Gene Expression of Type VI Secretion System Associated with Environmental Survival in Acidovorax avenae subsp avenae by Principle Component Analysis

文献类型： 外文期刊

第一作者： Cui, Zhouqi

作者： Cui, Zhouqi;Li, Bin;Kakar, Kaleem Ullah;Ojaghian, Mohammad Reza;Xie, Guanlin;Jin, Guoqiang;Wang, Yangli;Sun, Guochang

作者机构：

关键词： T6SS gene expression;gene knockout;co-culture;in vivo;stress;principle component analysis

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2015 年 16 卷 9 期

页码：

收录情况： SCI

摘要： Valine glycine repeat G (VgrG) proteins are regarded as one of two effectors of Type VI secretion system (T6SS) which is a complex multi-component secretion system. In this study, potential biological roles of T6SS structural and VgrG genes in a rice bacterial pathogen, Acidovorax avenae subsp. avenae (Aaa) RS-1, were evaluated under seven stress conditions using principle component analysis of gene expression. The results showed that growth of the pathogen was reduced by H2O2 and paraquat-induced oxidative stress, high salt, low temperature, and vgrG mutation, compared to the control. However, pathogen growth was unaffected by co-culture with a rice rhizobacterium Burkholderia seminalis R456. In addition, expression of 14 T6SS structural and eight vgrG genes was significantly changed under seven conditions. Among different stress conditions, high salt, and low temperature showed a higher effect on the expression of T6SS gene compared with host infection and other environmental conditions. As a first report, this study revealed an association of T6SS gene expression of the pathogen with the host infection, gene mutation, and some common environmental stresses. The results of this research can increase understanding of the biological function of T6SS in this economically-important pathogen of rice.

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