1887

Abstract

gen. nov., sp. nov. is a moderately halophilic, exopolysaccharide-producing, Gram-negative rod isolated from a hypersaline habitat in Murcia in south-eastern Spain. The bacterium is chemoheterotrophic and strictly aerobic (i.e. unable to grow under anaerobic conditions either by fermentation or by nitrate or fumarate respiration). It does not synthesize bacteriochlorophyll . Catalase and phosphatase are positive. It does not produce acids from carbohydrates. It cannot grow with carbohydrates or amino acids as sole sources of carbon and energy. It grows best at 9–10 % w/v NaCl and requires the presence of Na but not Mg or K, although they do stimulate its growth somewhat when present. Its major fatty-acid component is 18 : 17 (78·0 %). The predominant respiratory lipoquinone found in strain A3 is ubiquinone with ten isoprene units. The G+C content is 64·5 mol%. Phylogenetic analyses strongly indicate that this strain forms a distinct line within a clade containing the genus in the subclass -. The similarity value with and is 94 %. In the light of the polyphasic evidence gathered in this study it is proposed that the isolate be classified as representing a new genus and species, gen. nov., sp. nov. The proposed type strain is strain A3 (=CECT 5855=LMG 22090=DSM 16094).

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2004-09-01
2019-08-20
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