Abstract

The results of the phylogenetic analysis and analysis of the physiological characteristics of metabolic activity of strains isolated from frozen sedimentary rocks collected in the Antarctic and the Severnaya Zemlya archipelago are reported in this article. A comparable abundance of cultured cells and close morphological diversity of colony morphotypes were revealed in all samples. Representatives of the Actinobacteria and Firmicutes phyla were predominant in the cultured bacterial communities. These communities were characterized by mesophilic and neutrophilic optima, as well as by the wide ranges of temperatures and pH suitable for metabolic activity. Moderate halotolerance in the presence of sodium or potassium chloride, as well as the high inhibitory effect of sodium hydrocarbonate and low inhibitory effect of magnesium sulfate, were revealed. The communities were highly resistant to the presence of 5% magnesium perchlorate in the culture medium. Strains resistant to antibiotics in the composition of the medium were revealed: The isolated strains were the most resistant to ampicillin, chloramphenicol, and cephalexin.

中文翻译：

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从低温干旱土壤中分离出来的可培养细菌群落：系统发育和生理特征

摘要

本文报道了从南极和塞韦尔纳亚泽姆利亚群岛收集的冷冻沉积岩中分离的菌株的系统发育分析结果和生理活性的分析结果。在所有样品中都显示了相当数量的培养细胞和紧密的菌落形态型多样性。放线菌和菌丝的代表在培养的细菌群落中，多数为门。这些群落的特征是嗜温和嗜中性最佳，以及适于代谢活性的宽范围温度和pH。揭示了在氯化钠或氯化钾存在下中等耐盐性，以及碳酸钠的高抑制作用和硫酸镁的低抑制作用。社区对培养基中5％高氯酸镁的存在具有高度抗性。揭示了在培养基组成中对抗生素具有抗性的菌株：分离出的菌株对氨苄西林，氯霉素和头孢氨苄最有抗性。