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Abstract

A Gram-stain-negative, aerobic, non-spore-forming, non-flagellated and rod-shaped or ovoid bacterial strain, designated RA1, was isolated from faeces collected from Beluga whale () in Yeosu aquarium, South Korea. Strain RA1 grew optimally at 25 °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 RA1 joins the cluster comprising the type strains of three species of the genus , with which it exhibited 95.8–96.0 % sequence similarity. Sequence similarities to the type strains of other recognized species were less than 94.3 %. Strain RA1 contained Q-8 as the predominant ubiquinone and summed feature 3 (Cω7 and/or Cω6), Cω7 and C as the major fatty acids. The major polar lipids of strain RA1 were phosphatidylethanolamine, phosphatidylglycerol, two unidentified lipids and one unidentified aminolipid. The DNA G+C content of strain RA1 was 47.4 mol%. The differential phenotypic properties, together with the phylogenetic distinctiveness, revealed that strain RA1 is separated from other species of the genus . On the basis of the data presented, strain RA1 is considered to represent a novel species of the genus , for which the name sp. nov. is proposed. The type strain is RA1 ( = KCTC 42154 = NBRC 110551).

Funding
This study was supported by the:
  • , National Fisheries Research and Development Institute (NFRDI)
  • , Ministry of Science, ICT & Future Planning (MSIP) of the Republic of Korea , (Award NRF-2013M3A9A5075953)
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2014-12-01
2021-01-28
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