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

Volume 75, Issue 12

sp. nov., an alginate-degrading bacterium isolated from sediment Open Access

Abstract

A marine bacterium capable of degrading alginate, designated as strain TSD2052, was isolated from a tidal flat sediment sample collected in Taean County, Republic of Korea. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain TSD2052 belonged to the genus showing 96.2–97.8% sequence similarity. The whole genome of strain TSD2052 was 4.62 Mb, with a DNA G+C content of 44.3 mol%. The average nucleotide identity, average amino acid identity and digital DNA–DNA hybridization values between strain TSD2052 and all genome-sequenced species of the genus were below 76.7%, 81.7% and 20.6%, respectively, indicating values lower than the standard cut-off for species delineation. Growth was observed at 10–35 °C (optimum 25 °C), pH 6–10 (optimum pH 8) and 1–5% (w/v) NaCl (optimum 3%). The major fatty acids (>10%) were C, C, summed feature 3 (C 6 and/or Cω) and summed feature 8 (C 6 and/or Cω). The respiratory quinone was ubiquinone-8. The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol, an unidentified aminolipid and four unidentified lipids. Based on the results of phenotypic characterization, phylogenetic analysis and genome-based comparisons, strain TSD2052 represents a novel species in the genus , for which we propose the name sp. nov. (=KCTC 92288=JCM 35392).

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  • Accepted:
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Keyword(s): Agarivorans sediminis , Alteromonadaceae and sediment
Funding
This study was supported by the:
  • MABIK in-house program (Award 2025M00600)
    • Principal Award Recipient: NotApplicable
© 2025 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution NonCommercial License.
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2025-12-03
2025-12-15

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Agarivorans sediminis sp. nov., an alginate-degrading bacterium isolated from sediment
Int J Syst Evol Microbiol 75, 006988 (2025); https://doi.org/10.1099/ijsem.0.006988
/content/journal/ijsem/10.1099/ijsem.0.006988
/content/journal/ijsem/10.1099/ijsem.0.006988
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