نتایج جستجو برای: flavonol glycosides

تعداد نتایج: 10105  

Journal: :Frontiers in Plant Science 2021

Ultraviolet-B (UV-B; 280–315 nm) radiation induces the biosynthesis of secondary plant metabolites such as flavonoids. Flavonoids could also be enhanced by blue (420–490 or green (490–585 light. act antioxidants and shielding components in plant’s response to UV-B exposure. They are shown quench singlet oxygen reactive hydroxyl radical. The aim was determine whether treatment with light can alt...

2017
Stefan Czemmel Janine Höll Rodrigo Loyola Patricio Arce-Johnson José Antonio Alcalde José Tomás Matus Jochen Bogs

Flavonols constitute a group of flavonoids with important photoprotective roles in plants. In addition, flavonol content and composition greatly influences fruit quality. We previously demonstrated that the grapevine R2R3-MYB transcription factor (TF) VviMYBF1 promotes flavonol accumulation by inducing the expression of flavonol synthase (VviFLS1/VviFLS4), a key step of the initial flavonol pat...

2012
Ruohe Yin Burkhard Messner Theresa Faus-Kessler Thomas Hoffmann Wilfried Schwab Mohammad-Reza Hajirezaei Veronica von Saint Paul Werner Heller Anton R. Schäffner

Flavonols, phenylalanine-derived secondary metabolites, have protective and regulatory functions in plants. In Arabidopsis thaliana, they are consecutively glycosylated at their 3-OH and 7-OH groups. UGT78D1 and UGT78D2 are the major flavonol 3-O-glycosyltransferases in Arabidopsis leaves. The ugt78d1 ugt78d2 double mutant, which was strongly compromised in the initial 3-O-glycosylation, showed...

Journal: :OENO One 2021

Quercetin haze has been observed over the last few years in some aged Sangiovese wines. This problem could be due to an excess of quercetin wine. Leaf removal increases exposition clusters sunlight, which may enhance flavonol synthesis grapes. In this study, we evaluated dynamics related extractable flavonols grapes grown three usually defoliated Vitis vinifera (L.) cv. vineyards, whose wines s...

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