Arenibacter catalasegens sp. nov., isolated from marine surface sediment, and emended description of the genus Arenibacter

• Published in: International journal of systematic and evolutionary microbiology Vol. 68; no. 3; pp. 758 - 763
• Main Authors: Li, An-Zhang, Lin, Long-Zhen, Zhang, Ming-Xia, Lv, Yingying, Zhu, Hong-Hui
• Format: Journal Article
• Language: English
• Published: England 01.03.2018
• Subjects: marine sediment; Arenibacter; Ross Sea; Antarctica; Flavobacteriaceae; polyphasic taxonomy
• ISSN: 1466-5026; 1466-5034
• DOI: 10.1099/ijsem.0.002576

A Gram-staining-negative, aerobic, non-motile, rod-shaped bacterium, designated as P308H10 , was isolated from surface sediment of the Southern Indian Ocean. Growth occurred at 4-36 °C (optimum 20-25 °C), pH 6.0-8.5 (optimum 7.5-8.0) and in the presence of 1-8 % (w/v) NaCl (optimum 2-3 %). Phylogenetic analysis based on 16S rRNA gene sequences showed that strain P308H10 lies within the clade of members of the genus Arenibacter and is closely related to Arenibacterhampyeongensis HP12 (98.0 %), Arenibacterechinorum KMM 6032 (98.4 %), Arenibacterpalladensis LMG 21972 (97.9 %), Arenibactertroitsensis KMM 3674 (97.9 %) and 'Arenibacter algicola' TG409 (98.1 %). The average nucleotide identity and digital DNA-DNA hybridization values between strain P308H10 and the five reference strains were 85.9-80.6 % and 30.2-23.6 %, respectively. The major fatty acids (>10 %) of strain P308H10 were summed feature 3, iso-C17 : 0 3-OH, iso-C15 : 1 G and iso-C15 : 0. The major polar lipids comprised phosphatidylethanolamine, five unidentified aminolipids and four unidentified lipids. The only respiratory quinone was menaquinone-6. The genomic DNA G+C content was 38.2 mol%. On the basis of the phenotypic, phylogenetic and chemotaxonomic data presented, strain P308H10 represents a novel species of the genus Arenibacter, for which the name Arenibacter catalasegens sp. nov. is proposed. The type strain is P308H10 (=GDMCC 1.1230 =KCTC 52983 ). An emended description of the genus Arenibacter is also proposed.