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- W2031074053 abstract "The changes in flavonoids were studies during the growth of Poinsettia bracts. Pelargonidin glycosides appeared after cyanidin glycosides; the 3-rutinoside after the 3-monoglucoside. The 3-mono-glucosides were predominant at all times. The bracts contained kaempferol and quercetin, both as aglycones and glycosides. There was no direct relationship between the pathways of flavonol and anthocyanin biosynthesis, but two separate pathways corresponding to the 4′-monohydroxylated- and 3′,4′-dihydroxylated-, flavonoids. Flavanonols and isoflavones were detected but not characterized. L'évolution des flavonoïdes a été étudiée au cours de la croissance des bractées de Poinsettia. Les anthocyanosides du pélargonidol apparaissent aprés ceux du cyanidol. Le 3-monoglucoside du pélargonidol apparaît avant le 3-rutinoside. Les 3-monoglucosides prédominent à tous les stades. Les bractées renferment du kaempférol et de la quercétine à l'état d'aglycones et de glycosides. Il n'y a pas de relation directe entre flavonols et anthocyanes du point de vue biosynthétique. Il y aurait deux voies de biosynthèse, parallèles, mais sans liens directs, correspondant aux flavonoïdes monohydroxylés en 4′ sur le noyau latéral et aux flavonoïdes dihydroxylés en 3′,4′. La présence de flavanonols et d'isoflavones est reconnue." @default.
- W2031074053 created "2016-06-24" @default.
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- W2031074053 date "1974-12-01" @default.
- W2031074053 modified "2023-09-25" @default.
- W2031074053 title "Evolution des flavonoides au cours de la croissance des bractees de Poinsettia" @default.
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- W2031074053 doi "https://doi.org/10.1016/0031-9422(74)80222-0" @default.
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