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Aestuariibaculum marinum sp. nov., a marine bacterium isolated from seawater in South Korea

  • Microbial Systematics and Evolutionary Microbiology
  • Published:
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Abstract

A Gram-negative, non-motile, aerobic bacterium, designated strain IP7T, was isolated from seawater at the shore of the Incheon Eulwang-ri beach, South Korea. Cells of strain IP7T are straight or slightly rod-shaped and colonies are round, convex and orange-yellow. Strain IP7T is flexirubin-negative, mild halophile, catalase-and oxidase-positive, and produces a yellow-orange carotenoid pigment. Growth is optimal at 30°C, pH 7–9, and 2.0–4.0% NaCl (w/v). On the basis of 16S rRNA gene sequence similarity, strain IP7T is affiliated with genus Aestuariibaculum in the family Flavobacteriaceae, the closest relative being Aestuariibaculum suncheonense SC17T (98.3% sequence similarity). The DNA G + C content of the novel strain is 37.4 mol%. The only quinone is MK-6 menaquinone. Iso-branched C15:0, iso-branched C15:1 G, and iso-branched C17:0 3-OH are major fatty acids. The major polar lipids are phosphatidylethanolamine, an unidentified aminoglycolipid and two unidentified glycolipids. The DNA-DNA hybridization value of strain IP7T with Aestuariibaculum suncheonense SC17T is 28.87%. Based on the collective DNA-DNA hybridization, biochemical, phylogenetic and physiological data, we report a novel species of the genus Aestuariibaculum for which the name Aestuariibaculum marinum sp. nov. is proposed. The type strain is IP7T (= KCTC 52521T = JCM 31725T).

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Authors and Affiliations

  1. Department of Life Science, Dongguk University-Seoul, Goyang, 10326, Republic of Korea

    Jiwon Choi, Dongwook Lee, Jun Hyeong Jang, Seho Cha & Taegun Seo

  2. Water Supply and Sewerage Research Division, National Institute of Environmental Research, Incheon, 22689, Republic of Korea

    Jun Hyeong Jang

Authors
  1. Jiwon Choi
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  2. Dongwook Lee
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  3. Jun Hyeong Jang
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  4. Seho Cha
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  5. Taegun Seo
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Corresponding author

Correspondence to Taegun Seo.

Additional information

Supplemental material for this article may be found at http://www.springerlink.com/content/120956.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain IP7T is KX172130.

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Choi, J., Lee, D., Jang, J.H. et al. Aestuariibaculum marinum sp. nov., a marine bacterium isolated from seawater in South Korea. J Microbiol. 56, 614–618 (2018). https://doi.org/10.1007/s12275-018-8134-z

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  • DOI: https://doi.org/10.1007/s12275-018-8134-z

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