Sabulibacter ruber gen. nov., sp. nov., a novel bacterium in the family Hymenobacteraceae, isolated from desert soil

Abstract

A novel Gram-stain-negative, aerobic, oxidase-positive, catalase-positive, non-motile, short rod-shaped, red-pigmented strain, designated as SYSU D00434^T, was isolated from a dry sandy soil sample collected from the Gurbantunggut desert in Xinjiang, north-west PR China. Strain SYSU D00434^T was found to grow at 4-37 °C (optimum, 28-30 °C), pH 6.0-8.0 (optimum, pH 7.0) and with 0-1.5 % (w/v) NaCl (optimum, 0-0.5 %). The predominant respiratory quinone was MK-7 and the major fatty acids (>10 %) were C_{16 : 1} ω5c, iso-C_{15 : 0}, summed feature 3 (C_{16 : 1} ω6c and/or C_{16 : 1} ω7c) and summed feature 4 (anteiso-C_{17 : 1} B and/or iso-C_{17 : 1} I). The polar lipids consisted of phosphatidylethanolamine, two unidentified polar lipids, two unidentified aminolipids, two unidentified phospholipids and two unidentified glycolipids. The genomic DNA G+C content of strain SYSU D00434^T was 50.6 mol%. Phylogenetic analyses based on 16S rRNA gene sequences indicated that strain SYSU D00434^T belonged to the family Hymenobacteraceae, and shared a sequence similarity of less than 94.6 % to all validly named taxa. Based on the phenotypic, phylogenetic and chemotaxonomic properties, strain D00434^T is proposed to represent a new species of a new genus, named Sabulibacter ruber gen. nov., sp. nov., within the family Hymenobacteraceae. The type strain is SYSU D00434^T (=CGMCC 1.18624^T=KCTC 82276^T=MCCC 1K04975^T).

Keywords: Hymenobacteraceae; Sabulibacter gen. nov.; Sabulibacter ruber sp. nov.; polyphasic taxonomy.