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Isolation, Identification, and Complete Genome Assembly of an Endophytic Bacillus velezensis YB-130, Potential Biocontrol Agent Against Fusarium graminearum

文献类型： 外文期刊

作者： Xu, Wen 1 ; Zhang, Liyong 1 ; Goodwin, Paul H. 3 ; Xia, Mingcong 1 ; Zhang, Jie 1 ; Wang, Qi 4 ; Liang, Juan 1 ; Sun, Run 1 ;

作者机构： 1.Henan Acad Agr Sci, Henan Int Joint Lab Crop Protect, Henan Biopesticide Engn Res Ctr, Inst Plant Protect Res, Zhengzhou, Peoples R China

2.Henan Agr Univ, Coll Life Sci, Zhengzhou, Peoples R China

3.Univ Guelph, Sch Environm Sci, Guelph, ON, Canada

4.China Agr Univ, Coll Plant Protect, Beijing, Peoples R China

关键词： Bacillus velezensis; Fusarium graminearum; DON; biocontrol agent; genome sequencing and assembly

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.64； 五年影响因子：6.32 ）

ISSN： 1664-302X

年卷期： 2020 年 11 卷

页码：

收录情况： SCI

摘要： Wheat scab caused by F. graminearum is a highly destructive disease that leads to yield reduction and mycotoxin contamination of grains. In this study, an endophytic bacterium of strain YB-130 was isolated from surface sterilized wheat spikes with scab symptoms and identified as Bacillus velezensis by whole genome annotation, 16S rRNA gene and average nucleotide identities analysis. The whole-genome sequence of strain YB-130 was obtained by PacBio sequencing. 88 putative Carbohydrate-Active Enzymes and 12 gene clusters encoding for secondary metabolites were identified in the YB-130 genome, including one gene cluster for the synthesis of lanthipeptide only found in strain YB-130 genome. In dual cultures, strain YB-130 significantly inhibited the growth of F. graminearum PH-1 and other eight fungal plant pathogens, indicating a broad antifungal activity. Furthermore, strain YB-130 was able to significantly inhibit spore morphology and hyphal development of F. graminearum PH-1. Strain YB-130 also reduced deoxynivalenol production by F. graminearum PH-1 in dual cultures, possibly due to its ability to suppress the expression of tri5, tri3, and tri8 that are required for deoxynivalenol production in F. graminearum. Overall, B. velezensis YB-130 is a promising biological control agent of both F. graminearum infection and mycotoxin production.

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