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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Veröffentlicht in:Extremophiles : life under extreme conditions Jg. 12; H. 3; S. 431 - 439
Hauptverfasser: Sorokin, D. Yu, Tourova, T. P, Mußmann, Marc, Muyzer, G
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Japan Japan : Springer Japan 01.05.2008
Springer Japan
Springer Nature B.V
Schlagworte:
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
Online-Zugang:Volltext
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Zusammenfassung: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.
Bibliographie:http://dx.doi.org/10.1007/s00792-008-0148-8
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ISSN:1431-0651
1433-4909
DOI:10.1007/s00792-008-0148-8