Halomonas saliphila sp. nov., a moderately halophilic bacterium isolated from a saline soil
2018
A novel, Gram-stain-negative, aerobic, rod-shaped, motile and moderately halophilic bacterium, designated strain LCB169T, was isolated from a saline soil sample from Gansu Province, PR China. The cells of LCB169T grew at 10–52 °C (optimum 30 °C), at pH 6.0–10.0 (optimum pH 8.0) and in the presence of 0–17 % (w/v) NaCl (optimum 10–15 %). Phylogenetic analysis based on 16S rRNA gene sequences and concatenated 16S rRNA, gyrB and rpoD genes sequences revealed that LCB169T represented a member of the genus Halomonas in the class
Gammaproteobacteria
. The most closely related species were
Halomonas daqingensis
DQD2-30T (98.0 % 16S rRNA gene sequence similarity),
Halomonas kenyensis
AIR-2T (97.8 %) and
Halomonas desiderata
FB2T (97.5 %). DNA–DNA relatedness values between LCB169T and
H. daqingensis
CGMCC 1.6443T,
H. desiderata
DSM 9502T and
H. kenyensis
DSM 17331T were 33, 35 and 38 %, respectively. The polar lipids were identified as diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine and three unidentified phospholipids. The major fatty acids were C18 : 1ω7c, C16 : 0, C16 : 1ω7c and C12 : 0 3-OH. The genomic DNA G+C content was 66.1 mol% and the predominant respiratory quinone was Q-9. On the basis of the results of phenotypic, phylogenetic and chemotaxonomic analyses and DNA–DNA hybridization relatedness values, LCB169T is considered to represent a novel species of the genus Halomonas, for which the name
Halomonas saliphila sp. nov. is proposed. The type strain is LCB169T (=CGMCC 1.15818T=KCTC 52618T).
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