<Emphasis Type="Italic">Salinivibrio sharmensis</Emphasis> sp. nov., a novel haloalkaliphilic bacterium from a saline lake in Ras Mohammed Park (Egypt) |
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Authors: | Ida Romano Pierangelo Orlando Agata Gambacorta Barbara Nicolaus Laura Dipasquale Javier Pascual Assunta Giordano Licia Lama |
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Institution: | 1.Istituto di Chimica Biomolecolare, CNR,Pozzuoli (Naples),Italy;2.Istituto di Biochimica delle Proteine, CNR,Naples,Italy;3.Departamento de Microbiología y Ecología, Colección Espa?ola de Cultivos Tipo (CECT),Universidad de Valencia,Valencia,Spain |
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Abstract: | A novel haloalkaliphilic, facultative anaerobic and Gram-negative Salinivibrio-like microorganism (designated strain BAGT) was recovered from a saline lake in Ras Mohammed Park (Egypt). Cells were motile, curved rods, not spore-forming and occurred
singly. Strain BAGT grew optimally at 35°C (temperature growth range 25–40°C) with 10.0% (w/v) NaCl NaCl growth range 6.0–16.0% (w/v)] and at
pH 9.0 (pH growth range 6.0–10.0). Strain BAGT had phosphatidylethanolamine (PEA) and phosphatidylglycerol (PG) as the main polar lipids, C16:0 (54.0%) and C16:1 (26.0%)
as the predominant cellular fatty acids and Q-8 as the major respiratory quinone. Phylogenetic analysis based on 16S rRNA
gene sequences indicated that strain BAGT was a member of Salinivibrio genus, with the highest sequence similarities of 99.1, 98.4 and 98.1% to Salinivibrio siamensis JCM 14472T, Salinivibrio proteolyticus DSM 19052T and Salinivibrio costicola subsp. alcaliphilus DSM 16359T, respectively. DNA–DNA hybridization values of strain BAGT with members of Salinivibrio genus were lower than 55.0%. DNA G + C content was 51.0 mol%. On the basis of the polyphasic taxonomic results revealed in
this study, strain BAGT should be classified as a novel species of Salinivibrio genus, for which the name Salinivibrio sharmensis sp. nov. is proposed, with the type strain BAGT (=ATCC BAA-1319T = DSM 18182T). |
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