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| Content Provider | Springer Nature Link |
|---|---|
| Author | Blum, Jodi Switzer Kulp, Thomas R. Han, Sukkyun Lail, Brian Saltikov, Chad W. Stolz, John F. Miller, Laurence G. Oremland, Ronald S. |
| Copyright Year | 2012 |
| Abstract | A haloalkaliphilic sulfate-respiring bacterium, strain SLSR-1, was isolated from a lactate-fed stable enrichment culture originally obtained from the extreme environment of Searles Lake, California. The isolate proved capable of growth via sulfate-reduction over a broad range of salinities (125–330 g/L), although growth was slowest at salt-saturation. Strain SLSR-1 was also capable of growth via dissimilatory arsenate-reduction and displayed an even broader range of salinity tolerance (50–330 g/L) when grown under these conditions. Strain SLSR-1 could also grow via dissimilatory nitrate reduction to ammonia. Growth experiments in the presence of high borate concentrations indicated a greater sensitivity of sulfate-reduction than arsenate-respiration to this naturally abundant anion in Searles Lake. Strain SLSR-1 contained genes involved in both sulfate-reduction (dsrAB) and arsenate respiration (arrA). Amplicons of 16S rRNA gene sequences obtained from DNA extracted from Searles Lake sediment revealed the presence of close relatives of strain SLSR-1 as part of the flora of this ecosystem despite the fact that sulfate-reduction activity could not be detected in situ. We conclude that strain SLSR-1 can only achieve growth via arsenate-reduction under the current chemical conditions prevalent at Searles Lake. Strain SLSR-1 is a deltaproteobacterium in the family Desulfohalobiacea of anaerobic, haloalkaliphilic bacteria, for which we propose the name Desulfohalophilus alkaliarsenatis gen. nov., sp. nov. |
| Starting Page | 727 |
| Ending Page | 742 |
| Page Count | 16 |
| File Format | |
| ISSN | 14310651 |
| Journal | Extremophiles |
| Volume Number | 16 |
| Issue Number | 5 |
| e-ISSN | 14334909 |
| Language | English |
| Publisher | Springer Japan |
| Publisher Date | 2012-06-29 |
| Publisher Place | Japan |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Alkaliphile ecology Systematics Anaerobic bacteria Metaloxidation and reduction Halophiles Ecology Biotechnology Phylogeny Genetics Taxonomy Enzymes Microbiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Molecular Medicine Microbiology |
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