Open AccessTHERMOPHILIC ORGANOTROPHIC BACTERIA OF THE GENUS <i>MEIOTHERMUS</i> IN ALKALINE HYDROTHERMS OF PRIBAIKALYE (BURYATIA)
Author(s) -
Valentina G. Budagaeva,
Д. Д. Бархутова
Publication year - 2015
Publication title -
samarskij naučnyj vestnik
Language(s) - English
Resource type - Journals
eISSN - 2782-3016
pISSN - 2309-4370
DOI - 10.17816/snv20152108
Subject(s) - thermophile , bacteria , bacilli , biology , strain (injury) , botany , facultative , hydrolysis , mesophile , bacillus (shape) , agar plate , hot spring , microbiology and biotechnology , food science , biochemistry , genetics , paleontology , anatomy
Aerobic, facultative anaerobic hydrolytic bacteria are widespread in the sediments and microbial mats of alkaline hot springs in Baikal region (Buryatia). Typical representatives of hydrolytic bacteria are alkalotermophylic bacilli which are capable of utilizing organic matter in alkaline hot spring waters. Two pure cultures of bacteria growing on acetate, pyruvate and soetone were isolated from the microbial mat of Baikal region thermal springs (Buryatia). These strains were non-sporeforming straight or curved rods that morphologically similar to the representatives of the genus Meiothermus. Bacteria on agar medium formed small smooth pink colonies. Ecophysiological properties of isolates are studied (with respect to temperature and pH). Optimal growth temperature of culture Um-14-2-1 was 450C, the temperature range was 35-600C. The temperature range of strain Al-14-3 was 30-60C, with an optimum 50 C. The pH range of strain Um-14-2-1 is 6.5 to 9.5, the optimum of 8.0. The pH range of strain Al-14-3 is 6.5 to 9.5, the optimum of 8.5. Two thermophilic heterotrophic bacteria are similar to the genus Meiothermus by morphophysiological properties and the ability to thermophile, and are moderate thermophiles.