Marinicaulis aureum sp. nov., isolated from a culture of the green alga Ulva prolifera, and emended description of the genus Marinicaulis
2019
Wang, Zengmeng | Zhang, Zenghu | Li, Chengcheng | Hu, Zhenzhen | Zhao, Hanshuang | Zhang, Yongyu
A Gram-stain negative, facultatively anaerobic, rod-shaped motile bacterium with a single polar flagellum, designed strain HHTR114ᵀ, was isolated from a culture of the green alga Ulva prolifera obtained from offshore seawater at Qingdao, China. Optimum growth occurred in the presence of 2–3% (w/v) NaCl, at pH 7.0–8.0 and 30 °C. The major fatty acids (> 10% of total fatty acids) were C₁₆:₀ (24.7%), C₁₈:₁ω7c 11-methyl (24.3%) and summed feature 3 (C₁₆:₁ω6c and/or C₁₆:₁ω7c, 19.7%). The major polar lipids were phosphatidylethanolamine, glycolipid and four unidentified polar lipids. The DNA G + C content of strain HHTR114ᵀ calculated on the basis of the genome sequence was 58.2% and the genome size is 4.1 Mbp. The predominant isoprenoid quinone was Q-10. The estimated DNA–DNA hybridization values were 21.4% [18.6–24.4%] between strain HHTR114ᵀ and Marinicaulis flavus SY-3-19ᵀ. On the basis of polyphasic analysis, strain HHTR114ᵀ is considered to represent a novel species, for which the name Marinicaulis aureum sp. nov. is proposed. The type strain of the type species is HHTR114ᵀ (= KCTC 62394ᵀ = MCCC 1K03481ᵀ).
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