Sediminibacillus terrae sp. nov., a moderate halophile isolated from non-saline farm soil

Sediminibacillus dalangtanensis sp. nov., a moderate halophile isolated from hypersaline sediments of the Qaidam Basin in Northwest China

A Gram-stain-positive, moderately halophilic, aerobic, endospore-forming, rod-shaped bacterium, designated strain DP4-553-ST, was isolated from hypersaline sediment collected from the Dalangtan Playa in the Qaidam Basin, Northwest PR China. Growth occurred within 0–21.6% (w/v) NaCl (optimum 7.2%) at pH 5.5–9.0 (optimum pH 7.0) and at 4–45 °C (optimum 37 °C). Phylogeny based on 16S rRNA gene sequences indicated that strain DP4-553-ST belonged to the genus Sediminibacillus , with high 16S rRNA gene sequence similarity to Sediminibacillus halophilus EN8dT (99.5 %), Sediminibacillus terrae JSM 102062T (99.4 %), Virgibacillus senegalensis SK-1T (99.3 %) and Sediminibacillus albus NHBX5T (98.3 %). The G+C content of the chromosomal DNA was 43.6 mol %. The average amino acid identity, average nucleotide identity and digital DNA–DNA hybridization values between strain DP4-553-ST and the four close type strains were 71.2–93.3, 74.0–90.5 and 20.0–41.4 %, respectively. The whole genomic analysis showed that strain DP4-553-ST constituted a different taxon separated from the recognized Sediminibacillus species. The major cellular fatty acids were anteiso-C15 : 0, anteiso-C17 : 0, iso-C16 : 0, C16 : 0 and iso-C15 : 0. The type strain contained cell-wall peptidoglycan based on diaminopimelic acid and possessed menaquinone-7 as the major respiratory isoprenoid quinone. The polar lipid pattern consisted of diphosphatidylglycerol, phosphatidylglycerol, four unidentified glycolipids, phosphatidylcholine, aminophospholipid, aminolipid and seven unidentified phospholipids. The combined data from phenotypic and genotypic studies demonstrated that strain DP4-553-ST represents a novel species of the genus Sediminibacillus , for which the name Sediminibacillus dalangtanensis sp. nov. is proposed, the type strain is DP4-553-ST (=MCCC 1K03838T= KCTC 43250T).

Halomonas faecis sp. nov., a halophilic bacterium isolated from human faeces

A novel moderately halophilic, Gram-stain-negative, catalase- and oxidase-positive, strictly aerobic, non-sporulating, non-motile rod, designated strain JSM 104105 ^T, was isolated from human faeces. Strain JSM 104105 ^T was able to grow with 0.5-18% (w/v) NaCl (optimum 4-9%), at pH 6-10.5 (optimum pH 7-8) and at 10-40 °C (optimum 30 °C) in complex media. The major cellular fatty acids were C_18:1ω7c, C_16:0, C_16:1ω7c and/or C_16:1ω6c, C_19:0 cyclo ω8c and C_12:0 3-OH. The polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, an unidentified aminophospholipid, an unidentified glycolipid and three unidentified phospholipids. The predominant respiratory quinone was Q-9 and the genomic DNA G + C content was 64.5 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain JSM 104105 ^T should be assigned to the genus Halomonas, and was most closely related to Halomonas gudaonensis SL014B-69 ^T (99.0% sequence similarity), followed by Halomonas azerbaijanica TBZ202^T (98.6%) and Halomonas lysinitropha 3(2)^T (97.3%). The whole genomic analysis showed that strain JSM 104105 ^T constituted a different taxon separated from the recognized Halomonas species. Combined data from phenotypic and genotypic studies demonstrated that strain JSM 104105 ^T represents a new species of the genus Halomonas, for which the name Halomonas faecis sp. nov. is proposed. The type strain is JSM 104105 ^T (= CCTCC AB 2014160 ^T = CGMCC 1.12945 ^T = KCTC 42146 ^T).