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Volume 73, Issue 10

sp. nov. and sp. nov., isolated from seawater No Access

Abstract

Two Gram-stain-negative, catalase- and oxidase-positive, aerobic non-motile and motile rod bacteria, strains MSW6 and RSW2, were isolated from surface seawater. Strain MSW6 optimally grew at 20 °C, pH 7.0 and 3 % NaCl, while strain RSW2 optimally grew at 25 °C, pH 7.0–8.0 and 2 % NaCl. Strain MSW6 possessed menaquinone-6 as the major respiratory quinone, and its major fatty acids were iso-C G, iso-C and iso-C 3-OH. The major polar lipid identified in strain MSW6 was phosphatidylethanolamine (PE). On the other hand, strain RSW2 had ubiquinone-8 as the predominant respiratory quinone, and its major fatty acids consisted of summed feature 3 (C 7 and/or C 6), summed feature 8 (C 7 and/or C 6) and C. The major polar lipids identified in strain RSW2 were PE and phosphatidylglycerol. As the sole respiratory quinone, strain MSW6 possessed menaquinone-6, while strain RSW2 had ubiquinone-8. The DNA G+C contents of strains MSW6 and RSW2 were 31.9 and 43.4 mol%, respectively. Phylogenetic analyses based on 16S rRNA and core gene sequences showed that strain MSW6 formed a phylogenic lineage with KOPRI 13649, while strain RSW2 formed a phylogenic lineage with KMM 3633. Strain MSW6 shared 97.9 % 16S rRNA gene sequence similarity and 80.7 % average nucleotide identity (ANI) ith KOPRI 13649, and strain RSW2 shared 99.1 % 16S rRNA gene sequence similarity and 93.1 % ANI with KMM 3633. Based on the results of phenotypic, chemotaxonomic and phylogenetic analyses, strains MSW6 and RSW2 represent novel species of the genera and , respectively, for which the names sp. nov. and sp. nov. are proposed, respectively. The type strain of is MSW6 (=KACC 22338=JCM 35022) and the type strain of is RSW2 (=KACC 22716=JCM 35550).

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  • Accepted:
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Keyword(s): Bacteroidota , Marinomonas maritima , new taxa , Pseudomonadota , Psychroserpens ponticola and seawater
Funding
This study was supported by the:
  • Chung-Ang University (Award 2023)
    • Principle Award Recipient: SungChul Lee
  • National Institute of Biological Resources (Award NIBR202304204)
    • Principle Award Recipient: CheOk Jeon
© 2023 The Authors
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2023-10-13
2024-05-08
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Psychroserpens ponticola sp. nov. and Marinomonas maritima sp. nov., isolated from seawater
Int J Syst Evol Microbiol 73, 006090 (2023); https://doi.org/10.1099/ijsem.0.006090
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