Abstract: The purpose of the present invention is to provide a breeding method for a plant having a blue flower color with a simpler blue color development controlling technique, without requiring complex mechanisms for blue color development that have been previously presented and techniques reproducing such mechanisms. Delphinidin-based anthocyanins, in which the both 3? and 5?-positions of the anthocyanin B-ring have been glycosylated, and flavone glycosides or flavonol glycosides as copigment are made to coexist in the cells of flower organ such as petals.

Abstract: Provided are transformed chrysanthemum plants having blue flower color, their self-fertilized progenies or cross-fertilized progenies thereof, a vegetative propagated plants thereof, and a part, a tissue or a cell of the plant body. Anthocyanin 3?,5?-O-glucosyltransferase gene (CtA3?5?GT) derived from Clitoria ternatea and flavonoid 3?,5?-hydroxylase gene derived from Campanula (CamF3?5?H) are coexpressed in chrysanthemum petals.

Abstract: The purpose of the present invention is to provide a breeding method for a plant having a blue flower color with a simpler blue color development controlling technique, without requiring complex mechanisms for blue color development that have been previously presented and techniques reproducing such mechanisms. Delphinidin-based anthocyanins, in which the both 3? and 5?-positions of the anthocyanin B-ring have been glycosylated, and flavone glycosides or flavonol glycosides as copigment are made to coexist in the cells of flower organ such as petals.

Abstract: Provided are transformed chrysanthemum plants having blue flower color, their self-fertilized progenies or cross-fertilized progenies thereof, a vegetative propagated plants thereof, and a part, a tissue or a cell of the plant body. Anthocyanin 3?,5?-O-glucosyltransferase gene (CtA3?5?GT) derived from Clitoria ternatea and flavonoid 3?,5?-hydroxylase gene derived from Campanula (CamF3?5?H) are coexpressed in chrysanthemum petals.

Abstract: Disclosed are: a method for producing a chrysanthemum plant having delphinidin-containing petals using a transcriptional regulatory region for a chrysanthemum-derived flavanone 3-hydroxylase (F3H) gene; and a chrysanthemum plant, a progeny or a vegetative proliferation product of the plant, or a part or a tissue of the plant, the progeny or the vegetative proliferation product, and particularly a petal or a cut flower of the plant. In the method for producing a chrysanthemum plant having delphinidin-containing petals, a flavonoid 3?,5?-hydroxylase (F3?5?H) is caused to be expressed in a chrysanthemum plant using a transcriptional regulatory region for a chrysanthemum-derived flavanone 3-hydroxylase (F3H) gene.

Abstract: Disclosed are a method for controlling flavonoid synthesis in a chrysanthemum plant or non-chrysanthemum plant by genetic recombination technology using a transcriptional regulatory region useful for altering flower color, a method for modifying anthocyanins, a method for producing a chrysanthemum plant or non-chrysanthemum plant containing modified anthocyanins in the petals thereof, and a chrysanthemum plant or non-chrysanthemum plant, progeny thereof, or vegetatively propagated products, part or tissue thereof transformed with the regulatory region. In the method according to the present invention, an expression vector or expression cassette containing a transcriptional regulatory region of perilla anthocyanin 3-acyltransferase gene, such as a nucleic acid containing the nucleotide sequence indicated in SEQ ID NO. 1, or a transcriptional regulatory region of pansy F3?5?H gene, such as the nucleotide sequence indicated in SEQ ID NO. 15, is used.

Abstract: Disclosed are: a method for producing a chrysanthemum plant having delphinidin-containing petals using a transcriptional regulatory region for a chrysanthemum-derived flavanone 3-hydroxylase (F3H) gene; and a chrysanthemum plant, a progeny or a vegetative proliferation product of the plant, or a part or a tissue of the plant, the progeny or the vegetative proliferation product, and particularly a petal or a cut flower of the plant. In the method for producing a chrysanthemum plant having delphinidin-containing petals, a flavonoid 3?,5?-hydroxylase (F3?5?H) is caused to be expressed in a chrysanthemum plant using a transcriptional regulatory region for a chrysanthemum-derived flavanone 3-hydroxylase (F3H) gene.

Abstract: Disclosed are a method for controlling flavonoid synthesis in a chrysanthemum plant or non-chrysanthemum plant by genetic recombination technology using a transcriptional regulatory region useful for altering flower color, a method for modifying anthocyanins, a method for producing a chrysanthemum plant or non-chrysanthemum plant containing modified anthocyanins in the petals thereof, and a chrysanthemum plant or non-chrysanthemum plant, progeny thereof, or vegetatively propagated products, part or tissue thereof transformed with the regulatory region. In the method according to the present invention, an expression vector or expression cassette containing a transcriptional regulatory region of perilla anthocyanin 3-acyltransferase gene, such as a nucleic acid containing the nucleotide sequence indicated in SEQ ID NO. 1, or a transcriptional regulatory region of pansy F3?5?H gene, such as the nucleotide sequence indicated in SEQ ID NO. 15, is used.

Abstract: The present invention provides a protein having the amino acid sequence as shown in SEQ ID NO: 2, 4, 6, 8, 10 or 12 or a protein having a modified amino acid sequence thereof and having an activity of transferring an aromatic acyl group to a sugar residue of a flavonoid; a gene, especially cDNA, encoding the protein; and use thereof. For example, by introducing the above gene into a plant expressing hydroxycinnamate 1-O-glucosyltransferase gene, optionally together with a cDNA encoding a protein having the amino acid sequence as shown in SEQ ID NO: 14, 16 or 18 or a protein having an amino acid sequence derived therefrom by modification and having an activity of glucosylating a hydroxyl group at position 1 of hydroxycinnamic acid, and then expressing the introduced gene(s), it is possible to acylate the sugar residue of flavonoids in flowers of the plant to thereby confer a blue color on the flowers.

Abstract: The present invention provides a protein having the amino acid sequence as shown in SEQ ID NO: 2, 4, 6, 8, 10 or 12 or a protein having a modified amino acid sequence thereof and having an activity of transferring an aromatic acyl group to a sugar residue of a flavonoid; a gene, especially cDNA, encoding the protein; and use thereof. For example, by introducing the above gene into a plant expressing hydroxycinnamate 1-O-glucosyltransferase gene, optionally together with a cDNA encoding a protein having the amino acid sequence as shown in SEQ ID NO: 14, 16 or 18 or a protein having an amino acid sequence derived therefrom by modification and having an activity of glucosylating a hydroxyl group at position 1 of hydroxycinnamic acid, and then expressing the introduced gene(s), it is possible to acylate the sugar residue of flavonoids in flowers of the plant to thereby confer a blue color on the flowers.