The influence of metabolites of oat plants on the growth and development of the of pathogenic Bipolaris sorokiniana (Sacc. in Sorokin) Shoemaker

Abstract

The root system of oat plants releases into the rhizosphere soil a significant amount of potentially valuable
biologically active allelopathic substances, which are components of the donor-acceptor interaction between plants
and microorganisms in agrocenoses. Root exometabolites of oat plants exert an active chemical influence on poorly
soluble mineral substances of the soil, participate in the biodynamics of organic matter, affect the composition and
number of mycobiota, and also suppress pathogens, inactivate toxins and exoenzymes released by fungi into the
environment, inhibit fungal sporulation. During the 2020–2022 research years, was studied the role exometabolites
of oat plants the Tembre variety, grown using different technologies, in allelopathic relationships with micromycetes
of the species Bipolaris sorokiniana (Sacc. in Sorokin) Shoemaker. It was established that the metabolites of oats
the Tembre variety, grown according to organic technology, significantly influenced the cultural and morphological
properties of the studied micromycete, and also restrained its sporulation and was characterized by a low
percentage of germinating conidia (20 %). Exometabolites of oat plants the Tembre variety, grown according to
traditional technology, also changed the cultural and morphological characteristics of the micromycete, restrained
sporulation of the pathogen and were characterized by low germination the conidia (35 %). In the control version,
intensive development of the studied micromycete was observed with high rates of sporulation and up to 80% germinated
conidia. On the basis of research, the exometabolites of oat plants grown using different technologies can
be considered one of the mechanisms the influence of the plant variety on the intensity of phytopathogenic
background formation in agrocenoses. This it possible to use exometabolites of germinating donor seeds to increase
the resistance of acceptor agricultural plants to diseases caused by phytopathogenic micromycetes.