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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo International Journal of Systematic and Evolutionary Microbiology

Volume 75, Issue 4

sp. nov., sp. nov. and sp. nov. isolated from UV-irradiated soil in Korea Open Access

Abstract

Three novel bacterial strains, 172403-2, BT310 and BT731, were isolated from UV-irradiated soil samples collected in South Korea. All strains are Gram-negative, aerobic, non-motile and grow at 20–35 °C, optimally at 30 °C and pH 7.0. The optimal NaCl concentration for strains 172403-2 and BT310 is 1.5%, while strain BT731 grows optimally in the absence of NaCl (0.0%). Phylogenetic analysis based on 16S rRNA gene sequences positioned these strains within the genus , with strain 172403-2 closest to (95.96%), BT310 to (97.87%) and BT731 to (98.06%). Cellular fatty acid profiles identified C iso and Summed Feature 4 as predominant fatty acids. All strains contained ubiquinone MK-7 and phosphatidylethanolamine as major respiratory quinone and primary polar lipids, respectively. Genome sizes were 5.08 Mb for 172403-2, 4.29 Mb for BT310 and 4.66 Mb for BT731, with average nucleotide identity and digital DNA–DNA hybridization values with other species ranging between 70.41%–88.56% and 11.55%–24.66%, respectively. These biochemical, chemotaxonomic and phylogenetic analyses confirm that strains 172403-2, BT310 and BT731 represent three novel species of , proposed as sp. nov. (172403–2 = KCTC 62072 =NBRC 114967), sp. nov. (BT310 = KCTC 72363 = NBRC 114846) and sp. nov. (BT731 = KCTC 92910 = NBRC 116069).

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  • Accepted:
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Keyword(s): 16S rRNA , Hymenobacteraceae , Pontibacter , taxonomy and whole genome
Funding
This study was supported by the:
  • Seoul Women`s University
    • Principal Award Recipient: SathiyarajSrinivasan
  • National Institute of Biological Resources (Award NIBR202002203, NIBR202203205)
    • Principal Award Recipient: SathiyarajSrinivasan
© 2025 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License. This article was made open access via a Publish and Read agreement between the Microbiology Society and the corresponding author’s institution.
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2025-04-28
2026-02-14

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Pontibacter rufus sp. nov., Pontibacter humidus sp. nov. and Pontibacter coccineus sp. nov. isolated from UV-irradiated soil in Korea
Int J Syst Evol Microbiol 75, 006755 (2025); https://doi.org/10.1099/ijsem.0.006755
/content/journal/ijsem/10.1099/ijsem.0.006755
/content/journal/ijsem/10.1099/ijsem.0.006755
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