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Jasmonates Play an Important Role in Differential Accumulation of Key Oolong Tea Aromas in Two Tea Varieties (Camellia sinensis)

文献类型： 外文期刊

作者： Li, Xin-Lei 1 ; Deng, Hui-Li 2 ; Zheng, Yu-Cheng 3 ; Kong, Xiang-Rui 1 ; Zhong, Qiu-Sheng 1 ; You, Xiao-Mei 1 ; Shan, Rui-Yang 1 ; Lin, Zheng-He 1 ; Chen, Zhi-Hui 1 ; Chen, Chang-Song 1 ;

作者机构： 1.Fujian Acad Agr Sci, Tea Res Inst, Fuzhou 350013, Peoples R China

2.Minjiang Teachers Coll, Res Off Dept, Fuzhou 350108, Peoples R China

3.Wuyi Univ, Coll Tea & Food Sci, Wuyishan 354300, Peoples R China

4.Natl Ctr Tea Improvement, Fujian Branch, Fuzhou 350013, Peoples R China

关键词： aroma metabolism; different tea varieties; jasmonates; mechanical stress; transcriptomics

期刊名称：HORTICULTURAE （ 影响因子：3.1； 五年影响因子：3.4 ）

ISSN：

年卷期： 2024 年 10 卷 5 期

页码：

收录情况： SCI

摘要： Aroma is an important factor in the measurement of the quality and market value of oolong tea. However, it is hard to develop an oolong tea with good aroma quality using unsuitable tea varieties. To explore the key factors of tea varieties in the formation of oolong tea aromas, the fresh leaves of the Chungui variety (CG, suitable for oolong tea, Camellia sinensis (L.) O. Kuntze) and the Fuyun No. 6 variety (F6, unsuitable for oolong tea, Camellia sinensis (L.) O. Kuntze) were harvested and treated by withering and mechanical stress in order. Then, aroma, transcriptome, and jasmonate (JA) contents, and weighted gene co-expression network analysis (WGCNA), of samples were investigated. The contents of characteristic oolong tea aromas, including indole, (E)-beta-ocimene, (E)-nerolidol, alpha-farnesene, and jasmine lactone, were all accumulated in much higher quantities in the CG variety after withering and mechanical stress. Accordingly, the coding genes of aroma formation synthases TSB2, OCS, NES, AFS, and LOX1, and related genes in MVA, MEP, and ALA pathways, were all much more highly activated. These differential reactions are mainly caused by the higher accumulation of jasmonates, especially methyl jasmonate, a type of important plant signal chemical, in CG after mechanical stress. WGCNA analysis indicated 34 different transcription factors from different families are predicted to be involved in this jasmonate-responsive reaction.

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