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Published online ahead of print on 19 June 2009 as doi:ijs.0.007518-0
International Journal of Systematic and Evolutionary Microbiology 2009;59:1691.

Int J Syst Evol Microbiol (2009); DOI 10.1099/ijs.0.007518-0
© 2009 International Union of Microbiological Societies
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Marinobacter lacisalsi sp. nov. a moderately halophilic bacterium isolated from the saline-wetland wildfowl reserve 'Fuente de Piedra' in Southern Spain

Margarita Aguilera1, María Luján Jiménez-Pranteda1, Karima Kharroub1, Ana González-Paredes1, Juán Jóse Durban1, Nick J. Russell2, Alberto Ramos-Cormenzana1 and Mercedes Monteoliva-Sánchez1,3

1 University of Granada;
2 Imperial College at Wye

3 E-mail: mmonteol{at}ugr.es

A Gram negative, non-spore-forming, motile, moderately halophilic aerobic rod-shaped bacterium was isolated from the inland hypersaline lake 'Fuente de Piedra', a saline-wetland wildfowl reserve located in the province of Málaga in Southern Spain. The strain designated FP2.5 T was subjected to a polyphasic taxonomic study. This organism produced colonies with a light-yellow pigment. Strain FP2.5T grew at salinities of 3-15% (w/v) and at temperatures of 20-40 °C. The pH range for growth was 5-9. The strain FP2.5T was able to utilize various organic acids sole carbon and energy sources. Its major fatty acids were C16:0, C18:1{omega}9c and C16:1{omega}9c. The DNA G+C content was 58.6 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain FP2.5T appeared to be a member of the genus Marinobacter and clustered closely with Marinobacter segnicrescens, Marinobacter bryozoorum and Marinobacter gudaonensis with 98.1%, 97.4% and 97.2% similarity, respectively. However, DNA-DNA relatedness between the new isolates and the closest related Marinobacter species was low, with levels of relatedness between strain FP2.5T and Marinobacter segnicrescens LMG 23928T, Marinobacter bryozoorum DSM 15401T and Marinobacter gudaonensis DSM 18066T of 36.3%, 32.1% and 24.9% respectively. On the basis of phenotypic characteristics, phylogenetic analysis and DNA-DNA relatedness data, it is proposed that strain FP2.5T represents a novel species of the genus Marinobacter, with the name Marinobacter lacisalsi sp. nov. The type strain is FP2.5T (= CECT 7297T = LMG 24237T)






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