Bacillus marinisedimentorum sp. nov., isolated from marine sediment

Litoribacterium kuwaitense gen. nov., sp. nov., isolated from a Kuwait tidal flat

A Gram-stain-positive, strictly aerobic, spore-forming, rod-shaped and non-motile bacterium designated strain SIJ1^T was obtained from tidal flat sediment collected from the northern shore of Kuwait Bay, northwest of the Arabian Gulf. Strain SIJ1^T grew optimally at 30 °C and pH 7–8 in the presence of 6 % (w/v) NaCl. The cell-wall peptidoglycan was based on meso-diaminopimelic acid and an unsaturated menaquinone with seven isoprene units (MK-7) was the predominant respiratory quinone. It contained anteiso-C_15 : 0, iso-C_16 : 0 and iso-C_15 : 0 as the major fatty acids and ribose as the major whole-cell sugar. The polar lipids were diphosphatidylglycerol, phosphatidylglycerol, unidentified phospholipid, an unidentified glycolipid, phosphoglycolipid and an unidentified lipid. Phylogenetic analysis based on 16S rRNA genes revealed that SIJ1^T showed a distinct evolutionary lineage within the Firmicutes. The DNA G+C content was 43.1 mol% and the full genome analysis for strain SIJ1^T showed that it had a genome size of 3 989 945 bp and contained 4085 predicted protein-encoding genes. The SIJ1^T annotated genome showed more stress resistance encoding genes in comparison to its closely related strains. The amino acid identity and average nucleotide identity data for the whole genome proved that strain SIJ1^T does indeed represent a novel genus. The strain was distinguishable from the phylogenetically related genera through differences in several phenotypic properties. On the basis of the phenotypic, phylogenetic and genetic data, strain SIJ1^T represents a novel genus and species in the family Bacillaceae, for which the name Litoribacterium kuwaitense gen. nov., sp. nov. is proposed. The type strain is SIJ1^T (=DSM 28862^T=LMG 28316^T).

Bacillus salinus sp. nov., isolated from commercial solar salt

Two strains of Gram-stain-positive, strictly aerobic, motile, spore-forming, rod-shaped, moderately halotolerant bacteria, designated as HMF5848^T and HME7618, were isolated from salt/brine and subjected to a polyphasic taxonomic investigation. Growth of both yellow-coloured strains occurred in the presence of 1-9 % NaCl (w/v; optimum, 2-3 %), at 15-45 °C (optimum, 37 °C) and pH 6-9 (optimum, pH 7). The major fatty acids were iso-C_15 : 0, iso-C_16 : 0 and anteiso-C_15 : 0. The cell-wall peptidoglycan was meso-diaminopimelic acid. The only respiratory quinone was menaquinone-7. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, four unidentified glycolipids, three unidentified phospholipids and two unidentified polar lipids. DNA G+C content was 37.4 mol%. Phylogenetic trees based on 16S rRNA gene sequences showed that strains HMF5848^T and HME7618 clustered with Bacillus luteolus YIM 93174^T. Strains HMF5848^T showed the highest 16S rRNA gene sequence similarities to Bacillus humi LMG 22167^T (96.1 %), Bacillus isabeliae CVS-8^T (96.0 %) and Bacillus luteolus YIM 93174^T (96.0 %). The values of in silico DNA-DNA hybridization and average nucleotide identity between strains HMF5848^T and B. humi DSM 16318^T were 25.8 and 69.7 %, respectively. On the basis of phylogenetic, physiological and chemotaxonomic properties, strain HMF5848^T represents a novel species, Bacillus salinus sp. nov. The type strain is HMF5848^T (=KCTC 43010^T=CECT 9695^T).