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Aim of the study: to study the microbial communities and sulfate-reducing bacteria of soils collected from the surfaces of the gas-pipeline. Methods: microbiological, biochemical, molecular biological. Results: In the microbial communities of soils near the main-gas pipeline “Soyuz” (Ivano-Frankivsk region, Ukraine) were appeared such microorganisms as iron-reducing, tionic denitrifying, ammonifying, denitrifying and diazotrophic bacteria among them were dominated sulfate-reducing bacteria. It were obtained 4 pure cultures of the sulfate-reducing bacteria and was determined culturalmorphological and physiological-biochemical characteristics of bacteria. In the fatty acid components of sulfate-reducing bacteria were identified 14 fatty acids with chain length from C10 to C18. According to partial sequence of the 16S rRNA gene the K1 isolate has 90% homology with the sequence of Desulfovibrio desulfuricans ATCC 27774 (NR074858.1), K2 isolate – 92% homology with Desulfovibrio sp. D4 (AF192155) K1/3 isolate has 95% homology with Desulfotomaculum kuznetsovii DSM 6115 (CP002770.1). Conclusion: According to the phenotypic, chemotaxonomic and molecular genetic characteristics bacteria isolated from soils near main-gas pipeline were related to the genera Desulfovibrio, Desulfotomaculum.

Microbial Communities and Sulphate-Reducing Bacteria in Soils Near Main-Gas Pipeline