NEW PSYCHROACTIVE BACTERIA OF THE YAMAL PENINSULA CRYOPEGS
Ya.V. Ryzhmanova1, V.E. Trubitsyn1, E.M. Rivkina1, N.E. Suzina1, A.O. Plotnikov2, V.Ya. Kataev2, M.V. Molchanov3, N.V. Molochkov3, V.A. Shcherbakova1
1Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, Pushchino, Russia
2Institute for Cellular and Intracellular Symbiosis of the Ural Branch of the Russian Academy of Sciences, Orenburg, Russia
3Institute of Theoretical and Experimental Biophysics of the Russian Academy of Sciences, Pushchino, Russia
Keywords: permafrost, cryopeg, Yamal, sulfate-reducing bacteria, psychrophiles, Acetobacterium, Labilibaculum, Trichococcus
Abstract
New data on the species diversity and metabolic potential of insufficiently studied microbial communities in cryopegs of the Yamal Peninsula are presented. The total number of microorganisms inhabiting cryopegs is high and reaches 106-108 cells/mL. At the same time, sulfate-reducing bacteria have only been found in two out of three studied cryopegs in numbers not exceeding 103 cells/mL. Representatives of the bacterial genera Acetobacterium (strains K1/0, K1/6 =VKM B-3638, K1/7, K1/8), Labilibaculum (K2ST, =VKM B-3650T), and Trichococcus (K1TrT, =VKM B-3651Т) have been isolated from cryopegs for the first time. All isolates are psychroactive and are able to grow at 6°C.
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