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Novel halotolerant bacterium from cryopeg in permafrost: Description of Psychrobacter muriicola sp. nov.

Shcherbakova, V. ; Chuvil’skaya, N. ; Rivkina, E. ; Pecheritsyna, S. ; Suetin, S. ; Laurinavichius, K. ; Lysenko, A. ; Gilichinsky, D.

Microbiology, 2009, Vol.78(1), pp.84-91 [Periódico revisado por pares]

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  • Título:
    Novel halotolerant bacterium from cryopeg in permafrost: Description of Psychrobacter muriicola sp. nov.
  • Autor: Shcherbakova, V. ; Chuvil’skaya, N. ; Rivkina, E. ; Pecheritsyna, S. ; Suetin, S. ; Laurinavichius, K. ; Lysenko, A. ; Gilichinsky, D.
  • Assuntos: cryopegs ; Psychrobacter muriicola ; salinity ; negative temperature
  • É parte de: Microbiology, 2009, Vol.78(1), pp.84-91
  • Descrição: A novel halotolerant psychrotrophic gram-negative bacterium, strain 2pS, was isolated from lenses of water brine in Arctic permafrost (cryopeg). The optimal growth of the new strain was observed at 16–18°C; the maximal and minimal growth temperatures were 37°C and −2°C, respectively. The pH growth range was 5.8 to 8.5 (optimum 6.5–7.5) and the range of medium salinity was 0 to 100 g/l (optimum 3–8 g/l NaCl). The strain 2pS did not produce acid from carbohydrates and utilized acetate, yeast extract, pyruvate, glutarate, fumarate, caproate, heptanoate, butyrate, malate, DL-lactate, citrate, L-proline, L-tyrosine, butanol, and dulcitol as the sole carbon and energy sources. The major fatty acids of the cell wall at optimal growth temperature were C 18:1 ω7 and C 18:1 ω9. The G+C DNA base content was 46.0 mol.%. Phylogenetic analysis of the 16S rRNA gene sequences showed that the studied strain was the closest (97% similarity) to Psychrobacter nivimaris DSM 16093 T , a halotolerant psychrotrophic bacterium isolated from the Arctic sea’s ice. Genotypic and phenotypic differences of the new bacterium from closely related species lead to the conclusion that strain 2pS belongs to a novel species of the genus Psychrobacter: Psychrobacter muriicola sp. nov.
  • Idioma: Inglês

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