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Characterizing the cultivar-specific mechanisms underlying the accumulation of quality-related metabolites in specific Chinese tea (Camellia sinensis) germplasms to diversify tea products

文献类型： 外文期刊

作者： Li, Jianlong 1 ; Xiao, Yangyang 2 ; Zhou, Xiaochen 2 ; Liao, Yinyin 2 ; Wu, Shuhua 2 ; Chen, Jiaming 2 ; Qian, Jiajia 2 ; Yan, Ying 6 ; Tang, Jinchi 1 ; Zeng, Lanting 2 ;

作者机构： 1.Guangdong Acad Agr Sci, Tea Res Inst, 6 Dafeng Rd, Guangzhou 510640, Peoples R China

2.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

3.Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, 723 Xingke Rd, Guangzhou 510650, Peoples R China

4.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China

5.Chinese Acad Sci, Ctr Econ Bot, Core Bot Gardens, 723 Xingke Rd, Guangzhou 510650, Peoples R China

6.Zhanjiang Minghe Tea Ind Co Ltd, 18 Guangtian Rd, Zhanjiang 524043, Peoples R China

7.Doctor Stn Guangdong Prov, 18 Guangtian Rd, Zhanjiang 524043, Peoples R China

关键词： Tea germplasm; Camellia sinensis; Secondary metabolite; Quality; Differential distribution; Regulatory mechanism

期刊名称：FOOD RESEARCH INTERNATIONAL （ 影响因子：8.1； 五年影响因子：7.7 ）

ISSN： 0963-9969

年卷期： 2022 年 161 卷

页码：

收录情况： SCI

摘要： The diverse tea (Camellia sinensis) germplasms in China include those that specifically accumulate metabolites, such as anthocyanin, catechin, amino acid, caffeine, aroma compound, and chlorophyll. There is interest in the derived products because of special flavor quality or high efficacy activity. This review describes the characteristics of specific tea germplasms and associated regulatory mechanisms. High expression levels of the corresponding biosynthetic genes lead to the substantial accumulation of anthocyanins. The increased metabolic flux from anthocyanins to galloylated catechins is responsible for the occurrence of high-catechin germplasms. The precursor ethylamine determines the differential abundance of L-theanine between tea and other plants. The high amino acid contents in albino germplasms are the result of decreased L-theanine hydrolysis. In low-caffeine tea germplasms, caffeine synthase genes are minimally expressed or mutated. High-aroma germplasms are associated with an increase in the precursors or strong stress-induced responses. Enhanced chloroplast and chlorophyll synthesis is a hallmark of the high-chlorophyll germplasms. Overall, biosynthetic metabolism might have contributed to the occurrence of specific tea germplasms. Furthermore, elucidation the deeper molecular mechanisms in specific tea germplasms are significant and urgent. The information will enhance our understanding of the metabolic activities in tea plants, with implications for tea breeding.

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