NDLI: Anaerobic, alkaliphilic, saccharolytic bacterium Alkalibacter saccharofermentans gen. nov., sp. nov. from a soda lake in the Transbaikal region of Russia

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Anaerobic, alkaliphilic, saccharolytic bacterium Alkalibacter saccharofermentans gen. nov., sp. nov. from a soda lake in the Transbaikal region of Russia

Content Provider	Springer Nature Link
Author	Garva, Elena S. Zhilina, Tatjana N. Tourova, Tatjana P. Kostrikina, Nadezhda A. Zavarzin, Georgy A.
Copyright Year	2004
Abstract	Three strains of new obligately anaerobic alkaliphilic bacteria have been isolated as a saccharolytic component from the cellulolytic community of alkaline Lake Nizhnee Beloe (Transbaikal region, Russia), a lake with low salt concentration. DNA analysis of these strains showed an interspecies level of DNA similarity of 96–100%. Strain Z-79820 was selected for further investigations. Cells were Gram-positive, asporogenous, nonmotile short rods with pointed ends. The strain was a true alkaliphile: growth occurred from pH 7.2 to 10.2 with the optimum at pH 9.0. Strain Z-79820 was halotolerant and could grow in medium with up to 10% (w/v) NaCl, with the optimum between 0 and 4% NaCl. The new isolate obligately depended on Na+ ions in the form of carbonates or chlorides. Total Na+ content needed for optimal growth was 0.46 M Na+, with a wide range from 0.023–0.9 M Na+ at which growth also occurred. The isolate was a mesophile and grew at temperatures from 6 to 50°C (slow growth at 6 and 15°C) with an optimum at 35°C. The organotrophic organism fermented ribose, xylose, glucose, mannose, fructose, sucrose, mannitol, and peptone. The products of glucose fermentation were acetate, ethanol, formate, H2, and CO2. Yeast extract was required for some anabolic needs. The DNA G+C content of the type strain Z-79820 was 42.1 mol%. The new bacterium fell into the 16S rRNA gene cluster XV of the Gram-positive bacteria with low G+C content, where it formed an individual branch. Based on its growth characteristics and genotype traits, we propose the new genus and species named Alkalibacter saccharofermentans with the type strain Z-79820 (=DSM14828), Uniqem-218 (Institute Microbiology, RAS; http://inmi.da.ru ).
Starting Page	309
Ending Page	316
Page Count	8
File Format	PDF
ISSN	14310651
Journal	Extremophiles
Volume Number	8
Issue Number	4
e-ISSN	14334909
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-05-01
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	16S rRNA Alkaliphile Anaerobe Saccharolytic bacterium Soda lakes
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Medicine Microbiology

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Anaerobic, alkaliphilic, saccharolytic bacterium Alkalibacter saccharofermentans gen. nov., sp. nov. from a soda lake in the Transbaikal region of Russia

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