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OsTGAL1 suppresses the resistance of rice to bacterial blight disease by regulating the expression of salicylic acid glucosyltransferase OsSGT1

文献类型： 外文期刊

作者： Li, Dongyue 1 ; Zhou, Jie 1 ; Zheng, Chao 1 ; Zheng, Ersong 1 ; Liang, Weifang 1 ; Tan, Xiaojing 1 ; Xu, Rumeng 1 ; Yan, Chengqi 3 ; Yang, Yong 1 ; Yi, Keke 4 ; Liu, Xiuli 1 ; Chen, Jianping 1 ; Wang, Xuming 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, State Key Lab Managing Biot & Chem Threats Qual &, Zhejiang Prov Key Lab Plant Virol, Minist Agr Key Lab Plant Protect & Biotechnol, Hangzhou, Peoples R China

2.Yunnan Agr Univ, Coll Plant Protect, Kunming, Yunnan, Peoples R China

3.Ningbo Acad Agr Sci, Inst Biotechnol, Ningbo, Peoples R China

4.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing, Peoples R China

5.Ningbo Univ, Inst Plant Virol, Ningbo, Peoples R China

关键词： OsGRX17; OsSGT1; OsTGAL1; SA signaling; Xoo

期刊名称：PLANT CELL AND ENVIRONMENT （ 影响因子：7.947； 五年影响因子：8.452 ）

ISSN： 0140-7791

年卷期： 2022 年 45 卷 5 期

页码：

收录情况： SCI

摘要： Many TGA transcription factors participate in immune responses in the SA-mediated signaling pathway in Arabidopsis. This study identified a transcription factor OsTGAL1, which is induced upon infection by Xoo. Overexpression of OsTGAL1 increased the susceptibility of rice to Xoo. Plants overexpressing OsTGAL1 could affect the expression of many SA signaling-related genes. OsTGAL1 was able to interact with the promoter of OsSGT1, which encodes a key enzyme for SA metabolism. The transcript of OsSGT1 was induced by Xoo and this responsive expression was further increased in plants overexpressing OsTGAL1. OsSGT1 knockout lines had enhanced resistance to Xoo, and knocking out OsSGT1 in plants overexpressing OsTGAL1 blocked the susceptibility caused by OsTGAL1. Altered expression levels of several OsPRs in all the transgenic plants demonstrated that SA-mediated signaling had been affected. Furthermore, we identified an oxidoreductase of CC-type glutaredoxin, OsGRX17, which interacted with OsTGAL1. OsGRX17 reduced the regulation of OsTGAL1 on OsSGT1, and this may be due to its redox modulation. Thus, our results demonstrate that OsTGAL1 negatively regulates resistance to Xoo by its effects on SA metabolism via the activation of OsSGT1, which provides valuable targets for plant breeders in developing new cultivars that are resistant to Xoo.

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