Biosynthetic Pathway and Bioactivity of Vanillin, a Highly Abundant Metabolite Distributed in the Root Cortex of Tea Plants (Camellia sinensis)
文献类型： 外文期刊
作者： Huang, Yanfei 1 ; Yang, Yuhua 1 ; Xue, Jinghua 1 ; Liao, Yinyin 1 ; Fu, Xiumin 1 ; Zhu, Chen 1 ; Li, Jianlong 5 ; Zeng, Lanting 1 ; Yang, Ziyin 1 ;
作者机构： 1.Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, Guangzhou 510650, Peoples R China
2.Chinese Acad Sci, State Key Lab Plant Divers & Specialty Crops, South China Bot Garden, Guangzhou 510650, Peoples R China
3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Key Lab Ex Situ Plant Protect & Utilizat South Ch, South China Bot Garden, Guangzhou 510650, Peoples R China
5.Guangdong Acad Agr Sci, Guangzhou 510640, Peoples R China
6.Tea Res Inst, Guangdong Prov Key Lab Tea Plant Resources Innova, Guangzhou 510640, Peoples R China
关键词： tea; Camellia sinensis; root; vanillin; volatile; biosynthesis; biological function
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.1； 五年影响因子：6.3 ）
ISSN： 0021-8561
年卷期： 2024 年 72 卷 3 期
页码：
收录情况： SCI
摘要： Volatiles are important for plant root stress resistance. The diseases in tea root are serious, causing major losses. The volatile composition in tea root and whether it can resist diseases remain unclear. In this study, the volatile composition in different tea tissues was revealed. The vanillin content was higher in the root (mainly in root cortex) than in aerial parts. The antifungal effects of vanillin on pathogenic fungi in tea root were equal to or greater than those of other metabolites. O-methyltransferase (CsOMT), a key enzyme in one of two biosynthetic pathways of vanillin, converted protocatechualdehyde to vanillin in vitro. Furthermore, its characteristics and kinetic parameters were studied. In Arabidopsis thaliana protoplasts, the transiently expressed CsOMT was localized in the cytoplasm and nucleus. These findings have clarified the formation and bioactivities of volatiles in tea roots and provided a theoretical basis for understanding how tea plants resist root diseases.
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