Accumulation of catechins and expression of catechin synthetic genes in Camellia sinensis at different developmental stages

文献类型： 外文期刊

第一作者： Zhang, Li-Qun

作者： Zhang, Li-Qun;Wei, Kang;Cheng, Hao;Wang, Li-Yuan;Zhang, Cheng-Cai

作者机构：

关键词： Camellia sinensis;Catechins;Chalcone synthase;Anthocyanidin synthase;Anthocyanidin reductase;Leucoanthocyanidin reductase

期刊名称：BOTANICAL STUDIES （ 影响因子：2.787； 五年影响因子：2.871 ）

ISSN： 1999-3110

年卷期： 2016 年 57 卷

页码：

收录情况： SCI

摘要： Background: Catechins are the main polyphenol compounds in tea (Camellia sinensis). To understand the relationship between gene expression and product accumulation, the levels of catechins and relative expressions of key genes in tea leaves of different developmental stages were analyzed. Results: The amounts of catechins differed significantly in leaves of different stages, except for gallocatechin gallate. Close correlations between the expression of synthesis genes and the accumulation of catechins were identified. Correlation analysis showed that the expressions of chalcone synthase 1, chalcone synthase 3, anthocyanidin reductase 1, anthocyanidin reductase 2 and leucoanthocyanidin reductase genes were significantly and positively correlated with total catechin contents, suggesting their expression may largely affect total catechin accumulation. Anthocyanidin synthase was significantly correlated with catechin. While both ANRs and LAR were significantly and positively correlated with the contents of (-)-epigallocatechin gallate and (-)-epicatechin gallate. Conclusion: Our results suggest synergistic changes between the expression of synthetic genes and the accumulation of catechins. Based on our findings, anthocyanidin synthase may regulate earlier steps in the conversion of catechin, while the anthocyanidin reductase and leucoanthocyanidin reductase genes may both play important roles in the biosynthesis of galloylated catechins.

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