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A novel pathogenicity determinant hijacks maize catalase 1 to enhance viral multiplication and infection

文献类型： 外文期刊

作者： Jiao, Zhiyuan 1 ; Tian, Yiying 1 ; Cao, Yanyong 3 ; Wang, Juan 1 ; Zhan, Binhui 1 ; Zhao, Zhenxing 1 ; Sun, Biao 1 ; Guo, 1 ;

作者机构： 1.China Agr Univ, State Kay Lab Agrobiotechnol, Dept Plant Pathol, Beijing 100193, Peoples R China

2.China Agr Univ, Key Lab Pest Monitoring & Green Management MOA, Dept Plant Pathol, Beijing 100193, Peoples R China

3.Henan Acad Agr Sci, Cereal Crops Inst, Zhengzhou 450002, Peoples R China

4.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, State Key Lab Sustainable Control Pest & Dis, Hangzhou 310021, Peoples R China

5.Hong Kong Baptist Univ, Dept Biol, Hong Kong, Peoples R China

6.Chinese Univ Hong Kong, State Key Lab Agrobiotechnol, Hong Kong, Peoples R China

关键词： catalase; maize chlorotic mottle virus (MCMV); pathogenesis‐ related (PR) protein; salicylic acid (SA)‐ mediated defence; systemic necrosis; Zea mays

期刊名称：NEW PHYTOLOGIST （ 影响因子：10.151； 五年影响因子：10.475 ）

ISSN： 0028-646X

年卷期： 2021 年 230 卷 3 期

页码：

收录情况： SCI

摘要： Pathogens have evolved various strategies to overcome host immunity for successful infection. Maize chlorotic mottle virus (MCMV) can cause lethal necrosis in maize (Zea mays) when it coinfects with a virus in the Potyviridae family. However, the MCMV pathogenicity determinant remains largely unknown. Here we show that the P31 protein of MCMV is important for viral accumulation and essential for symptom development. Ectopic expression of P31 using foxtail mosaic virus or potato virus X induced necrosis in systemically infected maize or Nicotiana benthamiana leaves. Maize catalases (CATs) were shown to interact with P31 in yeast and in planta. P31 accumulation was elevated through its interaction with ZmCAT1. P31 attenuated the expression of salicylic acid (SA)-responsive pathogenesis-related (PR) genes by inhibiting catalase activity during MCMV infection. In addition, silencing of ZmCATs using a brome mosaic virus-based gene silencing vector facilitated MCMV RNA and coat protein accumulation. This study reveals an important role for MCMV P31 in counteracting host defence and inducing systemic chlorosis and necrosis. Our results have implications for understanding the mechanisms in defence and counter-defence during infection of plants by various pathogens.

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