Halomonas salipaludis sp. nov., isolated from a saline-alkali wetland soil.

ABSTRACT

Strain WRN001T, a Gram-staining-negative, strictly aerobic, non-motile bacterium was isolated from the natural saline-alkali wetland soil of Binhai new district, Tianjin, China (38°46' N, 117°13' E). Cells of strain WRN001T were 0.3-0.5 µm in width and 1.5-2.5 µm in length, and the growth occurred optimally at 33-37 °C, pH 7.5-8.0, and in the presence of 8-10% (w/v) NaCl. Based on 16S rRNA gene sequence analysis, the isolate could be affiliated to the genus Halomonas, and the highest 16S rRNA gene sequence similarity of strain WRN001T to its closest relative Halomonas qiaohouensis DSM 26770 T was 97.5%. The size of the genome as presented here was 5,475,884 bp with a G + C content of 63.8 mol %. The major respiratory quinone of strainWRN001T was Q-9, and the dominant fatty acids were summed feature 8, summed feature 3, C100, C120, C120 3-OH, C160, and C170 cyclo. The major polar lipids were diphosphatidylglycerol (DPG), phosphatidylethanolamine (PE), phosphatidylglycerol (PG), phophatidylcholine (PC), two phospholipids (PL), aminolipid (AL), and three unidentified lipids (L). These data combined with the low digital DDH values between strain WRN001T and the close relative, Halomonas alkalitolerans CGMCC 1.9129 T (42.2%) and based on comparisons with currently available genomes, the highest average nucleotide identity (ANIm) value was 91.4% to Halomonas alkalitolerans CGMCC 1.9129 T (GenBank accession No. GCA_001971685.1). Therefore, we propose a novel species in the genus Halomonas to accommodate this novel isolate Halomonas salipaludis sp. nov. (type strain WRN001T = KCTC 52853 T = ACCC 19974 T).