The identification of a bacterial strain BGI-1 isolated from the intestinal flora of Blattella germanica, and its anti-entomopathogenic fungi activity
文献类型： 外文期刊
作者： Huang, Y. H. 1 ; Wang, X. J. 2 ; Zhang, F. 1 ; Huo, X. B. 2 ; Fu, R. S. 1 ; Liu, J. J. 1 ; Sun, W. B. 3 ; Kang, D. M. 2 ; Ji 1 ;
作者机构： 1.Shandong Normal Univ, Coll Life Sci, Key Lab Anim Resistance Res, Jinan 250014, Peoples R China
2.Shandong Ctr Control & Prevent, Jinan 250014, Peoples R China
3.Shandong Acad Agr Sci, Inst Anim Sci Vet Med, Jinan 250100, Peoples R China
关键词： Antifungal activity;Bacillus subtilis;Blattella germanica;Identification;Intestinal flora
期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.381； 五年影响因子：2.568 ）
ISSN：
年卷期：
页码：
收录情况： SCI
摘要： A bacterial strain BGI-1 was isolated from the gut of German cockroaches (Blattella germanica L.) and was identified as Bacillus subtilis based on 16S rDNA sequence and morphological, physiological, and biochemical characters. The strain BGI-1 inhibited the growth of Beauveria bassiana; the diameter of the inhibition zone exceeded 30 mm. Vesicles were observed in B. bassiana hyphae on the edge of the inhibition zone. Fermentation of BGI-1 reduced the conidial germination rate by 12%. Further studies demonstrated that B. bassiana infections in German cockroaches orally treated with the extracts of BGI-1 fermentation were significantly weakened. Cumulative mortality rate was 49.5% in the treatment group at the 20 d, while that of the control group was 62.3%. The study intends to understand the relationship between the intestinal flora and the cockroach. Those microbes with anti-entomopathogenic fungi activity might contribute to resisting the infection of pathogenic fungi.
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