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

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 ( ). This study showed that tea plants were rich in SA and responded different...

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Bibliographic Details
Published in:Plants (Basel) 2021-02, Vol.10 (2), p.282
Main Authors: Li, Jianlong, Xiao, Yangyang, Fan, Qian, Liao, Yinyin, Wang, Xuewen, Fu, Xiumin, Gu, Dachuan, Chen, Yiyong, Zhou, Bo, Tang, Jinchi, Zeng, Lanting
Format: Article
Language:English
Subjects:
Biosynthesis
Camellia sinensis
Chromatography
Cultivars
Cytosol
Defense mechanisms
Disease resistance
Economic planning
Epidermis
Fractionation
Genetic transformation
Hormones
Horticulture
Infections
Leaves
Mass spectrometry
Metabolites
methyl salicylate
Pathogens
Plant diseases
Plant resistance
Plant species
Salicylic acid
salicylic acid 2-O-β-glucoside
Scientific imaging
Signal transduction
Species
Stems
Tea
transformation
Trees
Wilt
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Summary: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 ( ). 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- -β-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 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.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants10020282