黄色および白色系クレマチス品種のフラボノール配糖体とその花色への貢献

概要

論文の詳細を見る
The flower pigments in two yellow Clematis cultivars, "Gekkyuden" and "Manshu-ki", and yellow flower type of C. patens collected in Korea, were characterized. They were compared with those of three white Clematis florida varieties, var. florida, var. florepleno and var. sieboidiana. It was shown by UV-visible spectral survey of crude MeOH extract of their sepals that carotenoid pigment is apparently absent from yellow flowers. High performance liquid chromatographical and paper chromatographical survey of the flower pigments showed the presence of the flavonol glycosides. They were isolated and characterized by UV spectroscopy, acid hydrolysis, LC-MS, and direct HPLC and TLC comparisons with authentic samples. Quercetin 3-O-galactoside (6) and 3-O-glucoside (7) were isolated from two yellow cultivars and a yellow flower type of C. patens as major components together with minor quercetin 3-O-rutinoside (8). On the other hand, kaempferol 3-O-rutinoside (9) and 3-O-glucoside (4) were detected in the white C. florida varieties as major compounds. From the results described above, it was clear for the first time that yellow flower color of Clematis cultivars are due to much amount of quercetin glycosides. However, it was shown that kaempferol glycoside do not act as yellow pigments, even if they were abundantly accumulated. Apart from those results, the flavonol glycosides of C. armandii flowers were also isolated and identified as quercetin 3-O-rutinoside-7-O-glucoside (1), kaempferol 3,7-di-O-glucoside (2), kaempferol 3-O-galactoside (3), kaempferol 3-O-glucoside (4), kaempferol 3-O-glucuronide (5), quercetin 3-O-galactoside (6), quercetin 3-O-glucoside (7), Quercetin 3-O-rutinoside (8) and kaempferol 3-O-rutinoside(9).

黄色および白色系クレマチス品種のフラボノール配糖体とその花色への貢献

スポンサーリンク

概要

著者

関連論文

スポンサーリンク