Hongyacha, a Naturally Caffeine-Free Tea Plant from Fujian, China

文献类型： 外文期刊

第一作者： Jin, Ji-Qiang

作者： Jin, Ji-Qiang;Chai, Yun-Feng;Liu, Yu-Fei;Zhang, Jing;Yao, Ming-Zhe;Chen, Liang

作者机构：

关键词： caffeine-free; chemical component; morphological characteristic; Hongyacha; tea caffeine synthase

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2018 年 66 卷 43 期

页码：

收录情况： SCI

摘要： Hongyacha (HYC) is a type of new wild tea plant discovered in Fujian Province, China. This tea is helpful to the healing or prevention of disease in its original growing area. However, research on this tea is limited. Our results showed that HYC displayed obvious differences in its morphological characteristics compared with Cocoa tea (Camellia ptilophylla Chang), a famous caffeine-free tea plant in China. Theobromine and trans-catechins, but not caffeine and cis-catechins, were the dominant purine alkaloids and catechins detected in HYC. HYC might contain abundant gallocatechin-(4 -> 8)-gallocatechin gallate, 1,3,4,6-tetra-O-galloyl-beta-D-glucopyranose, and (-)-gallocatechin-3,5-di-O-gallate, which were not detected in regular tea. We also found that the TCSI of HYC was distinct, and the responding recombinant protein exhibited only theobromine synthase activity. The obtained results showed that HYC is a new kind of caffeine-free tea plant and may be used for scientific protection and efficient utilization in the future.

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