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甜菜色素和属于类黄酮的花青素在自然界排斥分布,然而我们在甜菜色素代谢类型植物三角梅中发现积累多种类黄酮。为了进一步证实这一现象,本研究对3种白花三角梅(Bougainvillea sp.,Bougainvillea glabra‘A l-ba,’and Bougainvillea‘White Stripe’)中的5种类黄酮(槲皮素、山奈酚、异鼠李素、杨梅素和芹菜素)采用毛细管电泳分析方法进行了调查。结果表明,只有3种类黄酮:槲皮素、山奈酚、异鼠李素被检测出。3个材料中,被探测出来的总黄酮含量最高的是Bougainvillea glabra‘Alba,’1749μg.g-1,Bougainvillea‘White Stripe’1 241μg.g-1以及B.sp1312μg.g-1。被探测出来的3种黄酮中,槲皮素含量最高852~1 114μg.g-1,异鼠李素161~628μg.g-1,而山奈酚之被检测出微量。本研究对于定性定量可食用的三角梅中的类黄酮组成是十分有意义的。甜菜色素和类黄酮在三角梅中的积累关系以及可能的功能本研究也做了讨论。
Beet pigments and anthocyanins belonging to flavonoids are repulsively distributed in nature, however, we have found accumulation of many flavonoids in the sugar beet pigment type Bougainvillea. In order to further confirm this phenomenon, five flavonoids from three Bougainvillea sp., Bougainvillea glabra’A l-ba, ’and Bougainvillea’White Stripe’ (quercetin, kaempferol, Rhamnosus, myricetin and apigenin) were investigated by capillary electrophoresis. The results showed that only three flavonoids: quercetin, kaempferol, isorhamnetin were detected. Of the three materials, the highest content of total flavones detected was Bougainvillea glabra’Alba, ’1749 μg.g-1, Bougainvillea’White Stripe’1 241 μg.g-1 and B. sp1312 μg.g-1. Among the three flavonoids detected, the highest content of quercetin was 852-1 114μg.g-1, and that of isorhamnetin was 161-628μg.g-1, while the detection of trace amounts of kaempferol. This study is of great interest for the qualitative and quantitative edible bouquet of flavonoids in Bougainvillea. The relationship between the accumulation of beet pigments and flavonoids in Bougainvillea and their possible functions are also discussed in this study.