Thermophilic facultative anaerobic bacteria of the genus Geobacillus from bottom sediments of Lake Baikal
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Lake Baikal
thermophilic bacteria
methane seepage
Posolsk Bank
Geobacillus sp.

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Khanaeva, T. A., Pavlova, O. N., Chernitsyna, S. M., Khalzov, I. A., Khabuev, A. V., Nikonova, A. A., Novikova, A. S., & Zemskaya, T. I. (2017). Thermophilic facultative anaerobic bacteria of the genus Geobacillus from bottom sediments of Lake Baikal. Acta Biologica Sibirica, 3(3), 39-46.


Pure culture of thermophilic facultative anaerobic microorganism was isolated from surface sediment of methane seepage Posolsk Bank. New strain Geobacillus sp. PB15/Grf7geo does not differ from the typical strains by morphological and physiological-biochemical properties. It is able to withstand of wide temperature range with optimum growth between 55–60 °C. Chemoorganotroph. Phylogenetic analysis of the 16S rRNA sequence of the strain showed 97 % identity to cultivated strains of this genus. The strain forms a common clade with uncultivated representatives and does not cluster with sequences of cultivated strains within the genus Geobacillus in the phylogenetic tree. Strain Geobacillus sp. PB15/Grf7geo has been deposited to the collection of the VKM (=VKM B–3150T).
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