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

Volume 74, Issue 11

sp. nov. and sp. nov., isolated from marine red algae Open Access

Abstract

Two Gram-stain-negative, strictly aerobic, non-motile, rod-shaped bacteria, designated as strains S88 and W115, exhibiting catalase- and oxidase-positive reactions, were isolated from marine red algae in South Korea. Strain S88 exhibited growth at 20–30 °C, pH 6.0–9.0 and 2.0–5.0% (w/v) NaCl, while strain W115 grew at 20–30 °C, pH 7.0–9.0 and 2.0–5.0% (w/v) NaCl. Strain S88 contained summed feature 8 (C 7 and/or C 6), C and C 2-OH as major fatty acids (>5%), with major polar lipids being phosphatidylglycerol, phosphatidylcholine, an unidentified phospholipid, an unidentified aminolipid and two unidentified lipids. Strain W115 contained summed feature 8 (C 7 and/or C 6) and C as major fatty acids (>5%), with major polar lipids including phosphatidylglycerol, phosphatidylcholine, an unidentified phospholipid, an unidentified aminolipid and unidentified lipids. Ubiquinone-10 was the sole respiratory quinone in both strains, and the genomic DNA G+C contents were 57.0% for strain S88 and 56.5% for strain W115. Despite 99.86% 16S rRNA gene sequence similarity, strains S88 and W115 shared 88.8% average nucleotide identity (ANI) and 36.8% digital DNA–DNA hybridization (dDDH) value, indicating different species. Phylogenetic and phylogenomic analyses based on 16S rRNA gene and genome sequences, respectively, revealed that strains S88 and W115 formed a phylogenetic lineage within the genus . ANI and dDDH values of both strains with other type strains were less than 73.7 and 20.3%, respectively, confirming that they represent novel species. Based on phenotypic, chemotaxonomic and molecular characteristics, strains S88 and W115 represent two novel species of the genus , for which the names sp. nov. (S88 =KACC 23423 =JCM 36647) and sp. nov. (W115 =KACC 23690 =JCM 36651) are proposed, respectively.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): marine red algae , new taxa , Pseudomonadota , Roseovarius phycicola and Roseovarius rhodophyticola
Funding
This study was supported by the:
  • Chung-Ang University (Award 2024)
    • Principal Award Recipient: CheOk Jeon
  • National Institute of Biological Resources (Award NIBR No. 2024-02-001)
    • Principal Award Recipient: CheOk Jeon
© 2024 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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2024-11-11
2025-11-13

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Roseovarius phycicola sp. nov. and Roseovarius rhodophyticola sp. nov., isolated from marine red algae
Int J Syst Evol Microbiol 74, 006574 (2024); https://doi.org/10.1099/ijsem.0.006574
/content/journal/ijsem/10.1099/ijsem.0.006574
/content/journal/ijsem/10.1099/ijsem.0.006574
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