Dethiobacter alkaliphilus gen. nov. sp. nov., and Desulfurivibrio alkaliphilus gen. nov. sp. nov.: two novel representatives of reductive sulfur cycle from soda lakes

Anaerobic enrichments with H₂ as electron donor and thiosulfate/polysulfide as electron acceptor at pH 10 and 0.6 M total Na⁺ yielded two non sulfate-reducing representatives of reductive sulfur cycle from soda lake sediments. Strain AHT 1 was isolated with thiosulfate as the electron acceptor from...

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Vydané v:	Extremophiles : life under extreme conditions Ročník 12; číslo 3; s. 431 - 439
Hlavní autori:	Sorokin, D. Yu, Tourova, T. P, Mußmann, Marc, Muyzer, G
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Japan Japan : Springer Japan 01.05.2008 Springer Japan Springer Nature B.V
Predmet:	Adaptation, Physiological Ammonia - metabolism Bacteria Bacteria - classification Bacteria - genetics Bacteria - growth & development Bacteria - isolation & purification Bacteria - metabolism Biochemistry Biomedical and Life Sciences Biotechnology Chemoautotrophic Growth Clostridiales Cytochromes - metabolism Deltaproteobacteria - classification Deltaproteobacteria - genetics Deltaproteobacteria - growth & development Deltaproteobacteria - isolation & purification Deltaproteobacteria - metabolism DNA, Bacterial - analysis Egypt Fatty Acids - metabolism Fresh Water - chemistry Fresh Water - microbiology Hydrogen-Ion Concentration Kenya Lake sediments Lakes Life Sciences Microbial Ecology Microbiology Molecular Sequence Data Nitrates - metabolism Original Paper Oxidation-Reduction Phenotype Phylogeny RNA, Bacterial RNA, Ribosomal, 16S Salinity Sediments Sulfate reduction Sulfides - metabolism Sulfur Sulfur cycle Thiosulfates - metabolism Time Factors Kenya Egypt Egypt, Arab Rep Thiosulfate-reducing Polysulfide Haloalkaliphilic Soda lakes Sulfur-reducing
ISSN:	1431-0651, 1433-4909
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Shrnutí:	Anaerobic enrichments with H₂ as electron donor and thiosulfate/polysulfide as electron acceptor at pH 10 and 0.6 M total Na⁺ yielded two non sulfate-reducing representatives of reductive sulfur cycle from soda lake sediments. Strain AHT 1 was isolated with thiosulfate as the electron acceptor from north-eastern Mongolian soda lakes and strain AHT 2--with polysulfide as the electron acceptor from Wadi al Natrun lakes in Egypt. Both isolates represented new phylogenetic lineages: AHT 1--within Clostridiales and AHT 2--within the Deltaproteobacteria. Both bacteria are obligate anaerobes with respiratory metabolism. Both grew chemolithoautotrophically with H₂ as the electron donor and can use thiosulfate, elemental sulfur and polysulfide as the electron acceptors. AHT 2 also used nitrate as acceptor, reducing it to ammonia. During thiosulfate reduction, AHT 1 excreted sulfite. dsrAB gene was not found in either strain. Both strains were moderate salt-tolerant (grow up to 2 M total Na⁺) true alkaliphiles (grow between pH 8.5 and 10.3). On the basis of the phenotypic and phylogenetic data, strains AHT 1 and AHT 2 are proposed as new genera and species Dethiobacter alkaliphilus and Desulfurivibrio alkaliphilus, respectively.
Bibliografia:	http://dx.doi.org/10.1007/s00792-008-0148-8 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	1431-0651 1433-4909
DOI:	10.1007/s00792-008-0148-8