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

Volume 74, Issue 2

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

Abstract

Two Gram-stain-negative, strictly aerobic rods, designated as RMAR6-6 and KMA01, exhibiting catalase- and oxidase-positive activities, were isolated from marine red algae in the Republic of Korea. Cells of strain RMAR6-6 exhibited flagellar motility, while those of strain KMA01 were non-motile. Strain RMAR6-6 exhibited optimal growth at 30–35°C and pH 7.0–8.0 with 4.0–6.0 % (w/v) NaCl, while strain KMA01 grew optimally at 30–35 °C, pH 7.0–8.0 and 2.0–5.0% NaCl. Both strains shared common major respiratory isoprenoid quinone (ubiquinone-10), cellular fatty acids (C, C 7 11-methyl, C 7 and summed feature 8) and polar lipids (phosphatidylglycerol, phosphatidylmonomethylethanolamine, diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine and sulphoquinovosyldiacylglycerol). The genomic DNA G+C contents were 59.0 and 55.0 mol% for strains RMAR6-6 and KMA01, respectively. With 98.5 % 16S rRNA gene similarity, 75.2 % average nucleotide identity (ANI) and 19.8 % digital DNA–DNA hybridization (dDDH) values, strains RMAR6-6 and KMA01 were identified as representing distinct species. Phylogenetic analyses based on both 16S rRNA gene and genome sequences revealed that strains RMAR6-6 and KMA01 formed distinct phylogenic lineages within the genus , most closely related to IAM 12614 and CECT 5094, respectively. The ANI and dDDH values between strain RMAR6-6 and IAM 12614 were 87.5 and 33.3 %, respectively. Similarly, the values between KMA01 and CECT 5094 were 74.2 % (ANI) and 19.3 % (dDDH). Based on phenotypic, chemotaxonomic and molecular characteristics, strains RMAR6-6 and KMA01 represent two novel species of the genus , for which the names sp. nov. (RMAR6-6=KACC 22482=JCM 34977) and sp. nov. (KMA01=KACC 22479=JCM 34597) are proposed, respectively.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): marine red algae , new taxa , Pseudomonadota , Roseibium algicola and Roseibium porphyridii
Funding
This study was supported by the:
  • National Institute of Biological Resources (Award NIBR No. 2022-02-001)
    • Principle Award Recipient: CheOk Jeon
  • Ministry of Oceans and Fisheries (Award 20210469)
    • Principle 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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2024-02-28
2025-03-16
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Roseibium algicola sp. nov. and Roseibium porphyridii sp. nov., isolated from marine red algae
Int J Syst Evol Microbiol 74, 006283 (2024); https://doi.org/10.1099/ijsem.0.006283
/content/journal/ijsem/10.1099/ijsem.0.006283
/content/journal/ijsem/10.1099/ijsem.0.006283
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