文献类型： 外文期刊

作者： Chen, Li ¹ ; Zhang, Hui ² ; Zhao, Sifeng ¹ ; Xiang, Benchun ¹ ; Yao, Zhaoqun ¹ ;

作者机构： 1.Shihezi Univ, Coll Agr, Key Lab Univ Xinjiang Uygur Autonomous Reg Oasis, Shihezi 832003, Peoples R China

2.Chongqing Acad Agr Sci, Inst Agr Resources & Environm, Chongqing 401329, Peoples R China

关键词： Lipopeptide; Bacillus atrophaeus; Biocontrol efficacy; Cotton rhizoctoniosis

期刊名称：BIOTECHNOLOGY LETTERS （ 影响因子：1.977； 五年影响因子：1.982 ）

ISSN： 0141-5492

年卷期： 2021 年 43 卷 6 期

页码：

收录情况： SCI

摘要： Objectives An assay was conducted to show the comparisons the effects of nine metal ions on antagonistic metabolites (lipopeptides, siderophores and gibberellins) by Bacillus atrophaeus strain B44 using well-diffusion assays, matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS) analysis, chrome azurol S plus mannitol salt agar (CAS-MSA) tests, and reversed-phase high-performance liquid chromatography (RP-HPLC) analysis. This assay is also designed to demonstrate the biocontrol efficacy of B44 against cotton rhizoctoniosis using pot culture tests. Results Both the lipopeptide yield and the antimicrobial activity of B44 increase with the MnSO4, MgSO4, CaCO3, and CuSO4 treatments and either have no effect or decreased lipopeptide yield and antimicrobial activity with the FeSO4, K2HPO4, KCl, KH2PO4 and ZnSO4 treatments. The medium containing MgSO4 has no significant effect on either the lipopeptide yield or antimicrobial activity. MALDI-TOF-MS analysis shows a broad range of m/z peaks, indicating that strain B44 produces a complex mixture of iturin, surfactin, and fengycin lipopeptides. Gibberellin production by strain B44 varies greatly depending on the culture medium, and the siderophore production is not significantly affected by the culture medium. Pot tests show that lipopeptide production affects the disease control efficacy of strain B44. Conclusion The biocontrol efficacy of B. atrophaeus strain B44 is related to the lipopeptide yield. Moreover, B. atrophaeus strain B44 significantly increases the size of cotton seedlings, which is related to the GA(3) concentration.