Antibacterial activity of some Bacillus strains in dependence on the culture medium [Articol]

Abstract

Biological control of plant pathogenic bacteria, which includes the use of antagonistic microorganisms, is an alternative method to the application of chemicals. Bacteria belonging to the Bacillus spp. have demonstrated antimicrobial activity against plant pathogenic microorganisms due to the produced secondary metabolites. Thus, it is of particular interest to study and to identify new microorganisms, in particular Bacillus spp., possessing pronounced antimicrobial activity against phytopathogens that can be used as biotechnological alternatives for agriculture, with the production of biologically active preparations based on the microorganism strains or metabolites. From 12 strains of Bacillus spp. three strains, grown on liquid media, were selected and characterized by high antimicrobial activity against pathogenic plant bacteria, both bacterial suspension and cell-free supernatant showed. The selected strains can be proposed as potential bioactive antagonists against phytopathogens, which can be used to obtain bioactive preparations useful for agriculture in the field of plant protection and cell-free supernatant may have prospects for use in the medical field to obtain bioactive preparations due to the ability to produce various secondary metabolites such as antibiotics.