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Halomonas anticariensis sp. nov., from Fuente de Piedra, a saline-wetland wildfowl reserve in Málaga, southern Spain

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

Correspondence
Emilia Quesada
equesada{at}ugr.es

Three Halomonas strains, FP34, FP35^T and FP36, which were isolated from soil samples taken from Fuente de Piedra, a saline wetland in the province of Málaga in southern Spain, are described. Phylogenetic analyses based on 16S rRNA gene sequences show that the three isolates belong to the genus Halomonas in the -Proteobacteria and form an independent genetic line. Phenotypically, they share the characteristics of Halomonas and differ from the most closely related species, Halomonas campisalis, in the following features: they are strictly aerobic and, because of their production of exopolysaccharides, form cream-coloured, mucoid colonies; they produce phosphatase and grow within narrow pH and temperature ranges; and they are susceptible to kanamycin and streptomycin. Their G+C content varies between 60·0 and 61·4 mol%. The name Halomonas anticariensis sp. nov. is proposed for these isolates. Strain FP35^T (=LMG 22089^T=CECT 5854^T) is the type strain. The bacterium grows best in 7·5 % (w/v) NaCl and does not require magnesium or potassium salts for growth, although they do stimulate growth somewhat when present. Its major fatty acids are 18 : 17c, 16 : 0, 16 : 17c, 15 : 0 iso 2-OH, 12 : 0 3-OH, 12 : 0, 10 : 0 and 19 : 0 cyclo 8c. Its predominant respiratory lipoquinone is ubiquinone with nine isoprene units (Q-9).

Published online ahead of print on 9 February 2004 as DOI 10.1099/ijs.0.63108-0.

The GenBank/EMBL/DDBJ accession numbers for the 16S rDNA sequences of strains FP35^T, FP34 and FP36 are AY489405, AY489406 and AY489407, respectively.

Supplementary tables giving phenotypic characteristics and figures showing a dendrogram, a phylogenetic tree including Halomonas species and other Gram-negative halophilic species, and a transmission electron micrograph of strain FP35^T are available as supplementary material in IJSEM Online.

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