Paracoccus saliphilus sp nov., a halophilic bacterium isolated from a saline soil

A Gram-negative, coccoid to short rod-shaped, non-spore-forming, moderately halophilic bacterium, designated strain YIM 90738(T), was isolated from a salt lake in Xinjiang province, northwest China, and was subjected to a polyphasic taxonomic study. The strain was non-motile and grew at pH 6.0-8.0 (optimal growth at pH 7.0), 10-55 degrees C (optimal growth at 37 degrees C) and salinities of 1-15 % NaCl (w/v, optimal growth at 8 % NaCl). Ubiquinone 10 was detected as the major respiratory quinone. The cellular fatty acid profile had C-18: (1)omega 7c (80.4 % of the total) as the major component, similar to those of members of the genus Paracoccus. The nearest phylogenetic neighbour of strain YIM 90738(T) was the type strain of Paracoccus homiensis, as determined by 16S rRNA gene sequence analysis (97.5 % similarity). The level of DNA-DNA relatedness between P. homiensis DSM 17862(T) and strain YIM 90738(T) was 51.5 %. The G + C content of the genomic DNA of strain YIM 90738(T) was 60.3 mol%. On the basis of phenotypic and phylogenetic data and its genotypic distinctiveness, strain YIM 90738(T) (=CCTCC AB 206074(T) =KCTC 22163(T)) is proposed as the type strain of a novel species of the genus Paracoccus, Paracoccus saliphilus sp. nov.