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BACILLUS AMYLOLIQUEFACIENS Lx-11, A POTENTIAL BIOCONTROL AGENT AGAINST RICE BACTERIAL LEAF STREAK

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文献类型：外文期刊

作者： Zhang, R. S. ¹ ; Liu, Y. F. ² ; Luo, C. P. ² ; Wang, X. Y. ² ; Liu, Y. Z. ² ; Qiao, J. Q. ² ; Yu, J. J. ² ; Chen, Z. Y. ¹ ;

作者机构： 1.Nanjing Agr Univ, Minist Agr, Key Lab Monitoring & Management Crop Dis & Pest I, Dept Pesticide Sci,Coll Plant Protect, Nanjing 210095, Jiangsu, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210014, Peoples R China

关键词： Bacillus amyloliquefaciens;bacterial leaf streak;lipopeptides;defense-related genes;biological control

期刊名称：JOURNAL OF PLANT PATHOLOGY （影响因子：1.729；五年影响因子：1.681 ）

ISSN： 1125-4653

年卷期： 2012 年 94 卷 3 期

页码：

收录情况： SCI

摘要： A strain of Bacillus amyloliquefaciens denoted Lx-11 was found to possess biocontrol activity against rice bacterial leaf streak (BLS) caused by Xanthomonas oryzae pv. oryzicola. Lx-11 secreted three kinds of lipopeptides including surfactin, bacillomycin D and fengycin, which exhibted antibacterial activity against X. oryzae pv. oryzicola. The antibacterial activity could be associated with surfactin-lipopeptides, and was practically abolished in surfacin-deficient mutants. In addition, the defense-related genes PR-1a, PR-1b, NPR1 and PAL were concurrently expressed in the leaves of rice after treatment with Lx-11. Results suggest that Lx-11 triggers a systemic immunization activity. Lx-11 significantly reduced the incidence of BLS, control efficacy ranging from 60.2% to 70.6%, i.e. better than that afforded by bismerthlazol in field experiments. We conclude that B. amyloliquefaciens Lx-11 might be a promising biocontrol agent and should be further studied.

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BACILLUS AMYLOLIQUEFACIENS Lx-11, A POTENTIAL BIOCONTROL AGENT AGAINST RICE BACTERIAL LEAF STREAK

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