Abstract

Anthocyanin synthesis occurred early during the culture cycle of grape cell suspensions. Dihydroflavonol reductase (DFR) activity and anthocyanin synthesis were found well correlated within this period. Phosphate deprivation leads to a large enhancement in DFR activity with a maximum which was observed earlier than in control medium. An increase in anthocyanin accumulation was also observed in association with a higher degree of peonidin 3-glucoside acylation.

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