April 21, 2020  |  

Depiction of secondary metabolites and antifungal activity of Bacillus velezensis DTU001.

Authors: Devi, Sagarika and Kiesewalter, Heiko T and Kovács, Renátó and Frisvad, Jens Christian and Weber, Tilmann and Larsen, Thomas Ostenfeld and Kovács, Ákos T and Ding, Ling

For a safe and sustainable environment, effective microbes as biocontrol agents are in high demand. We have isolated a new Bacillus velezensis strain DTU001, investigated its antifungal spectrum, sequenced its genome, and uncovered the production of lipopeptides in HPLC-HRMS analysis. To test the antifungal efficacy, extracts of B. velezensis DTU001 was tested against a range of twenty human or plant pathogenic fungi. We demonstrate that inhibitory potential of B. velezensis DTU001 against selected fungi is superior in comparison to single lipopeptide, either iturin or fengycin. The isolate showed analogous biofilm formation to other closely related Bacilli. To further support the biocontrol properties of the isolate, coculture with Candida albicans demonstrated that B. velezensis DTU001 exhibited excellent antiproliferation effect against C. albicans. In summary, the described isolate is a potential antifungal agent with a broad antifungal spectrum that might assist our aims to avoid hazardous pathogenic fungi and provide alternative to toxicity caused by chemicals.

Journal: Synthetic and systems biotechnology
DOI: 10.1016/j.synbio.2019.08.002
Year: 2019

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