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FoEG1, a secreted glycoside hydrolase family 12 protein from Fusarium oxysporum , triggers cell death and modulates plant immunity

文献类型： 外文期刊

作者： Lin Zhang;Jianpei Yan;Zhenchao Fu;Wenjiong Shi;Vincent Ninkuu;Guangyue Li;Xiufen Yang;Hongmei Zeng

作者机构：

关键词： FoEG1; Fusarium oxysporum; PAMP; plant immunity; virulence

期刊名称： Mol. Plant Pathol.

ISSN： 1464-6722

年卷期： 2021 年

页码：

收录情况： JCR（2021版）

摘要： Fusarium oxysporum is an important soilborne fungal pathogen with many different formae speciales that can colonize the plant vascular system and cause serious crop wilt disease worldwide. We found a glycoside hydrolase family 12 protein FoEG1, secreted by F. oxysporum, that acted as a pathogen-associated molecular pattern (PAMP) targeting the apoplast of plants to induce cell death. Purified FoEG1 protein triggered cell death in different plants and induced the plant defence response to enhance the disease resistance of plants. The ability of FoEG1 to induce cell death was mediated by leucine-rich repeat (LRR) receptor-like kinases BAK1 and SOBIR1, and this ability was independent of its hydrolase activity. The mutants of cysteine residues did not affect the ability of FoEG1 to induce cell death, and an 86 amino acid fragment from amino acid positions 144 to 229 of FoEG1 was sufficient to induce cell death in Nicotiana benthamiana. In addition, the expression of FoEG1 was strongly induced in the early stage of F. oxysporum infection of host plants, and FoEG1 deletion or loss of enzyme activity reduced the virulence of F. oxysporum. Therefore, our results suggest that FoEG1 can contribute to the virulence of F. oxysporum depending on its enzyme activity and can also act as a PAMP to induce plant defence responses. © 2021 The Authors. Molecular Plant Pathology published by British Society for Plant Pathology and John Wiley & Sons Ltd

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