Roseomonas radiodurans sp nov., a gamma-radiation-resistant bacterium isolated from gamma ray-irradiated soil

A bacterial strain, designated 1 7Sr1 -1(T), was isolated from gamma ray-irradiated soil Cells of this strain were Gram-stain-negative, strictly aerobic, motile and non-spore-forming rods Growth occurred at 18-42 degrees C and pH 6. 0-8 0, but no growth occurred at 2 % NaCl concentration The major fatty acids of strain 1 7Sr1-1(T) were summed feature 8 (C-18: 1w7c and/or C-18: 1 w6c), ISO-C(17:1)w5c and C-16: 0. The polar lipid profile contained diphosphatidylglycerol, glycolipid, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol and four unidentified lipids. The G+C content of the genomic DNA of 17Sr1-1(T) was 71.9 mol%. The 16S rRNA gene sequence analysis showed that strain 17Sr1-1(T) was phylogenetically related to Roseomonas pecuniae N75(T) and Roseomonas rosea 173-96(T) (96.6 and 96.3% sequence similarity, respectively). The genotypic and phenotypic data showed that strain 17Sr1-1(T) could be distinguished from its phylogenetically related species, and that this strain represented a novel species within the genus Roseomonas, for which the name Roseomonas radiodurans sp. nov. (type strain 17Sr1-1(T)=KCTC 52899(T)=NBRC 112872(T)) is proposed as the first reported gamma ray-resistant Roseomonas species.