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Int J Syst Evol Microbiol 54 (2004), 733-737; DOI  10.1099/ijs.0.02942-0
© 2004 International Union of Microbiological Societies

Halomonas ventosae sp. nov., a moderately halophilic, denitrifying, exopolysaccharide-producing bacterium

M. José Martínez-Cánovas, Emilia Quesada, Inmaculada Llamas and Victoria Béjar

Microbial Exopolysaccharide Research Group, Department of Microbiology, Faculty of Pharmacy, Campus Universitario de Cartuja, University of Granada, 18071 Granada, Spain

Correspondence
Victoria Béjar
vbejar{at}ugr.es

Halomonas ventosae sp, nov. includes three moderately halophilic, exopolysaccharide-producing strains isolated from saline soils in Jaén (south-eastern Spain). These strains can grow anaerobically using either nitrate or nitrite as terminal electron acceptor and hydrolyse both tyrosine and phenylalanine. Their G+C content varies between 72·6 and 74·3 mol%. The affiliation of the isolates with the genus Halomonas was confirmed by 16S rRNA gene sequence comparison. DNA–DNA hybridization shows 70·4–82·7 % relatedness among the three strains. Nevertheless, their relatedness is less than 43 % compared to related reference strains. The proposed type strain for Halomonas ventosae is strain Al12T (=CECT 5797T=DSM 15911T). It grows best at 8 % (w/v) sea salts and requires the presence of Na+. Its major fatty acids are 18 : 1 {omega}7c, 16 : 0, 16 : 1 {omega}7c, and 15 : 0 iso 2-OH. The predominant respiratory lipoquinone found in strain Al12T is ubiquinone with nine isoprene units (Q-9).


Abbreviations: EPS, extracellular polysaccharide

The GenBankEMBL/DDBJ accession number for the 16S rDNA sequence of strain Al12T is A4268080.

Supplementary data relating to the phenotypic characteristics of Halomonas ventosae sp. nov., the results of DNA–DNA hybridization experiments, and dendrograms of phylogenetic relationships are available at IJSEM Online.




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