Pseudooceanicola aestuarii sp. nov., isolated from the Jiulong River Estuary in PR China

Pseudemcibacter aquimaris gen. nov., sp. nov., isolated from an aquaculture farm

A rod-shaped, Gram-stain-negative, aerobic and non-motile bacterium, designated strain Y4T, was isolated from an aquaculture farm in Xiamen, PR China. Strain Y4T had 94.8, 93.3 and 91.8 % 16S rRNA gene sequence similarity to Paremcibacter congregatus ZYLT, Emcibacter nanhaiensis HTCJW17T and Luteithermobacter gelatinilyticus MEBiC09520T, respectively. The genomic DNA G+C content of strain Y4T was 42.7 mol%. The average amino acid identity and percentage of conserved proteins values between strain Y4T and type strains of the family Emcibacteraceae were 57.9–58.6 % and 44.5–47.6 %, respectively. Optimal growth was observed at 28 °C, at pH 7.0 and with 2 % (w/v) NaCl. The novel strain Y4T required Ca2+, K+ and Mg2+ ions in addition to NaCl for growth. The dominant fatty acids of strain Y4T were summed feature 3 (C16 : 1  ω7c/C16 : 1  ω6c), summed feature 8 (C18 : 1  ω7c/C18 : 1  ω6c) and C14 : 0 2-OH. The polar lipid profile contained phosphatidylethanolamine, phosphatidyglycerol, three unidentified aminolipids, four unidentified aminophospholipids and two unidentified lipids. Cells contained exclusively ubiquinone Q-10. On the basis of the polyphasic analysis, strain Y4T (=MCCC 1K06278T=KCTC 82926T) is considered to represent a novel species in a novel genus of the family Emcibacteraceae , for which the name Pseudemcibacter aquimaris gen. nov., sp. nov. is proposed.

Pseudooceanicola endophyticus sp. nov., a novel endophytic bacterium isolated from bark Aegiceras corniculatum

A Gram-stain-negative, aerobic, short-rod-shaped bacterium, designated strain CBS1P-1^T, was isolated from a surface-sterilized bark of Aegiceras corniculatum. Growth of strain CBS1P-1^T was observed with between 0 and 12.0 % (w/v) NaCl (optimally with 5.0 %) and at between pH 6.0-9.0. It grew at temperatures between 25-37 °C (optimum, 30 °C). Chemotaxonomic analysis showed that ubiquinone-10 was the respiratory quinone. The lipids comprised diphosphatidylglycerol, phosphatidylglycerol, an unidentified glycolipid, an unidentified phospholipid and an unidentified aminolipid. The major fatty acids of strain CBS1P-1^T were C_18 : 1  ω7c, C_16 : 0 and C_19 : 0 cyclo ω8c. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain CBS1P-1^T was most related to Pseudooceanicola antarcticus CGMCC 1.12662^T with a sequence similarity of 96.5 %. The average nucleotide identity and digital DNA-DNA hybridization values between strain CBS1P-1^T and P. antarcticus 1.12662^T were 77.5 and 21.1 %, respectively. The G+C content of the genomic DNA was 67.3 mol%. Based on phylogenetic, chemotaxonomic and phenotypic data, strain CBS1P-1^T is considered to represent a novel species of the genus Pseudooceanicola, for which the name Pseudooceanicola endophyticus is proposed. The type strain is CBS1P-1^T (=KCTC 62836^T=CGMCC 1.13743^T).