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

Volume 75, Issue 3

sp. nov. and sp. nov., isolated from the marine conch No Access

Abstract

The intertidal zone is an area located between the marine environment and the terrestrial environment and is exposed to various stresses. To investigate the mutualistic relationship between hosts and symbiotic micro-organisms inhabiting the intertidal zone, strains 2305UL8-3 and 2305UL8-7 were isolated from , a species living in the intertidal zone of Ulleungdo Island, South Korea. Both strains are Gram-stain-negative, catalase- and oxidase-positive and facultatively anaerobic. Strains 2305UL8-3 and 2305UL8-7 grow optimally at 30.0 °C and 28.0–30.0 °C, respectively, under conditions of pH 8.0 and 3.0 % (w/v) NaCl. They have Q-10 as the primary quinone, and their common main fatty acids are C and summed feature 8 (C 7c and/or C 6c). Additionally, their primary polar lipids include phosphatidylcholine and phosphatidylglycerol. The two novel strains have an arsenic reduction pathway that reduces the oxidation state of arsenic and are expected to influence environmental regulation processes through the catabolic sulphate reduction system. Based on these characteristics, they exhibit resistance potential to environmental stresses, specifically arsenic exposure in the intertidal zone, where arsenic contamination is often associated with pollution and tidal fluctuations. Analysing the 16S rRNA gene sequence similarity, strain 2305UL8-3 shared 96.60 % similarity with MME-070, while strain 2305UL8-7 showed 98.13 % similarity with M-M10. Polyphasic analysis revealed that strains 2305UL8-3 and 2305UL8-7 should be identified as novel species within the genera and , respectively. Therefore, sp. nov. with the type strain 2305UL8-3 (=KCTC 8475=MCCC 1K09523=JCM 37202) and sp. nov. with the type strain 2305UL8-7 (=KCTC 8476=MCCC 1K09524=JCM 37203) are proposed.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): Aliiroseovarius conchicola , genus metabolism , Reishia bronni , Roseovarius conchicola and Ulleung Island
Funding
This study was supported by the:
  • Hannam University
    • Principal Award Recipient: SeungHee Ha
  • Korea Research Institute of Ships and Ocean Engineering (Award 2021R1I1A3046479)
    • Principal Award Recipient: SeungHee Ha
  • National Marine Biodiversity Institute of Korea
    • Principal Award Recipient: SeungHee Ha
© 2025 The Authors
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2025-03-21
2026-02-06

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Roseovarius conchicola sp. nov. and Aliiroseovarius conchicola sp. nov., isolated from the marine conch Reishia bronni
Int J Syst Evol Microbiol 75, 006725 (2025); https://doi.org/10.1099/ijsem.0.006725
/content/journal/ijsem/10.1099/ijsem.0.006725
/content/journal/ijsem/10.1099/ijsem.0.006725
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