烟草
黄瓜花叶病毒
生物
丁香假单胞菌
拟南芥
拟南芥
黄瓜病毒
病毒
转基因
免疫系统
先天免疫系统
效应器
病毒学
植物抗病性
基因
细胞生物学
植物病毒
微生物学
病菌
突变体
遗传学
作者
Jun Kong,Wei MeiSheng,Guifen Li,Rong Lei,Yanhong Qiu,Chenguang Wang,Zhihong Li,Shuifang Zhu
标识
DOI:10.1016/j.bbrc.2018.01.072
摘要
Cucumber Mosaic Virus (CMV) has a small RNA genome that encodes a limited number of proteins, but can infect many plant species, including Arabidopsis thaliana and Nicotiana benthamiana. Virus proteins thus have multiple means of conferring their pathogenicity during the infection process. However, the pathogenic mechanism of CMV remains unclear. Here we discovered that the expression of the CMV movement protein (MP) in A. thaliana and N. benthamiana can suppress reactive oxygen species (ROS) production triggered by multiple pathogen-associated molecular patterns (PAMPs), such as bacteria-derived peptide flg22, elf18, and fungal-derived chitin. Transgenic Arabidopsis plants expressing the MP were compromised in flg22-induced immune activation and were more susceptible to Pseudomonas syringae pv. tomato (Pst) DC3000 hrcC- strain infection. Further analysis revealed that flg22-induced resistance gene expression was also compromised in MP transgenic plants. The CMV MP protein was previously reported to function in cell-to-cell movement processes, and our findings offer a new molecular mechanism for the CMV MP protein in suppression of host PAMP-triggered immune responses.
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