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Volume 72, Issue 4

sp. nov., isolated from the phycosphere of No Access

Abstract

A novel bacterial strain, designated MK52, was isolated from the phycosphere of . Strain MK52 is a Gram-stain-negative, pink-pigmented, rod-shaped, strictly aerobic bacterium. In 16S rRNA phylogenetic analysis, the MK52 strain was most closely related to RW1 (98.66 %) and UM2 (98.51 %). The genomic DNA G+C content of strain MK52 was calculated to be 65.5 mol%. The average nucleotide identity values of strain MK52 with RW1 and UM2 were 80.35 and 80.23 %, respectively, with digital DNA–DNA hybridization values of 23.6 and 22.9 %, respectively, and average amino acid identities of 75.59 and 75.79 %, respectively. The major isoprenoid quinone was Q-10, and the predominant polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and sphingoglycolipid. Fatty acid methyl ether analysis showed that summed feature 8 (C ω7 and/or C ω6) was the main cellular fatty acid in strain MK52. Strain MK52 cells grew at 21–34 °C (optimum, 30 °C), pH 5–8 (optimum, pH 7) and with 0–2 % (w/v) NaCl (optimum, 0.5 % NaCl). sp. nov. is proposed as a new species (=KCTC 72877=DSM 111424) based on its genotypic and phenotypic characteristics.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): Alphaproteobacteria , cyanobacteria , freshwater , Microcystis aeruginosa , Rhizorhabdus and sphingolipid
Funding
This study was supported by the:
  • National Institute of Biological Resources (Award NIBR202002108)
    • Principle Award Recipient: WoojunPark
© 2022 The Authors
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2022-04-21
2024-05-04
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Rhizorhabdus phycosphaerae sp. nov., isolated from the phycosphere of Microcystis aeruginosa
Int J Syst Evol Microbiol 72, 005324 (2022); https://doi.org/10.1099/ijsem.0.005324
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