Zinc Uptake Regulator (zur) Gene Involved in Zinc Homeostasis and Virulence of Xanthomonas oryzae pv. oryzae in Rice
文献类型： 外文期刊
作者： Yang, Wanfeng 1 ; Liu, Yan 2 ; Chen, Lei 2 ; Gao, Tongchun 2 ; Hu, Baishi 2 ; Zhang, Dongfang 2 ; Liu, Fengquan 2 ;
作者机构： 1.Nanjing Univ, Dept Plant Pathol, Nanjing 210095, Peoples R China
2.Nanjing Univ, Dept Plant Pathol, Nanjing 210095, Peoples R China; Anhui Acad Agr Sci, Inst Plant Protect, Hefei 230031, Peoples R China
期刊名称：CURRENT MICROBIOLOGY （ 影响因子：2.188； 五年影响因子：2.197 ）
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收录情况： SCI
摘要： Xanthomonas oryzae pv. oryzae causes bacterial leaf blight, one of the most widespread and destructive bacterial diseases in rice. In order to understand the gene of zinc uptake regulator (zur) involved in virulence of the pathogen in rice, we generated a mutant OSZRM by homologous suicide plasmid integration. The mutant failed to grow in NYGB medium supplemented with Zn(2+) or Fe(3+) at a concentration of 500 muM or 6 mM, whereas the wild-type strain grew well at the same conditions. The zur mutant was hypersensitive to hydrogen peroxide and exhibited reduction catalase activity and the production of extracellular polysaccharide (EPS). Interestingly, the mutant showed a reduction in virulence on rice but still kept triggering hypersensitive response (HR) in tobacco. When the mutant was complemented with the zur gene, the response was recovered to wild-type. These results suggested that zur gene is a functional member of the Zur regulator family that controls zinc and iron homeostasis, oxidative stress, and EPS production, which is necessary for virulence in X. oryzae pv. oryzae.
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