Metabolite-associated enzymatic properties of microorganisms with an antagonistic effect on Aspergillus and Fusarium fungi, pathogenic for crops and farm animals

Abstract

Mycotoxins are secondary metabolites of toxin-forming fungi. Contamination of agricultural products with mycotoxins can occur both in the field and during storage, if the conditions for the growth and development of fungi. The impact of mycotoxins on human and animal health is manifested in the form of acute mycotoxicosis. In modern agriculture, the most promising detoxification technology for food raw materials uses bacteria that have an antagonistic effect to micromycetes. For a better understanding of these mechanisms and with the aim of further more effective control of pollution, mycotoxin studies to assess the enzymatic properties of previously selected microorganisms-antagonists of toxin-forming microscopic fungi. In the study of amylolytic, proteolytic, lipolytic, cellulosolytic activity and the ability to produce catalase and chitinase, microorganisms with all the properties were not identified. Bacteria RPF1, RPF2, RPA3, PA4, PA7, PA8, RCF11, SB10, SB13, SB15, SB16, SB20 had activity in 3-4 groups of hydrolytic enzymes. The isolates PF7, RCF8, SB11, SB17 showed the maximum activity according to the studied parameters. From these microorganisms, an association of bacteria was created to suppress the growth and development of pathogenic micromycetes.