Relationship between the Composition of Flavonoids and Flower Colors Variation in Tropical Water Lily Nymphaea CultivarsReportar como inadecuado

Relationship between the Composition of Flavonoids and Flower Colors Variation in Tropical Water Lily Nymphaea Cultivars - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Water lily, the member of the Nymphaeaceae family, is the symbol of Buddhism and Brahmanism in India. Despite its limited researches on flower color variations and formation mechanism, water lily has background of blue flowers and displays an exceptionally wide diversity of flower colors from purple, red, blue to yellow, in nature. In this study, 34 flavonoids were identified among 35 tropical cultivars by high-performance liquid chromatography HPLC with photodiode array detection DAD and electrospray ionization mass spectrometry ESI-MS. Among them, four anthocyanins: delphinidin 3-O-rhamnosyl-5-O-galactoside Dp3Rh5Ga, delphinidin 3-O-2″-O-galloyl-6″-O-oxalyl-rhamnoside Dp3galloyl-oxalylRh, delphinidin 3-O-6″-O-acetyl-β-glucopyranoside Dp3acetylG and cyanidin 3- O-2″-O-galloyl-galactopyranoside-5-O-rhamnoside Cy3galloylGa5Rh, one chalcone: chalcononaringenin 2′-O-galactoside Chal2′Ga and twelve flavonols: myricetin 7-O-rhamnosyl-1→2-rhamnoside My7RhRh, quercetin 7-O-galactosyl-1→2-rhamnoside Qu7GaRh, quercetin 7-O-galactoside Qu7Ga, kaempferol 7-O-galactosyl-1→2-rhamnoside Km7GaRh, myricetin 3-O-galactoside My3Ga, kaempferol 7-O-galloylgalactosyl-1→2-rhamnoside Km7galloylGaRh, myricetin 3-O-galloylrhamnoside My3galloylRh, kaempferol 3-O-galactoside Km3Ga, isorhamnetin 7-O-galactoside Is7Ga, isorhamnetin 7-O-xyloside Is7Xy, kaempferol 3-O-3″-acetylrhamnoside Km3-3″acetylRh and quercetin 3-O-acetylgalactoside Qu3acetylGa were identified in the petals of tropic water lily for the first time. Meanwhile a multivariate analysis was used to explore the relationship between pigments and flower color. By comparing, the cultivars which were detected delphinidin 3-galactoside Dp3Ga presented amaranth, and detected delphinidin 3′-galactoside Dp3′Ga presented blue. However, the derivatives of delphinidin and cyanidin were more complicated in red group. No anthocyanins were detected within white and yellow group. At the same time a possible flavonoid biosynthesis pathway of tropical water lily was presumed putatively. These studies will help to elucidate the evolution mechanism on the formation of flower colors and provide theoretical basis for outcross breeding and developing health care products from this plant.

Autor: Manlan Zhu, Xuchen Zheng, Qingyan Shu , Hui Li, Peixing Zhong, Huijin Zhang, Yanjun Xu, Lijin Wang, Liangsheng Wang



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