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Transformation of Salicylic Acid and Its Distribution in Tea Plants (Camellia sinensis) at the Tissue and Subcellular Levels

文献类型： 外文期刊

作者： Li, Jianlong 1 ; Xiao, Yangyang 3 ; Fan, Qian 3 ; Liao, Yinyin 3 ; Wang, Xuewen 3 ; Fu, Xiumin 3 ; Gu, Dachuan 3 ; Chen, 1 ;

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, Guangdong Prov Key Lab Appl Bot, 723 Xingke Rd, Guangzhou 510650, Peoples R China

4.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

5.Univ Chinese Acad Sci, Coll Life Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China

6.Gannan Normal Univ, Coll Life Sci, Natl Navel Orange Engn Res Ctr, Rongjiang New Dist 341000, Ganzhou, Peoples R China

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

关键词： tea; Camellia sinensis; salicylic acid; salicylic acid 2-O-beta-glucoside; methyl salicylate; transformation; distribution

期刊名称：PLANTS-BASEL （ 影响因子：3.935； ）

ISSN：

年卷期： 2021 年 10 卷 2 期

页码：

收录情况： SCI

摘要： Salicylic acid (SA) is a well-known immune-related hormone that has been well studied in model plants. However, less attention has been paid to the presence of SA and its derivatives in economic plants, such as tea plants (Camellia sinensis). This study showed that tea plants were rich in SA and responded differently to different pathogens. Feeding experiments in tea tissues further confirmed the transformation of SA into salicylic acid 2-O-beta-glucoside (SAG) and methyl salicylate. Nonaqueous fractionation techniques confirmed that SA and SAG were mostly distributed in the cytosol of tea leaves, consistent with distributions in other plant species. Furthermore, the stem epidermis contained more SA than the stem core both in C. sinensis cv. "Jinxuan" (small-leaf species) and "Yinghong No. 9" (large-leaf species). Compared with cv. "Yinghong No. 9", cv. "Jinxuan" contained more SAG in the stem epidermis, which might explain its lower incidence rate of wilt disease. This information will improve understanding of SA occurrence in tea plants and provide a basis for investigating the relationship between SA and disease resistance in tea plants.

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