nov., a novel actinobacterium isolated from a saline lake sediment

An actinobacterium, designated strain EGI L100131^T, was isolated from saline lake sediment in Xinjiang Province, China. The taxonomic position of the isolate was determined using analysis based on the polyphasic taxonomy and phylogenomics. Phylogenetic analysis and 16S rRNA gene sequence similarities indicated that strain EGI L100131^T formed a distinct clade with Ornithinimicrobium murale DSM 22056^T and Ornithinimicrobium cavernae CFH 30183^T, and shared sequence identities of 97.8% and 97.0%, respectively. The novel isolate could be distinguished from other species of the genus Ornithinimicrobium by its distinct phenotypic, physiological, and genotypic characteristics. Cells of strain EGI L100131^T were aerobic, Gram-staining positive, and coccoid to rod-shaped. Optimal growing conditions of strain EGI L100131^T occurred at pH 8.0 and 28 ºC. Ornithine was the diagnostic diamino acid in the cell-wall peptidoglycan. The respiratory quinone was MK-8 (H₄), while the major fatty acids (> 10%) were C_17:1 ω8c, C_17:0, iso-C_16:0, and iso-C_15:0. The detected polar lipids included diphosphatidylglycerol, phosphatidylinositol, phosphatidylglycerol, and a glycophospholipid. The G + C content based on genomic DNA was 71.5%. According to the phenotypic, physiological, genotypic, and phylogenetic data, strain EGI L100131^T represents a new species of the genus Ornithinimicrobium, for which the name Ornithinimicrobium sediminis sp. nov. is proposed. The type strain is EGI L100131^T (= KCTC 49716 ^T = CGMCC 1.19241^T).

nov., isolated from the faeces of the endangered and near-threatened birds

Phenotypic and genomic analyses were performed to characterize two novel species, H23M54^T and AMA3305^T, isolated from the faeces of the Oriental stork (Ciconia boyciana) and the cinereous vulture (Aegypius monachus), respectively. Strains H23M54^T and AMA3305^T showed the highest similarities of 16S rRNA gene sequences and complete genome sequences with Ornithinimicrobium cavernae CFH 30183^T (98.5% of 16S rRNA gene sequence similarity and 82.1% of average nucleotide identity, ANI) and O. pekingense DSM 21552^T (98.5% of 16S rRNA gene sequence similarity and 82.3% of ANI), respectively. Both strains were Gram-stain-positive, obligate aerobes, non-motile, non-spore-forming, and coccoid- and rodshaped. Strain H23M54^T grew optimally at 25-30°C and pH 8.0 and in the presence of 1.5-2% (wt/vol) NaCl, while strain AMA3305^T grew optimally at 30°C and pH 7.0 and in the presence of 1-3% (wt/vol) NaCl. Both strains had iso-C_15:0, iso-C_16:0, and summed feature 9 (iso-C_17:1ω9c and/or C_16:0 10-methyl) as major cellular fatty acids. MK-8 (H₄) was identified as the primary respiratory quinone in both strains. Strains H23M54^T and AMA3305^T possessed diphosphatidylglycerol and phosphatidylglycerol as major polar lipids. Moreover, strains H23M54^T and AMA3305^T commonly contained ribose and glucose as major sugars and L-ornithine, L-alanine, glycine, and aspartic acid as major amino acids. The polyphasic taxonomic data indicate that strains H23M54^T and AMA3305^T represent novel species of the genus Ornithinimicrobium. We propose the names Ornithinimicrobium ciconiae sp. nov. and Ornithinimicrobium avium sp. nov. for strains H23M54^T (= KCTC 49151^T = JCM 33221^T) and AMA3305^T (= KCTC 49180^T = JCM 32873^T), respectively.

nov., isolated from meadow soil

A novel Gram-stain-positive, yellow, short-rod-shaped or coccoid bacterial strain, W204^T, was isolated from a soil sample collected from Jiadengyu national forest park in China and characterized using a polyphasic approach. The cell-wall peptidoglycan contained ornithine as the diagnostic diamino acid. 16S rRNA gene sequence analysis indicated that strain W204^T was closely related to Ornithinimicrobium flavum CPCC 203535^T (97.4 %, similarity), Serinicoccus profundi CGMCC 4.5582^T (96.9 %), Serinicoccus sediminis GP-T3-3^T (96.8 %), Serinicoccus hydrothermalis JLT9^T (96.7 %), Ornithinimicrobium cerasi CPCC 203383^T (96.6 %) and Ornithinimicrobium kibberense K22-20^T (96.6 %). However, the digital DNA-DNA genome hybridization value between strain W204^T and the closest related strain O. flavum CPCC 203535^T was 21.90 %. Complete genome analyses revealed that the size of the genome was 3.54 Mb and the genomic DNA G+C content was 70.79 mol%. The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylcholine, an unidentified glycolipid, an unidentified phospholipid and an unidentified lipid. The major menaquinone was MK-8(H₄). The predominant cellular fatty acids were iso-C_15 : 0, anteiso-C_15 : 0 and C_16 : 0. The phenotypic, chemotaxonomic and phylogenetic data suggested that strain W204^T should be classified as representative of a novel species of the genus Ornithinimicrobium, for which the name Ornithinimicrobium pratense sp. nov. is proposed. The type strain is W204^T (=GDMCC 1.1391^T=KCTC 49237^T).

nov., isolated from the fruit of Cerasus pseudocerasus and emended description of the genus Ornithinimicrobium

Strain CPCC 203383^T, isolated from the surface-sterilized fruit of Cerasus pseudocerasus (Lindl.) G. Don, was taxonomically characterized based on a polyphasic investigation. It had the highest 16S rRNA gene sequence similarities with Ornithinimicrobium pekingense DSM 21552 (97.2 %) and O. kibberense DSM 17687^T (97.2%). Phylogenetic analysis based on 16S rRNA gene sequences showed that the strain formed a distinct phyletic branch within the genus Ornithinimicrobium and the whole genome sequence data analyses supported that strain CPCC 203383^T was phylogenetically related to the Ornithinimicrobium species. The isolate shared a range of phenotypic patterns reported for members of the genus Ornithinimicrobium, but also had a range of cultural, physiological and biochemical characteristics that separated it from related Ornithinimicrobium species. The menaquinone was MK-8(H₄). The polar lipid profile consisted of diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylinositol (PI) and unidentified lipids (ULs). The major fatty acids (>5 %) were iso-C_15 : 0, anteiso-C_15 : 0, iso-C_16:0, 9-methyl C_16 : 0, iso-C_17 : 0 and anteiso-C_17 : 0. The cell wall peptidoglycan contains l-ornithine as diagnostic diamino acid and an interpeptide bridge consisting of _L-Orn←_L-Ala←Gly←_D-Asp. The combined genotypic and phenotypic data indicated that the isolate represents a novel species of the genus Ornithinimicrobium, for which the name Ornithinimicrobium cerasi sp. nov. is proposed, with CPCC 203383^T(=NBRC 113522^T=KCTC 49200^T) as the type strain. The DNA G+C composition is 72.3 mol%. The availability of new data allows for an emended description of the genus Ornithinimicrobium.