Mihoko Mori

ANTHOCYANINS FROM THE RHIZOME OF RAPHANUS SATIVUS, AND CHANGE IN THE COMPOSITION DURING MATURATION

Four new acylated anthocyanins with three known pigments were isolated from the rhizome of the Chinese red radish (Raphanus sativus cv. Beijing hong xin), and their structures were determined. All of them possessed pelargonidin 3-sophoroside-5-glucoside as a common structure, and each was substituted with one to two aromatic acyl residues, with/without a malonyl residue and with/without a sugar residue. The major aromatic acyl moiety was feruloyl. Most of the pigments were malonylated. The cambium part was richer in polyacylated anthocyanins than the parenchyma part.

Anthocyanin components and mechanism for color development in blue Veronica flowers.

3-Di-p-coumaroylsophoroside-5-malonylglucoside and its demalonyl derivative were isolated from blue petals of Veronica persica Poiret. Blue, violet and purple cells coexist in the petal. These colors might be due to the varying pH of the vacuole between 5 and 7 unit. Only the demalonylated pigment was detected in the blue anthers.