EXOMETALOBITE OF THE VARIETIES OF CULTURAL PLANTS IN ALLELOPATIC RELATIONSHIPS WITH MICROMYCETES OF FUSARIUM LINK GENUS

Abstract

The analysis of the seed material of the studied crops showed certain contamination with pathogenic micromycetes, from which 150 isolates were specified. Among the identified micromycetes, the dominant species were: Fusarium incarnatum, F. solani, F. culmorum, F. oxysporum, F. proliferatum, F. graminearum, F. verticillioides, F. langsethiae. It was established that the highest occurrence frequency of more than 60% characterized by mycomycetes of the species F. oxysporum in wheat and F. proliferatum in onions. It was shown that the properties of the root exometabolites of cultural plants of the tested varieties depend significantly on the genotype of the variety. Exometabolites of Mulan and Skagen winter wheat varieties are able to significantly suppress the mycelial growth of colonies and the intensity of sporulation, as well as the viability of spores of pathogenic strains of F. oxysporum, which was almost 2 times lower than the control. At the same time, the exometabolites of winter wheat plants of Podolyanka and Natalka varieties are able to influence the growth and development of colonies of the F. oxysporum fungus that developed at the control level to a lesser extent.