Relationship between the deep coloration and anthocyanins in the skin of "Aki queen" berries [Vitis spp.]
2005
Kitamura, H.(Mie-ken. Agricultural Technical Center, Ureshino (Japan)) | Nakayama, M. | Nishikawa, Y. | Kondou, H. | Koshioka, M. | Hiratsuka, S.
A bright-red colored grape cultivar 'Aki Queen' (Vitis labruscana Bailey) frequently expresses deep color and bears dark-red berries. The typically colored berries are distributed in the range from red to orange hue angle values, while the deep colored berries are distributed in the range from red to purple hue angle values. The deep colored berries tended to contain more than 50 X 10(-6) g.cm(-2) total anthocyanin contents in the skin, and these. contents were higher than those of the typically colored berries. Increase of the total anthocyanin content results in the deep coloration. Among thirteen kinds of anthocyanins identified, peonidin- and cyanidin-type anthocyanins were predominant, as well as malvidin- and petunidin-type anthocyanins, in both colored berries. Composition ratios of malvidin- and petunidin-type anthocyanins increased, and those of peonidin- and cyanidin-type anthocyanins decreased, in the deep colored berries. These composition changes also seem to cause the deep coloration as well as the increase in total pigment content. We could not find co-pigmentation effects of flavonols on the deep coloration.
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