Effects of sunlight exclusion on the profiles of monoterpene biosynthesis and accumulation in grape exocarp and mesocarp

文献类型： 外文期刊

第一作者： Zhang, Erpeng

作者： Zhang, Erpeng;Li, Shaohua;Liang, Zhenchang;Fan, Peige;Zhang, Erpeng;Li, Shaohua;Liang, Zhenchang;Fan, Peige;Chai, Fengmei;Chai, Fengmei;Zhang, Haohao

作者机构：

关键词： Free and glycosylated monoterpene;Glycosyltransferase;Muscat grape;Sunlight exclusion;Terpene synthase

期刊名称：FOOD CHEMISTRY （ 影响因子：7.514； 五年影响因子：7.516 ）

ISSN： 0308-8146

年卷期： 2017 年 237 卷

页码：

收录情况： SCI

摘要： Terpenes are important aroma compounds in table Muscat grape and wine, and their content in the berry can be affected by sunlight. The effects of sunlight exclusion on monoterpene profiles and relevant gene expression profiles in the exocarp and mesocarp of table Muscat grape 'Jingxiangyu' at different development stages were thoroughly surveyed by bagging pre-veraison clusters in special opaque boxes. The responses of monoterpenes to sunlight treatments varied in three types, representatively linalool, ocimene and geraniol. Linalool was the most sensitive compound to sunlight, whose biosynthesis was severely inhibited by sunlight exclusion and then was elevated by re-exposure. Ocimene and glycosylated geraniol showed a certain suppressive and stimulative responses to sunlight exclusion respectively. Further transcription analysis revealed that VvPNLinNer1, VvCSbOci, VvGT7 and VvGT14 genes were mainly responsible for monoterpene accumulation and sensitivity to sunlight. VvDXS2 and VvDXR genes were partially related to the differential accumulation of total terpenes under different sunlight treatments. (C) 2017 Elsevier Ltd. All rights reserved.

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