Algibacter marinivivus sp. nov., isolated from the surface of a marine red alga

A Gram-stain-negative, non-flagellated bacterium, designated ZY111 T , was isolated from the surface of a marine red alga, which was collected from the coast in Weihai, Shandong Province, PR China. Strain ZY111 T exhibited growth at 4–37 °C (optimum, 25–28 °C) in the presence of 0–8.0 % (w/v) NaCl (optimum, 2.0–4.0% NaCl) and at pH 6.5–9.5 (optimum, pH 7.0–8.0). The 16S rRNA gene sequence analysis revealed that strain ZY111 T belonged to the genus Algibacter , with Algibacter amylolyticus DSM 29199 T as its closest relative (97.7 % similarity). The averagenucleotide identity value of strain ZY111 T with A. amylolyticus DSM 29199 T was 79.03 %. The digitalDNA–DNA hybridization value of strain ZY111 T with A. amylolyticus DSM 29199 T was 22.40 %. The dominant fatty acids were iso-C 15 : 0 , iso-C 15 : 1 G, iso-C 15 : 0 3-OH and iso-C 17 : 0 3-OH. The sole respiratory quinone was determined to be menaquinone-6. The polar lipid profile of strain ZY111 T consisted of phosphatidylethanolamine, two unidentified aminolipids and three unidentified lipids. The G+C content was 31.9 mol%. The phenotypic, chemotaxonomic and phylogenetic data clearly showed that strain ZY111 T represents a novel species of the genus Algibacter , for which the name Algibacter marinivivus sp. nov. is proposed. The type strain is ZY111 T (=KCTC 62373 T =MCCC 1H00295 T ).