Plant polyphenols. 1. Anthocyanin production in the cultivated potato

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Abstract
Six anthocyanidins have been found in the cultivated potato. They occur either as the 5-glucoside 3-rhamnosylglucoside acylated with p-coumaric acid, or as the 3-rhamnosylglucoside. The flavonols myricetin, quercetin and kampferol have been found in flowers of the cultivated potato. The occurrence of these pigments variously in flowers and tubers of 6 color genotypes is described. The effects of the 3 genes controlling anthocyanin production are interpreted in biochemical terms. It is apparent that the processes of methylation, acylation and glycosidation occur sequentially and at a late stage in anthocyanin biosynthesis.