Lysobacter antarcticus sp. nov., an SUF-system-containing bacterium from Antarctic coastal sediment

A Gram-stain-negative, heterotrophic, aerobic, non-motile, rod-shaped bacterial strain (GW1-59(T)) belonging to the genus Lysobacter was isolated from coastal sediment collected from the Chinese Great Wall Station, Antarctica. The strain was identified using a polyphasic taxonomic approach. The strain grew well on Reasoner's 2A media and could grow in the presence of 0-4% (w/v) NaCl (optimum, 1%), at pH 9.0-11.0 and at 15-37 degrees C (optimum, 30 degrees C). Strain GW1-59(T)( )possessed ubiquinone-8 as the sole respiratory quinone. The major phospholipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The major fatty acids were summed feature 9 (10-methyl(16:0) and/or iso-C-17(:1) omega 9c). and iso-C-15:(0), iso-C-16:(0), iso-C-17:(0), C-16:0, iso-C(11:)(0 )3-OH. DNA-DNA relatedness with Lysobacter concretionis Ko07(T), the nearest phylogenetic relative (98.5% 16S rRNA gene sequence similarity) was 23.4% (21.1-25.9%). The average nucleotide identity value between strain GW1-59(T) and L. concretionis Ko07(T) was 80.1%. The physiological and biochemical results and low level of DNA-DNA relatedness suggested the phenotypic and genotypic differentiation of strain GW1-59(T) from other Lysobacter species. On the basis of phenotypic, phylogenetic and genotypic data, a novel species. Lysobacter antarcticus sp. nov., is proposed. The type strain is GW1-59(T) (=CCTCC AB 2019390(T) =KCTC 72831(T)).

Automated summary

A new bacterial strain belonging to the genus Lysobacter was isolated from coastal sediment collected from the Chinese Great Wall Station, Antarctica. The strain was identified as a novel species, Lysobacter antarcticus, based on its distinctive phenotypic and genotypic characteristics.