Oceanisphaera aquimarina sp. nov., Isolated from Oil-Contaminated Sediment of Ocean Coastal Area from South Korea
Strain S33T was isolated from oil-contaminated sediment of Tae-an coastal region of South Korea. Cells are aerobic, motile, Gram staining-negative, and coccoid shaped. Strain S33T grew optimally at the temperature of 25 °C (range of 4–40 °C), pH 6.0 (range of pH 6.0–10.0), and in the presence of 1 % (w/v) NaCl (range of 0–10 %). Ubiquinone-8 was the predominant respiratory quinone. C16:0, summed feature 3 (comprising C16:1ω7c/C16:1ω6c) and C18:1ω7c were the major fatty acids. The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol, and diphosphatidylglycerol. Strain S33T showed the ability to degrade benzene, toluene, and ethylbenzene after 3 days incubation. 16S rRNA gene sequence analysis showed that the strain S33T was most closely related to Oceanisphaera sediminis TW92T (97.3 %), Oceanisphaera profunda SM1222T (97.2 %), and Oceanisphaera ostreae T-w6T (97.1 %) and <97 % with other members of the genus Oceanisphaera. The genomic DNA G+C mol% content of strain S33T was 51.0 mol%. Based on distinct phenotypic, genotypic, and phylogenetic analysis, strain S33T was proposed to represent a novel species in the genus Oceanisphaera as Oceanisphaera aquimarina sp. nov. (= KEMB 1002-058T = JCM 30 794T).
This research is supported by the National Research Foundation of Korea (NRF-2013M3A2A1067498) and (NRF-2015M3A9B8029697).
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