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Lipopeptides, a novel protein, and volatile compounds contribute to the antifungal activity of the biocontrol agent Bacillus atrophaeus CAB-1

文献类型： 外文期刊

作者： Zhang, Xiaoyun 1 ; Li, Baoqing 1 ; Wang, Ye; Guo, Qinggang 1 ; Lu, Xiuyun 1 ; Li, Shezeng 1 ; Ma, Ping 2 ;

作者机构： 1.Hebei Acad Agr & Forestry Sci, Inst Plant Protect, Integrated Pest Management Ctr Hebei Prov, Key Lab IPM Crops Northern Reg North China,Minist, Baoding 071000, Peoples R China

2.Hebei Acad Agr & Forestry Sci, Inst Plant Protect, Integrated Pest Management Ctr Hebei Prov, Key Lab IPM Crops Northern Reg North Chi

关键词： Antifungal protein;Bacillus atrophaeus;Lipopeptides;Volatile compound

期刊名称：APPLIED MICROBIOLOGY AND BIOTECHNOLOGY （ 影响因子：4.813； 五年影响因子：4.697 ）

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收录情况： SCI

摘要： Bacillus atrophaeus CAB-1 displays a high inhibitory activity against various fungal pathogens and suppresses cucumber powdery mildew and tomato gray mold. We extracted and identified lipopeptides and secreted proteins and volatile compounds produced by strain CAB-1 to investigate the mechanisms involved in its biocontrol performance. In vitro assays indicated all three types of products contributed to the antagonistic activity against the fungal pathogen Botrytis cinerea. Each of these components also effectively prevented the occurrence of the cucumber powdery mildew caused by Sphaerotheca fuliginea under greenhouse conditions. Matrix-assisted laser desorption ionization time-of-flight mass spectrometry revealed that the major bioactive lipopeptide was fengycin A (C15-C17). We isolated the crude-secreted proteins of CAB-1 and purified a fraction with antifungal activity. This protein sequence shared a high identity with a putative phage-related pre-neck appendage protein, which has not been reported as an antifungal factor. The volatile compounds produced by CAB-1 were complex, including a range of alcohols, phenols, amines, and alkane amides. O-anisaldehyde represented one of the most abundant volatiles with the highest inhibition on the mycelial growth of B. cinerea. To our knowledge, this is the first report on profiling three types of antifungal substances in Bacilli and demonstrating their contributions to plant disease control.

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[1]The PhoR/PhoP two-component system regulates fengycin production in Bacillus subtilis NCD-2 under low-phosphate conditions. Guo Qing-gang,Dong Li-hong,Wang Pei-pei,Li She-zeng,Zhao Wei-song,Lu Xiu-yun,Zhang Xiao-yun,Ma Ping. 2018

[2]DegQ regulates the production of fengycins and biofilm formation of the biocontrol agent Bacillus subtilis NCD-2. Wang, Peipei,Wang, Peipei,Guo, Qinggang,Li, Shezeng,Lu, Xiuyun,Zhang, Xiaoyun,Ma, Ping,Ma, Yinan.

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