Small secreted peptides (SSPs) in tomato and their potential roles in drought stress response

文献类型： 外文期刊

第一作者： Xu, Kexin

作者： Xu, Kexin;Wang, Tingjin;Zhang, Aijun;Elsadek, Mohamed Abdou Youssef;Liu, Weihong;Chen, Liping;Tian, Dongdong;Guo, Yongfeng

作者机构：

关键词： Small secreted peptide; Tomato; Drought stress; CEP peptide

期刊名称：MOLECULAR HORTICULTURE （ 影响因子：8.1； 五年影响因子：11.0 ）

ISSN： 2730-9401

年卷期： 2023 年 3 卷 1 期

页码：

收录情况： SCI

摘要： Tomato (Solanum lycopersicum) is one of the most important vegetable crops in the world and abiotic stresses often cause serious problems in tomato production. It is thus important to identify new regulators in stress response and to devise new approaches to promote stress tolerance in tomato. Previous studies have shown that small secreted peptides (SSPs) are important signal molecules regulating plant growth and stress response by mediating intercellular communication. However, little is known about tomato SSPs, especially their roles in responding to abiotic stresses. Here we report the identification of 1,050 putative SSPs in the tomato genome, 557 of which were classified into 38 known SSP families based on their conserved domains. GO and transcriptome analyses revealed that a large proportion of SlSSPs might be involved in abiotic stress response. Further analysis indicated that stress response related cis-elements were present on the SlCEP promotors and a number of SlCEPs were significantly upregulated by drought treatments. Among the drought-inducible SlCEPs, SlCEP10 and SlCEP11b were selected for further analysis via exogenous application of synthetic peptides. The results showed that treatments with both SlCEP10 and SlCEP11b peptides enhanced tomato drought stress tolerance, indicating the potential roles of SlSSPs in abiotic stress response.

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