1887

Abstract

A novel strain, designated AQ6-296, was isolated from a soil sample collected in Fildes Peninsula, Antarctic. Cells were Gram-stain-negative, non-endospore-forming, non-motile, strictly aerobic and rod-shaped. Growth occurred at 4–28 °C (optimum, 20 °C) and at pH 6.0–7.0 (optimum, pH 7.0). NaCl was not obligatory for growth. Colonies were pale yellow after growth for 3 days at 20 °C on Reasoner's 2A agar. The strain was weakly positive for oxidase and the catalase test was negative. The only respiratory quinone was Q-8. The predominant cellular fatty acids were iso-C, iso-C, iso-C 3OH, summed feature 3 (comprising Cω7 and/or Cω6) and summed feature 9 (comprising iso-Cω9 and/or C10-methyl). The major polar lipids were phosphatidylethanolamine, unknown aminolipids, phosphatidylglycerol and diphosphatidylglycerol. The results of phylogenetic analysis based on 16S rRNA gene sequences (the highest similarity at 92.4 % to ) indicated that strain AQ6-296 is within the family . The DNA G+C content of the type strain was 58.6 mol%. On the basis of phenotypic, chemotaxonomic and phylogenetic data, strain AQ6-296 is considered to represent a novel genus and species in the family , for which the name gen. nov., sp. nov. is proposed. The type strain is AQ6-296 (CCTCC AB 2016313=KCTC 52744).

Funding
This study was supported by the:
  • Fang Peng , Chinese Polar Scientific Strategy Research Fund , (Award IC201706)
  • Fang Peng , National Natural Science Foundation of China , (Award 31270538)
  • Fang Peng , R&D Infrastructure and Facility Development Program , (Award NIMR-2019-8)
  • Fang Peng , National Key R&D Program of China , (Award 2018YFC1406701)
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2020-02-04
2020-08-08
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