Oceanicola antarcticus sp. nov. and Oceanicola flagellatus sp. nov., moderately halophilic bacteria isolated from seawater

Ying Yi Huo, Zheng Yang Li, Hong You, Chun Sheng Wang, Anton F. Post, Aharon Oren, Xue Wei Xu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Two Gram-stain-negative, aerobic, moderately halophilic, rod-shaped bacteria (strains Ar-45T and DY470T) were isolated from seawater collected from the Southern Ocean and the Pacific Ocean, respectively. Growth of strain Ar-45T was observed with between 0.5 and 10.0% (w/v) NaCl (optimally with 0.5–3.0%) and between pH 5.5 and 9.5. Strain DY470T grew in the presence of 0.5–7.5% (w/v) NaCl (optimally with 2.0%) and at pH 5.5–8.5. Chemotaxonomic analysis showed Q-10 as the respiratory quinone for both strains. The major fatty acids (.5%) of strain Ar-45T were C16: 0, C19: 0 cyclo ɷ8c and C18: 1ɷ7c, while those of strain DY470T were C18: 1ɷ7c, C16: 0 and 11-methyl C18: 1ɷ7c. The DNA G+C contents of the two strains were 62.0 and 61.8 mol%, respectively. Phylogenetic analyses based on 16S rRNA gene sequences showed that strains Ar-45T and DY470T were related most closely to the genus Oceanicola, with sequence similarities of 97.4–94.0 and 97.7–94.7%, respectively. The DNA–DNA hybridization value between strain Ar-45T and Oceanicola marinus LMG 23705T was 22.0%. Levels of DNA-DNA relatedness between strain DY470T and Oceanicola nitratireducens LMG 24663T and Oceanicola batsensis DSM 15984T were 32.5 and 26.1%, respectively. Based on phylogenetic, chemotaxonomic and phenotypic data, strains Ar-45T and DY470T are considered to represent two novel species of the genus Oceanicola, for which the names Oceanicola antarcticus (type strain Ar-45T=CGMCC 1.12662T=LMG 27868T) and Oceanicola flagellatus (type strain DY470T=CGMCC 1.12664T=LMG 27871T) are proposed.

Original languageAmerican English
Pages (from-to)2975-2979
Number of pages5
JournalInternational Journal of Systematic and Evolutionary Microbiology
StatePublished - 1 Sep 2014

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