TL;DR: Three moderately halophilic, spore-forming strains were isolated from a solar saltern in Korea and revealed that they represent a novel distinct monophyletic lineage within the phyletic group classically defined as the genus Bacillus and are most closely related to members of the genera Gracilibacillus and Halobacillus.
Abstract: Three moderately halophilic, spore-forming strains, designated BH030062T, BH030049 and BH030080, were isolated from a solar saltern in Korea. Phylogenetic analyses and comparative 16S rRNA gene sequence studies revealed that the isolates represent a novel distinct monophyletic lineage within the phyletic group classically defined as the genus Bacillus and are most closely related to members of the genera Gracilibacillus (93·7–95·1 % similarity), Virgibacillus (93·5–94·8 %), Halobacillus (94·8–95·9 %), Filobacillus (94·4–94·8 %) and Lentibacillus (93·3–93·7 %). Strain BH030062T was strictly aerobic, rod-shaped, Gram-positive and motile by means of peritrichous flagella. It grew in the presence of 1–15 % (w/v) NaCl and at temperatures of 15–45 °C. The cell wall peptidoglycan contained A1γ-meso-diaminopimelic acid as the diagnostic diamino acid. The predominant cellular fatty acids were iso-C15 : 0, anteiso-C15 : 0 and iso-C16 : 0. DNA G+C content was about 41 mol% and the major isoprenoid quinone was MK-7. On the basis of their physiological and molecular properties, the isolates represent a new genus, Pontibacillus gen. nov., and novel species, Pontibacillus chungwhensis sp. nov. The type strain is BH030062T (=KCTC 3890T=DSM 16287T).
TL;DR: This chapter reviews the aerobic, endospore-forming moderately halophilic and haloalkaliphilic bacteria that have been reported to be isolated from saline soils or sediment samples.
Abstract: This chapter reviews the aerobic, endospore-forming moderately halophilic and haloalkaliphilic (and some halotolerant) bacteria that have been reported to be isolated from saline soils or sediment samples. These species belong to the family Bacillaceae, within the phylum Firmicutes, and are included in the following genera: Alkalibacillus, Bacillus, Filobacillus, Gracilibacillus, Halalkalibacillus, Halobacillus, Lentibacillus, Ornithinibacillus, Paraliobacillus, Salirhabdus, Salsuginibacillus, Tenuibacillus, Terribacillus, Thalassobacillus and Virgibacillus. Besides their taxonomic features, their ecological roles and biotechnological potential are reviewed.
TL;DR: Microorganisms from the genus Streptomonospora, which are Gram-positive, aerobic organisms with branching hyphae, are found to grow upto 15% NaCl.
Abstract: Halophiles microbes are present in hypersaline environments. Several alkaliphilic Bacillus species isolated from soils show halophilic characteristics. Genera that include halophilic species isolated from soil samples are Halobacillus, Filobacillus, Tenuibacillus, Lentibacillus, and Thalassobacillus. Species from Filobacillus, Thalassobacillus, Lentibacillus and Tenuibacillus genera are moderately halophile. The family Nocardiopsaceae predominate in saline or alkaline soils. Many Gram-negative, moderately halophilic, or halotolerant species are included in the family Halomonadaceae. Microorganisms from the genus Streptomonospora, which are Gram-positive, aerobic organisms with branching hyphae, are found to grow upto 15% NaCl.
TL;DR: A maximum-parsimony phylogenetic tree based on 16S rRNA gene sequences shows that strain SH4sT represents a novel genus and species in the family Bacillaceae, for which the name Aquisalibacillus elongatus gen. nov., sp.
Abstract: A novel moderately halophilic, non-motile, rod-shaped bacterium was isolated from a saline lake, Lake Shangmatala, in the Inner Mongolia Autonomous Region, China. This bacterium, designated SH4sT, was strictly aerobic, catalase-positive and oxidase-negative. It grew at salinities of 3-20 % (w/v) NaCl, with an optimum at 10 % (w/v) NaCl. The cell-wall peptidoglycan was of the A4beta type, based on l-Orn-d-Asp, and the major quinone was a menaquinone with seven isoprene units (MK-7). The major fatty acids were iso-C16:0 and iso-C15:0. The polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, a glycolipid and four different unidentified phospholipids. The DNA G+C content was 45.9 mol%. In a maximum-parsimony phylogenetic tree based on 16S rRNA gene sequences, strain SH4sT was found to belong to the family Bacillaceae and to be most closely related to members of the genera Filobacillus (95.9 % sequence similarity), Piscibacillus (95.7 %) and Tenuibacillus (95.4 %). DNA-DNA hybridization experiments revealed 10 % relatedness (12 %, reciprocally) between strain SH4sT and Filobacillus milosensis DSM 13259T, the sole species of the genus. All of these data show that strain SH4sT represents a novel genus and species in the family Bacillaceae, for which the name Aquisalibacillus elongatus gen. nov., sp. nov. is proposed. The type strain of Aquisalibacillus elongatus is SH4sT (=CCM 7366T =CECT 7149T =DSM 18090T).