The Role of a Host-Induced Arginase of Xanthomonas oryzae pv. oryzae in Promoting Virulence on Rice
文献类型： 外文期刊
作者： Zhang, Yuqiang 1 ; Wu, Guichun 3 ; Palmer, Ian 4 ; Wang, Bo 1 ; Qian, Guoliang 1 ; Fu, Zheng Qing 4 ; Liu, Fengquan 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Plant Protect, Dept Plant Pathol, Nanjing 210095, Jiangsu, Peoples R China
2.Nanjing Agr Univ, Minist Educ, Key Lab Integrated Management Crop Dis & Pests, Nanjing 210095, Jiangsu, Peoples R China
3.Jiangsu Acad Agr Sci, Jiangsu Key Lab Food Qual & Safety, State Key Lab Cultivat Base, Inst Plant Protect,Minist Sci & Technol, Nanjing 210014, Jiangsu, Peoples R China
4.Univ South Carolina, Dept Biol Sci, Columbia, SC 29208 USA
5.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212013, Jiangsu, Peoples R China
期刊名称：PHYTOPATHOLOGY （ 影响因子：4.025； 五年影响因子：4.394 ）
ISSN： 0031-949X
年卷期： 2019 年 109 卷 11 期
页码：
收录情况： SCI
摘要： The plant bacterial pathogen Xanthomonas oryzae pv. oryzae causes bacterial blight of rice, which is one of the most destructive rice diseases prevalent in Asia and parts of Africa. Despite many years of research, how X. oryzae pv. oryzae causes bacterial blight of rice is still not completely understood. Here, we show that the loss of the rocF gene caused a significant decrease in the virulence of X. oryzae pv. oryzae in the susceptible rice cultivar IR24. Bioinformatics analysis demonstrated that rocF encodes arginase. Quantitative real-time PCR and Western blot assays revealed that rocF expression was significantly induced by rice and arginine. The rocF deletion mutant strain showed elevated sensitivity to hydrogen peroxide, reduced extracellular polysaccharide (EPS) production, and reduced biofilm formation, all of which are important determinants for the full virulence of X. oryzae pv. oryzae, compared with the wild-type strain. Taken together, the results of this study revealed a mechanism by which a bacterial arginase is required for the full virulence of X. oryzae pv. oryzae on rice because of its contribution to tolerance to reactive oxygen species, EPS production, and biofilm formation.
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