The effect of temperature and radiation on flavonol aglycones and flavonol glycosides of kale (Brassica oleracea var. sabellica)

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• 作者：Susanne Neugart^a ; Hans-Peter Klä ; ring^a ; Michaela Zietz^b ; Monika Schreiner^a ; Sascha Rohn^c ; Lothar W. Kroh^b ; Angelika Krumbein^a ; ^{Krumbein@igzev.de}
• 关键词：Kale ; Flavonol aglycones ; Flavonol glycosides ; Temperature ; Radiation
• 刊名：Food Chemistry
• 出版年：2012
• 出版时间：15 August, 2012
• 年：2012
• 卷：133
• 期：4
• 页码：1456-1465
• 全文大小：635 K

文摘

The winter crop kale has a complex profile of different glycosylated and acylated flavonol glycosides which may be affected by global warming. To the best of our knowledge, compound-climate relationships for flavonol aglycones and flavonol glycosides were established for the first time. The investigated 10 major flavonol glycosides responded structure-dependent in the investigated temperature range between 0 and 12 ¡ãC and the photosynthetic active radiation range between 4 and 20 mol m^? d^?, e.g. the decrease in temperature led to an increase in sinapic acid monoacylated and diacylated quercetin glycosides, while the sinapic acid monoacylated kaempferol glycosides showed a maximum at 4.5 ¡ãC. Furthermore, the hydroxycinnamic acid residues and the different number of glucose moieties in the 7-O position affected the response of kaempferol triglucosides. Consequently, global warming would result in lower concentrations of antioxidant-relevant quercetin glycosides in winter crops, suggesting a production at e.g. higher altitudes due to lower temperature.