Rufibacter roseus sp nov., isolated from radiation-polluted soil

A rose, Gram-stain-negative, aerobic, rod-shaped bacterium that was motile by gliding, and designated strain H359(T), was isolated from radiation-polluted soil (with high Cs-137) from the Xinjiang Uygur Autonomous Region of PR China and subjected to a polyphasic taxonomic analysis. The isolate grew optimally at 30 degrees C and pH 7.0. It grew with NaCl up to 4% (w/v). 16S rRNA gene sequence analysis indicated that strain H359(T) belonged to the genus Rufibacter, a member of the family Cytophagaceae, with Rufibacter tibetensis CCTCC AB 208084(T) as its closest phylogenetic relative, having 96.1 % 16S rRNA gene sequence similarity to the type strain. Strain H359(T) contained menaquinone-7 (MK-7) as the predominant menaquinone, and the major fatty acids were iso-C-15:0, summed feature 4 (iso-C-17:1 I and/or anteiso-C-17:1 B), summed feature 3 (C-16:1 omega 7c and/or C-16:1 omega 6c and Ci(6:1)omega 5c. The polar lipid profile had phosphatidylethanolamine as the major component. The DNA G+C content was 43.9 mol%. Based on phenotypic, genotypic and phylogenetic evidence, strain H359(T) represents a novel species of the genus Rufibacter, for which the name Rufibacter roseus sp. nov. is proposed. The type strain is H359(T) (=CPCC 100615(T)=KCTC 42217(T)).