| Summary: | Currently, studies on the use in agriculture of microbial preparations based on plant growth-promoting rhizobacteria are of increasing interest. Mutualistic relationships between microorganisms and plants contribute to increasing the productive potential, immune status of crops. Deciphering of the plant microbiome, the search for effective microsymbionts and the introduction of rhizobacteria into the rhizosphere of plants are current and promising research areas for solving the problem of biologization of agricultural technologies for their cultivation. The purpose of the study was to study the effect of associative bacterial strains on the structure of the microbiocenosis of the rhizosphere and the productivity of winter wheat in the conditions of southern chernozem. The effect of strains associated with Triticum aestivum on the structure of the rhizosphere of winter wheat under the conditions of a field experiment on chernozem southern of the steppe zone of Crimea was established. A metagenomic analysis of the rhizosphere of the varieties Ermak and Bagheera showed the presence of 18 phyla. Seven phyla of prokaryotes: Thaumarchaeota, Acidobacteria, Actinobacteria, Bacteroidetes, Firmicutes, Proteobacteria, and Verrucomicrobia were included in the dominant composition (share above 1%). The positive effect of newly isolated strains of bacteria associated with T. aestivum on plant development was shown.
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