Journal
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
Volume 64, Issue -, Pages 719-724Publisher
SOC GENERAL MICROBIOLOGY
DOI: 10.1099/ijs.0.057513-0
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Funding
- National Institute of Biological Resources (NIBR) - Ministry of Environment (MOE)
- Program for Collection, Management and Utilization of Biological Resources
- BK 21 program from the Ministry of Science, ICT & Future Planning (MSIP) of the Republic of Korea
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A Gram-stain-negative, non-spore-forming, non-flagellated, rod-shaped bacterial strain, SSK2-1(T), was isolated from the zone where the ocean and a freshwater spring meet at Jeju island, South Korea, and subjected to a polyphasic taxonomic study. Strain SSK2-1(T) grew optimally at 30 degrees C, at pH 7.0-8.0 and in the presence of 2.0% (w/v) NaCl. Neighbour-joining, maximum-likelihood and maximum-parsimony phylogenetic trees based on 16S rRNA gene sequences revealed that strain SSK2-1(T) clustered with the type strains of two Octadecabacter species, showing 96.5-96.8 % 16S rRNA gene sequence similarity. Strain SSK2-1(T) and Octadecabacter arcticus DSM 13978(T) contained Q-10 as the predominant ubiquinone and C-18:1 omega 7c as the common major fatty acid. The polar lipid profile of strain SSK2-1(T). was similar to that of 0. arcticus DSM 13978(T) by having phosphatidylcholine, phosphatidylglycerol and one unidentified aminolipid as the major components. The DNA G+C content of strain SSK2-1(T) was 60.1 mol%. Differential phenotypic properties, particularly temperature range for growth, oxidase activity and nitrate reduction, together with phylogenetic distinctiveness, revealed that strain SSK2-1(T) is separate from recognized species of the genus Octadecabacter. On the basis of the data presented, strain SSK2-1(T) is considered to represent a novel species of the genus Octadecabacter, for which the name Octadecabacter jejudonensis sp. nov. is proposed. The type strain is SSK2-1(T) (=KCTC 32535(T)=CECT 8397(T)).
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