1887

Abstract

Two bacterial strains, Y60-23 and HN-65, were isolated from marine sediment samples collected from Xiaoshi Island, Weihai, and Dongzhai Harbour, Haikou, PR China, respectively. Based on the 16S rRNA gene sequences, strain Y60-23 exhibited 96.0% similarity to its most related type strain KCTC 52487, while strain HN-65 exhibited 97.3% similarity to its most related type strain 2ED5. The 16S rRNA gene sequence similarity between the two strains was 95.8%. Phylogenetic analysis based on 16S rRNA gene sequences showed that strains Y60-23 and HN-65 belonged to the genus . Cells of strains Y60-23 and HN-65 were rod-shaped, Gram-stain-negative, aerobic, non-motile, prosthecate and multiplied by binary fission. The major cellular fatty acids (>10.0%) of strain Y60-23 were C 7 and C, while those of strain HN-65 were iso-C 9, iso-C and C 7. The major respiratory quinone in both strains was ubiquinone-10 (Q-10) and the major polar lipids were monoglycosyl diglyceride, sulfoquinovosyl diacylglycerol and glucuronopyranosyl diglyceride. The genomic DNA G+C contents of strains Y60-23 and HN-65 were 63.9 and 60.7 mol%, respectively. The average nucleotide identity value between the two strains was 72.1% and the DNA–DNA hybridization value was 18.4%, clearly distinguishing them from each other. According to the results of the phenotypic, chemotaxonomic, phylogenetic and genomic analyses, the two strains represented two novel species within the genus , for which the names sp. nov. and sp. nov. were proposed with the type strains Y60-23 (=MCCC 1H01433=KCTC 8172) and HN-65 (=MCCC 1H01434=KCTC 8169), respectively.

Funding
This study was supported by the:
  • National Natural Science Foundation of China (Award 32070002)
    • Principle Award Recipient: Zong-JunDu
  • National Natural Science Foundation of China (Award 92351301)
    • Principle Award Recipient: Zong-JunDu
  • Science and Technology Fundamental Resources Investigation Program (Award Grant number 2022FY101100)
    • Principle Award Recipient: Zong-JunDu
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2024-09-05
2024-11-10
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