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| Content Provider | Springer Nature Link |
|---|---|
| Author | Garva, Elena S. Zhilina, Tatjana N. Tourova, Tatjana P. Lysenko, Anatoli M. |
| Copyright Year | 2003 |
| Abstract | New alkaliphilic anaerobic fermentative bacteria, strains Z-7981 and Z-7981′, with Gram-positive cell walls, were isolated from the cellulolytic community from the soda lake Nizhnee Beloye, south-east of Baikal. Cells were motile rods, which differed in dimensions but, according to 98% DNA/DNA homology, belonged to the same species. Strain Z-7981 was chosen as the type and studied in detail. It did not produce spores and its cells were non-thermoresistant. It was a true alkaliphile with a growth range from pH 7.1 to pH 10.1 and optimal pH for growth at pH 9.1. It was obligately dependent on Na+ and carbonate ions but not on Cl−. Growth occurred in media with total sodium content from 0.076 M to 1.27 M Na+ with a broad optimum from 0.25 to 0.86 M Na+. Growth showed an optimum at 35°C, with absence of growth above 46°C. The organism was aerotolerant and was capable of fermentation in non-reducing medium at less than 4.75% O2 in the gas phase. Strain Z-7981 fermented mono- and disaccharides, sugar alcohols, but only glutamate and cysteine among the amino acids, and the proteinaceous substrates, chitin and dried Spirulina biomass. Fermentation products were acetate and ethanol. Fe3+ was reduced in a process that yielded no energy. Phylogenetically the new organism belonged to cluster XI of the Gram-positive bacteria with low G+C content and its closest neighboring taxon was Tindallia magadiensis. However, according to its phenotypic and genotypic characters it did not belong to any known genus from this group. We suggest a new genus and species with the name Anoxynatronum sibiricum and strain Z-7981 as its type (=DSM15060). |
| Starting Page | 213 |
| Ending Page | 220 |
| Page Count | 8 |
| File Format | |
| ISSN | 14310651 |
| Journal | Extremophiles |
| Volume Number | 7 |
| Issue Number | 3 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2003-02-19 |
| Publisher Place | Tokyo |
| Access Restriction | One Nation One Subscription (ONOS) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Molecular Medicine Microbiology |
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