Hongyacha, a Naturally Caffeine-Free Tea Plant from Fujian, China
Hongyacha, a Naturally Caffeine-Free Tea Plant from Fujian, China
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红芽茶，一种来自中国福建的天然不含咖啡因的茶树。
DOI：
10.1021/acs.jafc.8b03433
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发表时间：
2018-10-31
影响因子：
6.1
通讯作者：
Chen, Liang
中科院分区：
文献类型：
--
作者：
Jin, Ji-Qiang;Chai, Yun-Feng;Chen, Liang
红芽茶是福建省新发现的一种野生茶树。这种茶有助于治愈或预防其原产地的疾病。然而，对这种茶的研究有限。结果表明，HYC与我国著名的无咖啡因茶树可可茶（Camellia ptilophylla Chang）在形态特征上存在明显差异。可可碱和反式儿茶素，而不是咖啡因和顺式儿茶素，是占主导地位的嘌呤生物碱和儿茶素检测HYC。HYC可能含有大量的没食子儿茶素-（4 → 8）-没食子儿茶素没食子酸酯、1，3，4，6-四-O-没食子酰基-β-D-吡喃葡萄糖和（-）-没食子儿茶素-3，5-二-O-没食子酸酯，这些物质在普通茶中没有检测到。我们还发现HYC的TCS 1是独特的，并且对应的重组蛋白仅表现出可可碱合酶活性。结果表明，HYC是一种新的不含咖啡因的茶树品种，可进行科学保护和有效利用。
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-β-d-glucopyranose, and (-)-gallocatechin-3,5-di- O-gallate, which were not detected in regular tea. We also found that the TCS1 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.