Evaluation of the contribution of trichomes to metabolite compositions of tea (Camellia sinensis) leaves and their products
文献类型： 外文期刊
作者： Li, Jianlong 1 ; Zeng, Lanting 3 ; Liao, Yinyin 3 ; Tang, Jinchi 1 ; Yang, Ziyin 3 ;
作者机构： 1.Guangdong Acad Agr Sci, Tea Res Inst, 6 Dafeng Rd, Guangzhou 510640, Peoples R China
2.Guangdong Prov Key Lab Tea Plant Resources Innova, 6 Dafeng Rd, Guangzhou 510640, Peoples R China
3.Chinese Acad Sci, Key Lab South China Agr Plant Mol Anal & Genet Im, South China Bot Garden, 723 Xingke Rd, Guangzhou 510650, Peoples R China
4.Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, 723 Xingke Rd, Guangzhou 510650, Peoples R China
5.Chinese Acad Sci, Ctr Econ Bot, Core Bot Gardens, 723 Xingke Rd, Guangzhou 510650, Peoples R China
关键词： Tea; Aroma; Camellia sinensis; Trichome; Amino acid
期刊名称：LWT-FOOD SCIENCE AND TECHNOLOGY （ 影响因子：4.952； 五年影响因子：5.383 ）
ISSN： 0023-6438
年卷期： 2020 年 122 卷
页码：
收录情况： SCI
摘要： Tea is processed from the postharvest tender leaves from tea plants (Camellia sinensis). Leaves containing more trichomes are considered to produce higher quality tea, but no evidence is available to support this opinion. In the present study, morphological and metabolic analyses of trichomes showed that tea trichomes were unicellular, simple, and rich in many water-soluble metabolites, including free catechins, caffeine, and amino acids. Furthermore, the analysis of known quality-related and non-targeted metabolites in fresh tea leaves and tea products showed that the presence of trichomes did not change the overall metabolite profiles of fresh tea leaves, white tea, and black tea, but might affect the non-targeted metabolites in green tea. Overall, more trichomes might only indicate higher quality tea leaves, while metabolites in the leaf might be the key factor. This study provides the first determination of the contribution of trichomes to tea quality.
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