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Volume 70, Issue 10

sp. nov., isolated from a freshwater mesocosm Free

Abstract

A bacterial strain, designated FSY-8, was isolated from a freshwater mesocosm in Taiwan and characterized using the polyphasic taxonomy approach. Cells of strain FSY-8 were aerobic, Gram-stain-negative, rod-shaped, non-motile and formed yellow coloured colonies on Reasoner's 2A agar. Growth occurred at 20–40 °C (optimum, 30–37 °C) and pH 5–7 (optimum, pH 6) and in the presence of 0–0.5 % NaCl (optimum, 0 %, w/v). The major fatty acids (>10 %) of strain FSY-8 were summed feature 8 (C 7 and/or C 6) and summed feature 3 (C 7 and/or C 6). The polar lipid profile consisted of a mixture of phosphatidylethanolamine, phosphatidylglycerol, phosphatidylcholine, phosphatidylmonomethylethanolamine, phosphatidyldimethylethanolamine, sphingoglycolipid, diphosphatidylglycerol, an uncharacterized aminophospholipid, an uncharacterized glycolipid and an uncharacterized lipid. The major polyamine was spermidine. The major isoprenoid quinone was Q-10. The DNA G+C content was 64.8 mol %. Phylogenetic analyses based on 16S rRNA gene sequences and coding sequences of 92 protein clusters indicated that strain FSY-8 formed a phylogenetic lineage in the genus . Strain FSY-8 showed 71.6–77.2 % average nucleotide identity and 19.9–22.8 % digital DNA–DNA hybridization identity with the strains of other species. On the basis of phenotypic and genotypic properties and phylogenetic inference, strain FSY-8 should be classified in a novel species of the genus , for which the name sp. nov. is proposed. The type strain is FSY-8 (=BCRC 81051=LMG 30053=KCTC 52812).

  • Received:
  • Accepted:
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Keyword(s): Alphaproteobacteria , freshwater mesocosm , Novosphingobium ovatum sp. nov. and Sphingomonadaceae
© 2020 The Authors
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2020-09-04
2024-04-25
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Novosphingobium ovatum sp. nov., isolated from a freshwater mesocosm
Int J Syst Evol Microbiol 70, 5243 (2020); https://doi.org/10.1099/ijsem.0.004402
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