1. Marinomonas profundi sp. nov., isolated from deep seawater of the Mariana Trench
- Author
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Xiao-Meng Sun, Qi-Long Qin, Shou-Jin Fan, Xiu-Lan Chen, Yi Li, Yu-Zhong Zhang, Xi-Ying Zhang, Hai-Nan Su, Xiao-Yan Song, and Jian Li
- Subjects
Phosphatidylglycerol ,Marinomonas ,biology ,Strain (chemistry) ,Stereochemistry ,General Medicine ,16S ribosomal RNA ,biology.organism_classification ,Microbiology ,chemistry.chemical_compound ,chemistry ,Mariana Trench ,Seawater ,Nitrite ,Ecology, Evolution, Behavior and Systematics ,Bacteria - Abstract
A Gram-stain-negative, aerobic, polarly flagellated, straight or curved rod-shaped bacterium, designated strain M1K-6T, was isolated from deep seawater samples collected from the Mariana Trench. The strain grew at −4 to 37 °C (optimum, 25–30 °C), at pH 5.5–10.0 (optimum, pH 7.0) and with 0.5–14.0 % (w/v) NaCl (optimum, 2.0 %). It did not reduce nitrate to nitrite nor hydrolyse gelatin or starch. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain M1K-6T was affiliated with the genus Marinomonas , sharing 93.1–97.0 % sequence similarity with the type strains of recognized Marinomonas species. The major cellular fatty acids were summed feature 3 (C16 : 1 ω6c/C16 : 1 ω7c), summed feature 8 (C18 : 1 ω7c/C18 : 1 ω6c), C16 : 0, C10 : 0 3-OH and C18 : 0. The predominant respiratory quinone was ubiquinone-8. Polar lipids of strain M1K-6T included phosphatidylethanolamine, phosphatidylglycerol and two unidentified lipids. The genomic G+C content of strain M1K-6T was 46.0 mol%. Based on data from the present polyphasic study, strain M1K-6T was considered to represent a novel species within the genus Marinomonas , for which the name Marinomonas profundi sp. nov. is proposed. The type strain is M1K-6T (=KCTC 72501T=MCCC 1K03890T).
- Published
- 2020
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