Korea Kumho Petrochemical Co., Ltd.

Giltsu Choi

Byongchul Shin

Hankuil Yi

Eric I Johnson

Goh Choi

Mamatha Hanummappa

Eric T Johnson

The invention includes modifiedchalcone synthase (CHS) nucleic acids, which encode a modified chalcone synthase that has alanine instead of cysteine at the 165amino acid ofCHS and either glycine or lysine instead of methionine at the 138amino acid ofCHS. The property of the encoded modifiedCHS is characterized by its dominant-negative inhibition of CHS. The invention also includes plants having at least one cell expressing the modifiedCHS. Such plants are characterized by the decreased content of anthocyanins. The invention also includes vectors comprising at least a portion of the modifiedCHS nucleic acids. The invention also includes methods using such vectors for producing plants having the decreased content of anthocyanins.

Genetic sequences encoding dominant-negative chalcone synthase and uses therefore

The invention includes modified dihydroflavonol 4-reductase (DFR) nucleic acids encoding the modified DFR that has altered amino acid sequences at the substrate specificity determining region. The property of the modified DFR is characterized by its ability to reduce dihydrokaempferol (DHK) preferentially over dihydroquercetin (DHQ), and dihydromyricetin (DHM). The invention also includes plants having at least one cell expressing the modified DFR. Such plants are characterized by the increased content of pelargonidin-based pigments. The invention also includes vectors comprising at least a portion of the modified DFR nucleic acids. The invention also includes methods using such vectors for producing plants having the increased content of pelargonidin-based pigments.

Genetic sequences encoding substrate-specific dihydroflavonol 4-reductase and uses therefor

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Kwangju, South Korea

Giltsu Choi