Rhodosalinus sediminis gen. nov., sp. nov., isolated from marine saltern

Rhodosalinus halophilus sp. nov., isolated from a marine solar saltern, and emended description of the genus Rhodosalinus

A novel Gram-stain-negative, rod-shaped, beige-coloured, motile, facultatively anaerobic bacterium, designated as E84^T, was isolated from sediment sampled from a marine solar saltern in Wendeng, PR China. Phylogenetic analysis based on 16S rRNA gene sequencing showed that Rhodosalinus sediminis WDN1C137^T was the closest phylogenetic relationship, with 16S rRNA gene sequence similarity of 96.9 %. Optimal growth occurred at 33-37 °C (range, 20-40 °C), at pH 7.5 (pH 7.0-8.5) and with 6.0 % (w/v) NaCl (0.5-20.0 %). The sole respiratory quinone was Q-10. The major fatty acids were summed feature 8 (C_18 : 1ω7c and/or C_18 : 1ω6c), C_18 : 0 and cyclo C_19 : 0ω8c. The polar lipids were phosphatidylglycerol, one unidentified glycolipid, two unidentified phospholipids and two unidentified lipids. The genomic DNA G+C content of strain E84^T was 69.8 mol%. Based on the results of physiological, genotypic, phylogenetic and chemotaxonomic analyses, we concluded that strain E84^T represents a novel species of the genus Rhodosalinus, for which the name Rhodosalinus halophilus sp. nov. is proposed. The type strain is E84^T (=KCTC 52697^T=MCCC 1H00231^T).

Marinilabilia rubra sp. nov., isolated from a marine solar saltern

A novel cherry-red-pigmented, Gram-stain-negative, gliding, facultatively anaerobic and rod-shaped bacterium, designated strain WTE16^T, was isolated from a sediment sample taken from a marine solar saltern of Wendeng, China (36° 59' 56.49'' N 122° 1' 38.84'' E). The novel isolate was able to grow at 20-40 °C (optimum 33 °C), at pH 6.0-9.0 (optimum pH 7.0) and with 1.0-12.0 % (w/v) NaCl (optimum 3.0-5.0 %). Phylogenetic analysis based on 16S rRNA gene sequences indicated that the most closely related validly published species is Marinilabilia salmonicolor JCM 21150^T (96.0 % similarity). Average nucleotide identity, average amino acid identity, percentage of conserved proteins and digital DNA-DNA hybridization values between strain WTE16^T and Marinilabilia salmonicolor JCM 21150^T were 73.8 %, 73.5 %, 63.4 % and 19.5-24.2 %, respectively. The genomic DNA G+C content of strain WTE16^T was 40.8 mol%. Chemotaxonomic analysis showed that the sole respiratory quinone was menaquinone 7 (MK-7), and the major fatty acids included iso-C15 : 0 and anteiso-C15 : 0. The polar lipid profile of strain WTE16^T included phosphatidylethanolamine, three unidentified phospholipids and three unidentified lipids. On the basis of its phylogenetic, phenotypic, chemotaxonomic, genotypic and genomic characteristics, strain WTE16^T is suggested to represent a novel species of the genus Marinilabilia, for which the name Marinilabilia rubra sp. nov. is proposed. The type strain is WTE16^T (=KCTC 62599^T=MCCC 1H00311^T).