Phenotypic and molecular characterization of rhizobacterium Burkholderia sp strain R456 antagonistic to Rhizoctonia solani, sheath blight of rice

文献类型： 外文期刊

第一作者： Li, Bin

作者： Li, Bin;Liu, Bao-Ping;Lou, Miao-Miao;Xie, Guan-Lin;Li, Hong-Ye;Yu, Rong-Rong;Wang, Yan-Li;Sun, Guo-Chang

作者机构：

关键词： fatty acid methyl ester: carbon source;molecular characterization;phenotypic characterization;hypersensitivity reaction;GenBank sequence database

期刊名称：WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY （ 影响因子：3.312； 五年影响因子：3.58 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The effect of rhizobacterium Burkholderia sp. strain R456 on the inhibition of Rhizoctonia solani, sheath blight of rice was examined. Results from this study indicated that strain R456 not only suppressed the in vitro mycelial growth of R. solani, but also reduced the incidence and severity of rice sheath blight under greenhouse conditions. However, similar to plant pathogenic strain LMG 1222(T) of Burkholderia cepacia, the type species of the genus, infiltration of tobacco leaves with cell suspension of strain R456 resulted in typical hypersensitivity reactions while the two bacterial strains were unable to cause disease symptoms on rice seedlings. The fatty acid methyl ester profile, sole carbon source utilization, and biochemical tests confirmed that the antagonistic rhizobacterium R456 is a member of the genus Burkholderia. Furthermore, strain R456 was differentiated from B. cepacia LMG 1222(T) and was identified as Burkholderia seminalis based on recA gene sequence analysis and multilocus sequence typing. In addition, this rhizobacterium had a lower proteolytic activity compared with that of the pathogenic B. cepacia LMG 1222(T) while no cblA and esmR marker genes were detected for the two bacterial strains. Overall, this is the first characterization of rhizobacterium B. seminalis that protected rice seedlings from infection by R. solani.

分类号： Q93

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