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Abstract

A Gram-stain-negative, non-motile, rod-shaped, red-pigmented, facultatively anaerobic bacterium, designated SS2-9, was isolated from sediment collected from a sea cucumber culture pond located in Rongcheng, Shandong province, China. Cells of strain SS2-9 were approximately 0.3–0.5 µm in width and 1.5–6.0 µm in length. The strain was able to grow at 10–37 °C, at pH 6.5–8.5 and in the presence of 0.5–6.0 % (w/v) NaCl. It grew optimally at 28 °C and in the presence of 2.0 % (w/v) NaCl. The DNA G+C content was 34.5 mol% and the sole respiratory quinone was menaquinone 6 (MK-6). The predominant cellular fatty acids were C15 : 0, iso-C15 : 1 G, iso-C15 : 0 and iso-C17 : 0 3-OH. The major polar lipids were phosphatidylethanolamine, an unidentified phospholipid, two unidentified aminolipids and four unidentified lipids. Phylogenetic analyses based on 16S rRNA gene sequences revealed that strain SS2-9 was phylogenetically related to members of the genus Aquimarina and was closely related to Aquimarina amphilecti 92V (97.29 % similarity). On the basis of phenotypic, chemotaxonomic and phylogenetic data, strain SS2-9 was considered to represent a novel species of the genus Aquimarina , for which the name Aquimarina rubra sp. nov. is proposed. The type strain is SS2-9 (=KCTC 52274=MCCC 1H00142).

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2017-06-09
2019-10-14
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