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Halorubrum salipaludis sp. nov., isolated from the saline–alkaline soil

A novel extremely halophilic archaeon, designated WN019 T , was isolated from the natural saline-alkali wetland soil of Binhai new district, Tianjin, China. Cells of WN019 T were aerobic, motile, and pleomorphic rod-shaped, 0.5–0.8 µm in width and 2.0–2.5 µm in length, and the growth occurred optimally at 33–37 °C, pH 7.5–8.0, and in the presence of 15.0–20.0% (w/v) NaCl. Phylogenetic analyses based on 16S rRNA gene sequence comparison showed that the isolate belonged to the genus Halorubrum and exhibited moderate sequence similarity of 97.8% to Halorubrum saccharovorum JCM 8865 T . The major respiratory quinones of strain WN019 T were MK-8 and MK-8 (H 2 ), and the major polar lipids were glycolipid (GL), phospholipid (PL), phosphatidylglycerol-sulphate (PGS), phosphatidylglycerol (PG) and phosphatidylglycerol-phosphate-methyl ester (Me-PGP). The DNA G + C content of the strain was 67.4 mol%. The average nucleotide identity (ANI) and digital DNA–DNA hybridization (dDDH) value based on whole genome sequences of strain WN019 T and Halorubrum saccharovorum JCM 8865 T were 87.5% and 35.4%, respectively. Phenotypic, chemotaxonomic, phylogenetic, and genomic analyses suggested that strain WN019 T represents a novel species of the genus Halorubrum , for which the name Halorubrum salipaludis sp. nov. is proposed. The type strain is WN019 T (= KCTC 4269 T  = ACCC 19977 T ).