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A Pythium myriotylum Small Cysteine-Rich Protein Triggers Immune Responses in Diverse Plant Hosts

文献类型： 外文期刊

作者： Wang, Nan 1 ; Yin, Zhiyuan 2 ; Wu, Yingke 1 ; Yang, Jishuo 1 ; Zhao, Yaning 2 ; Daly, Paul 1 ; Pei, Yong 2 ; Zhou, Dongmei 1 ; Dou, Daolong 2 ; Wei, Lihui 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing, Peoples R China

2.Nanjing Agr Univ, Coll Plant Protect, Nanjing, Peoples R China

3.Huaiyin Inst Technol, Life Sci & Food Engn, Huaian, Peoples R China

关键词： auxiliary activity 17 (AA17); elicitor; ginger; P. myriotylum; Pythium soft rot

期刊名称：MOLECULAR PLANT-MICROBE INTERACTIONS （ 影响因子：3.5； 五年影响因子：4.1 ）

ISSN： 0894-0282

年卷期： 2023 年 36 卷 5 期

页码：

收录情况： SCI

摘要： The oomycete Pythium myriotylum is a necrotrophic pathogen that infects many crop species worldwide, including ginger, soybean, tomato, and tobacco. Here, we identified a P. myriotylum small cysteine-rich protein, PmSCR1, that induces cell death in Nicotiana benthamiana by screening small, secreted proteins that were induced during infection of ginger and did not have a predicted function at the time of selection. Orthologs of PmSCR1 were found in other Pythium species, but these did not have cell death-inducing activity in N. benthamiana. PmSCR1 encodes a protein containing an auxiliary activity 17 family domain and triggers multiple immune responses in host plants. The elicitor function of PmSCR1 appears to be independent of enzymatic activity, because the heat inactivation of PmSCR1 protein did not affect PmSCR1-induced cell death or other defense responses. The elicitor function of PmSCR1 was also independent of BAK1 and SOBIR1. Furthermore, a small region of the protein, PmSCR186-211, is sufficient for inducing cell death. A pretreatment using the full-length PmSCR1 protein promoted the resistance of soybean and N. benthamiana to Phytophthora sojae and Phytophthora capsici infection, respectively. These results reveal that PmSCR1 is a novel elicitor from P. myriotylum, which exhibits plant immunity-inducing activity in multiple host plants.Copyright (c) 2023 The Author(s). This is an open access article distributed under the .

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