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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Desulfovibrio marinus sp. nov., a moderately halophilic sulfate-reducing bacterium isolated from marine sediments in Tunisia
International Journal of Systematic and Evolutionary Microbiology, Volume 57, No. 9, Year 2007
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Description
Two novel sulfate-reducing bacterial strains, designated E-2T and IMP-2, were isolated from geographically distinct locations. Strain E-2T was recovered from marine sediments near Sfax (Tunisia), whereas strain IMP-2 originated from oilfield production fluids in the Gulf of Mexico. Cells were Gram-negative, non-sporulated, motile, vibrio-shaped or sigmoid. They were strictly anaerobic, mesophilic and moderately halophilic. Sulfate, sulfite, thiosulfate and elemental sulfur served as electron acceptors, but not nitrate or nitrite. H2 (with acetate as carbon source), formate, fumarate, lactate, malate, pyruvate, succinate and fructose were used as electron donors in the presence of sulfate as terminal electron acceptor. Lactate was oxidized incompletely to acetate. Fumarate and pyruvate were fermented. Desulfoviridin and c-type cytochromes were present. 16S rRNA gene sequence analysis of the two strains showed that they were phylogenetically similar (99.0% similarity) and belonged to the genus Desulfovibrio, with Desulfovibrio indonesiensis and Desultovibrio gabonensis as their closest phylogenetic relatives. The G + C content of the DNA was respectively 60.4 and 62.7 mol% for strains E-2T and IMP-2. DNA-DNA hybridization experiments revealed that the novel strains had a high genomic relatedness, suggesting that they belong to the same species. We therefore propose that the two isolates be affiliated to a novel species of the genus Desulfovibrio, Desulfovibrio marinus sp. nov. The type strain is strain E-2T (=DSM 18311T =JCM 14040T). © 2007 IUMS.
Authors & Co-Authors
Thabet, Olfa Ben Dhia
France, Marseille
Aix Marseille Université
Tunisia, Tunis
University of Carthage, Institut National Des Sciences Appliquées et de Technologie
Fardeau, Marie Laure
France, Marseille
Aix Marseille Université
Suarez-Nuñez, C.
France, Marseille
Aix Marseille Université
Mexico, Mexico City
Instituto Mexicano Del Petroleo
Hamdi, Moktar
Tunisia, Tunis
University of Carthage, Institut National Des Sciences Appliquées et de Technologie
Thomas, Pierre
France, Marseille
Aix Marseille Université
Ollivier, Bernard M.
France, Marseille
Aix Marseille Université
Alazard, Didier
France, Marseille
Aix Marseille Université
Mexico, Mexico City
Instituto Mexicano Del Petroleo
Statistics
Citations: 24
Authors: 7
Affiliations: 3
Identifiers
Doi:
10.1099/ijs.0.64790-0
ISSN:
14665026
Research Areas
Environmental
Genetics And Genomics
Study Locations
Tunisia