Elizaveta Nikolaevna Yurchenko

This research based on both direct and seeding methods revealed high bacteria concentration on bogs plants: Carex nigra, Eriophorum vaginatum, Drosera rotundifolia, Ledum palustre. There was identified a correlation between bacteria number and investigated plants’ organs. Proteobacteria dominated in phyllosphere, bacilli and actinomycetes - in rizoplane and rhizospheric soil. Representatives of the genus Pseudomonas and Erwinia dominated in phyllosphere. Nitrogenase activity of bacterial populations in rhizosphere soil was high and reached the maximum in Drosera rhizospheric soil.

For the first time, the ratio of large taxa and the genera spectrum in the prokaryotic complex of the rhizosphere soil under typical plants of bogs were revealed by high-performance sequencing. The dominance of acidobatheria and alpha-proteobacteria was established with a low proportion of other taxa (less than 10%). Among the 24 bacterial genera found, representatives of the phylums Acidobacteria and Actinobacteria, as well as the Alphaproteobacteria class, predominate. Common bacterial genera were identified in rhizosphere soil under plants and surface layers of peat. Representatives of most of these bacteria are adapted to grow in an acidic environment and at low temperatures. Their functioning is determined by the use of various sugars, polysaccharides, aromatic compounds, organic and amino acids. Bacteria of the genera Cytophaga and Acidothermus are capable of cellulose destruction, Occallatibacter - chitin, Nocardia - humic substances and lignin.