A plant comprising a fusion protein comprising a transcription factor and a functional peptide, wherein the transcription factor is any of proteins (a) to (c) below: (a) a protein comprising the amino acid sequence as shown in SEQ ID NO: 2; (b) a protein comprising an amino acid sequence derived from the amino acid sequence as shown in SEQ ID NO: 2 by deletion, substitution, addition, or insertion of 1 to 20 amino acids and having transcription accelerating activity; or (c) a protein encoded by a polynucleotide hybridizing under stringent conditions to a polynucleotide comprising a nucleotide sequence complementary to the nucleotide sequence as shown in SEQ ID NO: 1 and having transcription accelerating activity; and wherein the functional peptide comprises the amino acid sequence represented by any of formulae to below: X1-Leu-Asp-Leu-X2-Leu-X3 wherein X1 represents 0 to 10 amino acid residues; X2 represents Asn or Glu; and X3 represents at least 6 amino acid residues; Y1-Phe-Asp-Leu-Asn-Y2-Y3 wherein Y1 represents 0 to 10 amino acid residues; Y2 represents Phe or Ile; and Y3 represents at least 6 amino acid residues; Z1-Asp-Leu-Z2-Leu-Arg-Leu-Z3 wherein Z1 represents Leu, Asp-Leu, or Leu-Asp-Leu; Z2 represents Glu, Gln, or Asp; and Z3 represents 0 to 10 amino acid residues; Asp-Leu-Z4-Leu-Arg-Leu wherein Z4 represents Glu, Gln, or Asp; α1-Leu-β1-Leu-γ1-Leu; α1-Leu-β1-Leu-γ2-Leu; α1-Leu-β2-Leu-Arg-Leu; and α2-Leu-β1-Leu-Arg-Leu; wherein, in formulae to, α1 represents Asp, Asn, Glu, Gln, Thr, or Ser; α2 represents Asn, Glu, Gln, Thr, or Ser; β1 represents Asp, Gln, Asn, Arg, Glu, Thr, Ser, or His; β2 represents Asn, Arg, Thr, Ser, or His; γ1 represents Arg, Gln, Asn, Thr, Ser, His, Lys, or Asp; and γ2 represents Gln, Asn, Thr, Ser, His, Lys, or Asp. (a) a protein comprising the amino acid sequence as shown in SEQ ID NO: 2; (b) a protein comprising an amino acid sequence derived from the amino acid sequence as shown in SEQ ID NO: 2 by deletion, substitution, addition, or insertion of 1 to 20 amino acids and having transcription accelerating activity; or (c) a protein encoded by a polynucleotide hybridizing under stringent conditions to a polynucleotide comprising a nucleotide sequence complementary to the nucleotide sequence as shown in SEQ ID NO: 1 and having transcription accelerating activity; and wherein the functional peptide comprises the amino acid sequence represented by any of formulae to below: X1-Leu-Asp-Leu-X2-Leu-X3 wherein X1 represents 0 to 10 amino acid residues; X2 represents Asn or Glu; and X3 represents at least 6 amino acid residues; Y1-Phe-Asp-Leu-Asn-Y2-Y3 wherein Y1 represents 0 to 10 amino acid residues; Y2 represents Phe or Ile; and Y3 represents at least 6 amino acid residues; Z1-Asp-Leu-Z2-Leu-Arg-Leu-Z3 wherein Z1 represents Leu, Asp-Leu, or Leu-Asp-Leu; Z2 represents Glu, Gln, or Asp; and Z3 represents 0 to 10 amino acid residues; Asp-Leu-Z4-Leu-Arg-Leu wherein Z4 represents Glu, Gln, or Asp; α1-Leu-β1-Leu-γ1-Leu; α1-Leu-β1-Leu-γ2-Leu; α1-Leu-β2-Leu-Arg-Leu; and α2-Leu-β1-Leu-Arg-Leu; wherein, in formulae to, α1 represents Asp, Asn, Glu, Gln, Thr, or Ser; α2 represents Asn, Glu, Gln, Thr, or Ser; β1 represents Asp, Gln, Asn, Arg, Glu, Thr, Ser, or His; β2 represents Asn, Arg, Thr, Ser, or His; γ1 represents Arg, Gln, Asn, Thr, Ser, His, Lys, or Asp; and γ2 represents Gln, Asn, Thr, Ser, His, Lys, or Asp. X1-Leu-Asp-Leu-X2-Leu-X3 wherein X1 represents 0 to 10 amino acid residues; X2 represents Asn or Glu; and X3 represents at least 6 amino acid residues; Y1-Phe-Asp-Leu-Asn-Y2-Y3 wherein Y1 represents 0 to 10 amino acid residues; Y2 represents Phe or Ile; and Y3 represents at least 6 amino acid residues; Z1-Asp-Leu-Z2-Leu-Arg-Leu-Z3 wherein Z1 represents Leu, Asp-Leu, or Leu-Asp-Leu; Z2 represents Glu, Gln, or Asp; and Z3 represents 0 to 10 amino acid residues; Asp-Leu-Z4-Leu-Arg-Leu wherein Z4 represents Glu, Gln, or Asp; α1-Leu-β1-Leu-γ1-Leu; α1-Leu-β1-Leu-γ2-Leu; α1-Leu-β2-Leu-Arg-Leu; and α2-Leu-β1-Leu-Arg-Leu; wherein, in formulae to, α1 represents Asp, Asn, Glu, Gln, Thr, or Ser; α2 represents Asn, Glu, Gln, Thr, or Ser; β1 represents Asp, Gln, Asn, Arg, Glu, Thr, Ser, or His; β2 represents Asn, Arg, Thr, Ser, or His; γ1 represents Arg, Gln, Asn, Thr, Ser, His, Lys, or Asp; and γ2 represents Gln, Asn, Thr, Ser, His, Lys, or Asp.