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Impact of cluster thinning on transcriptional regulation of anthocyanin biosynthesis-related genes in 'Summer Black' grapes

文献类型： 外文期刊

作者： Xi, Xiaojun 1 ; Zha, Qian 1 ; Jiang, Aili 1 ; Tian, Yihua 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Res Inst Forestry & Pomol, Shanghai 201403, Peoples R China

关键词： Cluster thinning;Anthocyanins;Table grape;Skin color;Gene expression

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）

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收录情况： SCI

摘要： Cluster thinning is an agronomic practice that strongly affects anthocyanin biosynthesis in the skin of grape berries. However, the impact of cluster thinning on anthocyanin biosynthesis has not been fully elucidated at the molecular level. Here, we investigated its effects on the berry quality, the biosynthesis of anthocyanins, and the expression levels of related genes from the onset of veraison to harvest in 'Summer Black' grapes. It was observed that the total soluble solid and anthocyanin content in berry skin significantly increased under cluster thinning, whereas the berry weight and titratable acidity showed no differences from the beginning of veraison to harvest. The expression level of most anthocyanin biosynthesis-related genes was significantly up-regulated by cluster thinning from the beginning of veraison and was higher at its end compared to the control. Up-regulation of flavonoid 3',5'-hydroxylase (F3'5'H) and O-methyltransferase (OMT) expression, and down-regulation of flavonoid 3'-hydroxylase (F3'H) expression were observed, which might be the cause of shift in the anthocyanin profile. These findings provide insights into the molecular basis of the relationship between cluster thinning and anthocyanin biosynthesis in the grape berry skin. (C) 2016 Elsevier Masson SAS. All rights reserved.

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