文献类型： 外文期刊
作者： Zhu, Yan 1 ; Li, Yanhong 1 ; Hu, Ronghui 1 ; Zheng, Yani 1 ; Feng, Na 1 ; Chen, Fu 2 ; Wang, Jing 3 ; Li, Hongyu 1 ;
作者机构： 1.Lanzhou Univ, MOE Key Lab Arid & Grassland Ecol, Sch Life Sci, Lanzhou 730000, Peoples R China
2.Gansu Acad Agr Sci, Inst Potato, Lanzhou 730070, Peoples R China
3.Gansu Agr Univ, Coll Food Sci & Engn, Lanzhou 730070, Peoples R China
关键词： Cowpea;Hydrogen peroxide;Plant-pathogen interaction;Rifampicin;Xanthomonas campestris pv. phaseoli
期刊名称：AUSTRALASIAN PLANT PATHOLOGY （ 影响因子：1.599； 五年影响因子：1.708 ）
ISSN： 0815-3191
年卷期： 2012 年 41 卷 1 期
页码：
收录情况： SCI
摘要： To assay hydrogen peroxide (H(2)O(2)) production by phytopathogenic bacteria in vivo, cowpea seedlings were inoculated using wild-type Xanthomonas campestris pv. phaseoli and its mutant strain on ahpC (with attenuated H(2)O(2) production). Antibiotic rifampicin (Rif) was used to kill off the Xanthomonas campestris pv. phaseoli in cowpea leaves. The optimal concentration of Rif to eradicate the bacteria was 500 mu g mL(-1), and duration of the Rif treatment to eradicate the bacteria in the cowpea tissues was 48 h. This level of Rif did not significantly affect chloroplast and mitochondrial function in cowpea leaves. The concentration of H(2)O(2) in cowpea inoculated with wild-type or mutant strain of Xanthomonas campestris pv. phaseoli following Rif treatment was measured. Increased H(2)O(2) accumulation was observed in cowpea leaves respectively inoculated with wild-type and mutant strain. The accumulation of excess H(2)O(2) was significantly decreased by the Rif treatment on cowpea wild-type bacteria systems. However, the level of H(2)O(2) in cowpea leaves inoculated with mutant strains following Rif treatment was at the same level as in plant leaves without Rif treatment. The results demonstrate that the change in H(2)O(2) concentration observed in vivo was caused by wild-type bacteria.
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