首页> 外文期刊>Canadian journal of microbiology >Characterization and sequence analysis of potential biofertilizer and biocontrol agent Bacillus subtilis strain SEM-9 from silkworm excrement
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Characterization and sequence analysis of potential biofertilizer and biocontrol agent Bacillus subtilis strain SEM-9 from silkworm excrement

机译:来自蚕粪便潜在生物元和嗜菌和生物防治药物菌株SEM-9的表征及序列分析

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摘要

Fusarium wilt is a devastating soil-borne disease caused mainly by highly host-specific formae speciales of Fusarium oxysporum. Antagonistic microorganisms play a very important role in Fusarium wilt control, and the isolation of potential biocontrol strains is becoming more and more important. We isolated a bacterial strain (SEM-9) from the high-temperature stage of silkworm excrement composting, which had a marked ability to solubilize phosphorus, promote the growth and increase the yield of the small Chinese cabbage, and which also exhibited considerable antagonistic effect towards Fusarium sambucinum and other fungi. The result of physiological and biochemical analyses, as well as genome sequencing, showed that SEM-9 was a strain of Bacillus subtilis. Through genome annotation and analysis, it was found that SEM-9 contained genes related to the regulation of biofilm formation, which may play an important role in colonization, and gene clusters encoding the biosynthesis of antimicrobials, such as surfactin, bacilysin, fengycin, and subtilosin-A. The production of such antifungal compounds may constitute the basis of the mode-of-action of SEM-9 against Fusarium spp. These data suggested that the SEM-9 strain has potential as both a biofertilizer and a biocontrol agent, with the potential to manage Fusarium wilt disease in crops.
机译:Fusarium Wilt是一种毁灭性的土壤传播疾病,主要由镰刀菌的高度宿主特异性的Formae特征引起。拮抗微生物在枯萎病中发挥着一种非常重要的作用,潜在的生物防治菌株的分离变得越来越重要。我们从蚕粪堆肥的高温阶段分离细菌菌株(SEM-9),其具有溶解磷的显着能力,促进生长并提高小型大白菜的产量,并表现出相当大的拮抗作用朝向镰刀菌和其他真菌。生理和生物化学分析的结果以及基因组测序表明SEM-9是枯草芽孢杆菌的菌株。通过基因组注释和分析,发现与生物膜形成调节有关的SEM-9包含的基因,这可能在殖民化中发挥重要作用,以及编码抗微生物生物合成的基因簇,例如Surfactin,Bacilysin,Fengycin和枯草芽孢杆菌-A。这种抗真菌化合物的生产可以构成SEM-9对镰刀菌SPP的作用模式的基础。这些数据表明,SEM-9菌株具有潜在的生物插座和生物控制剂,具有在作物中管理镰刀菌枯萎病的潜力。

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