% 3.2% 1.35% At5g18830 At5g18830-SRDX 31.8% 1.8% 0.09% Atlg72360 Atlg72360-SRDX 31.4% 2.0% 0.04% At1g32770 At1g32770-SRDX 31.3% 1.9% 0.03% At5g14000 At5gl4000-SRDX 31.3% 2.1% 0.05% At2g23290 At2g23290-SRDX 31.3% 2.8% 0.21% At2g02450 At2g02450-SRDX 31.1% 2.3% 0.04% At1g27360 At1g27360-SRDX 31.0% 2.3% 0.03% At1g33760 At1g33760-SRDX 31.0% 2.1% 0.02% At3a27920 At3a27920-SRDX 30.9% 2.1% 0.01% At3g18550 At3g18550-SRDX 30.8% 2.9% 0.08% At1g52880 At1g52880-SRDX 30.8% 3.4% 0.23% At5g07310 At5g07310-SRDX 30.7% 2.3% 0.01% At4g26150 At4g26150-SRDX 30.6% 2.0% 0.00% Atl1g9490 Atl1g9490-SRDX 30.6% 2.3% 0.01% At1g52150 At1g52150-SRDX 30.6% 1.5% 0.00% At3g04060 At3g04060-SRDX 30.5% 3.1% 0.07% At4g32800 At4g32800-SRDX 30.5% 2.8% 0.03% At5g66300 At5g66300-SRDX 30.5% 2.1% 0.00% At5g13180 At5g13180-SRDX 30.5% 5.5% 2.41% At1g71692 At1g71692-SRDX 30.5% 2.9% 0.03% Atlg27730 Atlg27730-SRDX 30.4% 1.4% 0.00% At3g49850 At3g49850-SRDX 30.1% 1.3% 0.00% At3g02150 At3gO2l5O-SRDX 30.1% 2.8% 0.02% At5g47220 At5g47220-SRDX 30.0% 4.9% 0.60% At5g43270 At5g43270-SRDX 29.7% 2.1% 0.00% At5g52020 At5g52020-SRDX 29.7% 2.1% 0.00% At1g69490 At1g69490-SRDX 29.6% 4.8% 0.28% At4g38620 At4g38620-SRDX 29.4% 4.1% 0.05% At2g45650 At2g45650-SRDX 29.2% 1.3% 0.00% At5g02460 At5g02460-SRDX 29.0% 1.6% 0.00% At1g12260 At1g12260-SRDX 28.9% 2.9% 0.00% At5g13330 At5g13330-SRDX 28.7% 3.6% 0.00% At4gOl060 At4gO1060-SRDX 28.5% 3.0% 0.00% At2a46590 At2a46590-SRDX 28.5% 2.4% 0.00% At1g69120 At1g69120-SRDX 28.3% 3.2% 0.00% At1g77450 At1g77450-SRDX 28.1% 6.1% 0.17% At2g23760 At2g23760-SRDX 28.0% 2.4% 0.00% At2g02070 At2g02070-SRDX 27.9% 2.4% 0.00% At1g22640 At1g22640-SRDX 27.8% 2.2% 0.00% At1g18330 At1g18330-SRDX 27.6% 4.0% 0.00% At5g22380 At5g22380-SRDX 27.5% 5.1% 0.01% At5g62380 At5g62380-SRDX 26.0% 3.7% 0.00% At3g04070 At3g04070-SRDX 25.2% 3.5% 0.00% - 38 [0086] The fat and oil content in fructified seeds was found to be 34.9 ± 3.8% for 33 untransfected control WT(Col-0) individuals. Meanwhile, the average fat and oil content in T2 seeds was found to be 25.2% to 41.3% for the transformants each overexpressing a chimeric protein comprising a different one of the 180 types of 5 transcription factors fused with SRDX. For a comparison of the obtained average value with the average fat and oil content for the wild-type strain, a t-test was performed. Accordingly, T2 seeds expressing chimeric proteins from 15 lines (accounting for 8.3% of the analyzed transcription factors) were found to exhibit a significant increase in the fat and oil content (P < 0.05). Meanwhile, T2 seeds expressing chimeric proteins from 10 70 lines (accounding for 38.9% of the analyzed transcription factors) were found to exhibit a significant decrease in fat and oil content (P < 0.05). That is, expression of approximately 47.2% of chimeric proteins caused an increase or decrease in fat and oil content. In other words, about more than half of the transcription factors (e.g., At5g40330, At4g23750, and At5g18270) examined herein substantially do not influence 15 the fat and oil content in seeds even when a chimeric protein comprising such a transcription factor and a repressor domain is expressed. [0087] In this Example, each of the following 11 types of transcription factors was newly identified as a transcription factor capable of functioning to improve the fat and oil content in seeds when a chimeric protein comprising the transcription factor fused 20 with a repressor domain was expressed: At5g47230, At1g22985, At1g80580, At1g25470, At1g67260, At4g36160, At5g64750, At4g01550, At1g24260, At5g09330, and At2g31230. Also in this Example, each of the following 68 types of transcription factors was newly identified as a transcription factor capable of functioning to reduce the fat and oil content in seeds when a chimeric protein comprising the transcription factor 25 fused with a repressor domain was expressed: At2g17040, At5g07690, At3g15500, At2g30420, At3g09600, At1g36060, AtlgO1250, At1g25580, At3g20770, At1g12890, At2g18060, At4g18390, At5g08070, At1g76580, At4g28140, At5g60970, At2g42830, Atlg30210, At1g71450, At1g09540, At3g10490, At1g62700, At1g49120, At1g44830, Atlg30810, At1g74840, At5g18830, At1g72360, At1g32770, At5g14000, At2g23290, 30 At2g02450, At1g27360, At1g33760, At3g27920, At3g18550, At1g52880, At5g07310, At4g26150, At1g19490, At1g52150, At3g04060, At4g32800, At5g66300, At5g13180, At1g71692, At1g27730, At3g49850, At3g02150, At5g47220, At5g43270, At5g52020, - 39 At1g69490, At4g38620, At2g45650, At5g02460, At1g12260, At5g13330, At4gO1060, At2g46590, At1g69120, At1g77450, At2g23760, At2g02070, At1g22640, At5g22380, and At5g62380. [0088] As described above, the Examples revealed that the fat and oil contents in seeds 5 can be significantly modified by causing expression of a particular transcription factor fused with a repressor domain. [0089] Production of a At5g22380-expressing strain and analysis of fat and oil content As described above, a DNA fragment of At5g22380 was amplified such that 10 the fragment contained a termination codon. Then, the DNA fragment was ligated downstream of a 35S promoter in the manner described above and the ligation product was introduced into Arabidopsis thaliana. Specifically, an Arabidopsis thaliana transformant capable of expressing At5g22380 (which was in its original state and thus was not fused with SRDX) under the regulation of a constitutive expression promoter 15 was produced for experimentation. The produced Arabidopsis thaliana transformant was subjected to determination of the fat and oil content in T2 seeds in the manner described above. Accordingly, the fat and oil content in T2 seeds was found to be 37.6 + 1.8% for plant individuals expressing At5g22380. Meanwhile, the fat and oil content was found to be 36.3 ± 0.4% for the wild-type strain that had been cultivated in the same 20 period. As a result of a t-test, a significant increase in the fat and oil content was confirmed (P < 0.05). The fat and oil content of the line with the highest fat and oil content was found to be 40.0%, which was 10.3% greater than that of the wild-type strain. [0090] The above experimental results revealed that a transcription factor expressed in a 25 state of being fused with a repressor domain can significantly reduce the fat and oil content in seeds. This strongly suggested that the fat and oil content in seeds can be significantly improved when such transcription factor, which is originally not fused with a repressor domain, is expressed as is (that is to say, expressed under expression regulation by a constitutive expression promoter). Also, the above experimental results 30 revealed that a transcription factor expressed in a state of being fused with a repressor -40 domain can significantly improve the fat and oil content in seeds. This strongly suggested that the fat and oil content in seeds can be significantly reduced when such transcription factor, which is originally not fused with a repressor domain, is expressed as is (that is to say, expressed under expression regulation by a constitutive expression 5 promoter). [0091] All publications, patents, and patent applications cited herein are incorporated herein by reference in their entirety.

Claims

1. A method for improving productivity of fats and oils in seed by causing expression of a chimeric protein obtained by fusing a transcription factor consisting of any one of the following proteins (a) to (c) and a functional peptide capable of 5 converting an arbitrary transcription factor into a transcriptional repressor in a plant: (a) a protein comprising an amino acid listed in the following table; AGI code Nucleotide sequence Amino sequence At1g80580 SEQ ID NO: 5 SEQ ID NO: 6 (b) a protein having transactivation activity and comprising an amino acid sequence that has a deletion, a substitution, an addition, or an insertion of one or a plurality of amino acids with respect to the amino acid sequence listed in 10 the above table; and (c) a protein having transactivation activity encoded by a polynucleotide that hybridizes under stringent conditions to a polynucleotide consisting of a nucleotide sequence complementary to the nucleotide sequence listed in the above table. 15

2. The method according to claim 1, wherein transactivation activity of the transcription factor is repressed.

3. The method according to claim 1, wherein the chimeric protein has transcriptional repressor activity.

4. The method according to claim 1, wherein the functional peptide has an amino 20 acid sequence expressed by any one of the following formulae (1) to (8): (1) X1-Leu-Asp-Leu-X2-Leu-X3 (where X1 denotes a set of 0 to 10 amino acid residues, X2 denotes Asn or Glu, and X3 denotes a set of at least 6 amino acid residues); (2) Y1-Phe-Asp-Leu-Asn-Y2-Y3 (Where Y1 denotes a set of 0 to 10 amino 25 acid residues, Y2 denotes Phe or Ile, and Y3 denotes a set of at least 6 amino acid residues); - 42 (3) Z1-Asp-Leu-Z2-Leu-Arg-Leu-Z3 (where Z1 denotes Leu, Asp-Leu, or Leu-Asp-Leu, Z2 denotes Glu, Gln, or Asp, and Z3 denotes a set of 0 to 10 amino acid residues); (4) Asp-Leu-Z4-Leu-Arg-Leu (where Z4 denotes Glu, Gln, or Asp); 5 (5) al-Leu-01-Leu-yI-Leu; (6) al-Leu- 1-Leu-72-Leu; (7) al-Leu-02-Leu-Arg-Leu; and (8) a2-Leu- 1-Leu-Arg-Leu (where al denotes Asp, Asn, Glu, Gln, Thr, or Ser, a2 denotes Asn, Glu, Gln, 10 Thr, or Ser, 0 1 denotes Asp, Gln, Asn, Arg, Glu, Thr, Ser, or His, 32 denotes Asn, Arg, Thr, Ser, or His, 71 denotes Arg, Gln, Asn, Thr, Ser, His, Lys, or Asp, and 72 denotes Gln, Asn, Thr, Ser, His, Lys, or Asp in formulae (5) to (8)).

5. The method according to any one of claims 1 to 4, wherein the plant is an angiosperm. 15

6. The method according to any one of claims 1 to 4, wherein the plant is a dicotyledon.

7. The method according to any one of claims 1 to 4, wherein the plant is a cruciferous plant.

8. The method according to any one of claims 1 to 4, wherein the plant is 20 Arabidopsis thaliana. 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 2013273650 18 Dec 2013 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