Chemosystematics of tea trees based on tea leaf polyphenols as phenetic markers

文献类型： 外文期刊

第一作者： Li, Jia-Hua

作者： Li, Jia-Hua;Shimizu, Keiichi;Sakata, Yusuke;Hashimoto, Fumio;Li, Jia-Hua;Shimizu, Keiichi;Sakata, Yusuke;Hashimoto, Fumio;Nesumi, Atsushi;Liang, Ming-Zhi;He, Qing-Yuan;Zhou, Hong-Jie

作者机构：

关键词： Cha (tea);Camellia sinensis;Theaceae;Chemical taxonomy;Flavan-3-ol;Green tea;Polyphenol;Puer tea;Yunnan macrophyllus species

期刊名称：PHYTOCHEMISTRY （ 影响因子：4.072； 五年影响因子：4.132 ）

ISSN： 0031-9422

年卷期： 2010 年 71 卷 11-12 期

页码：

收录情况： SCI

摘要： This study examined the polyphenols of tea leaves as chemotaxonomic markers to investigate the phenetic relationship between 89 wild (the small-leaved C. sinensis var. sinensis and large-leaved C. sinensis var. assamica), hybrid, and cultivated tea trees from China and Japan. (-)-Epigallocatechin 3-O-gallate, EGCG (1); (-)-epigallocatechin, EGC (2); (-)-epicatechin 3-O-gallate, ECG (3); (-)-epicatechin, EC (4); (+)-catechin, CA (5); strictinin, SIR (6); and gallic acid, GA (7) were used as polyphenolic markers. Of the 13 polyphenol patterns observed, Principal Component Analysis (PCA) indicated that the structure-types of the flavonoid B-rings, such as the pyrogallol-(EGCG (1) and EGC (2)) and catechol-(ECG (3) and EC (4)) types, greatly influenced the classification. Ward's minimum-variance cluster analysis was used to produce a dendrogram that consisted of three sub-clusters. One sub-cluster (A) was composed of old tea trees 'Gushu' cha (C. sinensis var. assamica) and cv 'Taidi' cha, suggesting that relatively primitive tea trees contain greater amounts of compounds 3 and 4 and lower amounts of compounds 1 and 2. The other two sub-clusters B and C, made up of Chinese hybrids (sub-cluster B) and Japanese and Taiwanese tea trees (sub-cluster C), had lower contents of 3 and 4 than sub-cluster A. Therefore, PCA and cluster analysis indicated that the greater the amounts of 1 and 2 (and the lower of 3 and 4), the more recent the origin of the tea line. Based on morphological characteristics, geographical information, and the historical information on tea trees, these results show good agreement with the current theory of tea tree origins, and this suggests that the Xishuangbanna district and Puer City are among the original sites of the tea tree species. (C) 2010 Elsevier Ltd. All rights reserved.

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