Antagonistic activity of Bacillus velezensis

Abstract

A large number of synthetic pesticides have been developed to combat phytopathogenic bacteria and fungi, but their use is economically unprofi table and harms the environment. The aim of this study was to evaluate the antagonistic properties of Bacillus velezensis HR13 bacteria in relation to cultures of phytopathogenic bacteria and fungi, as well as the ability to produce cyclic lipopeptides, which have antimicrobial activity. It is shown that strain B. velezensis HR13 has a pronounced antagonistic eff ect against fungi that cause plant infections: Absidia corymbifera, Aspergillus fl avus, A. niger, A. tubingensis, Fusarium oxysporum, F. equiseti, Phoma fungicola, Rhizopus sp. The strain B. velezensis HR13 does not show antagonism to phytopathogenic gram-negative bacteria of the genus Pseudomonas. A preparation of cyclic lipopeptide surfactin was obtained by thin-layer chromatography and Fourier-transform infrared spectroscopy.

Keywords

• bacillus velezensis
• antagonistic activity
• cyclic lipopeptides