Isolation and identification of Bacillus subtilis strain YB-05 and its antifungal substances showing antagonism against Gaeumannomyces graminis var. tritici
文献类型： 外文期刊
作者： Yang, Lirong 1 ; Quan, Xin 1 ; Xue, Baoguo 1 ; Goodwin, Paul H.; Lu, Shubing 1 ; Wang, Jinhui 1 ; Wei, Du 2 ; Wu, Chao;
作者机构： 1.Henan Acad Agr Sci, Henan Key Lab Control Crop Dis & Insect Pests, IPM Key Lab Southern Part North China, Plant Protect Res Inst,Minist Agr, Zhengzhou 450002, Henan, Peoples R China
2.Henan Acad Agr Sci, Henan Key Lab Control Crop Dis & Insect Pests, IPM Key Lab Southern Part North China, Pla
关键词： Bacillus subtilis;Antagonistic activity;Gaeumannomyces graminis var. tritici;Isolation;Substance identification
期刊名称：BIOLOGICAL CONTROL （ 影响因子：3.687； 五年影响因子：3.962 ）
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收录情况： SCI
摘要： In this study, 98 putative Bacillus strains were isolated from wheat rhizospheric soil. Among the isolated strains, six showed strong inhibitory effects against the wheat take-all pathogen, Gaeumannomyces graminis var. tritici. One of the strains that showed significant inhibitory activity, YB-05, was identified as Bacillus subtilis based on a phylogenetic analysis of its 16S rDNA gene sequence, the results of the PCR analysis and cloning of its antifungal genes, its morphological characteristics and its physiological and biochemical properties. When tested with a dual-culture, cup-disc method and laboratory greenhouse studies, strain YB-05 was found to be superior to chemical treatment for control of the plant pathogen G. graminis var. tritici. After liquid culture, various antimicrobial substances in the culture medium were detected by high-performance liquid chromatography and high-resolution mass spectrometry, and the existence of their corresponding genes was verified by PCR analysis. (C) 2015 Elsevier Inc. All rights reserved.
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