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Abstract

Two Gram-stain-negative, rod-shaped, non-motile, strictly aerobic strains, forming yellow colonies and designated F6058 and S2608, were isolated from marine sediment collected in Weihai, PR China. Both strains grow at 4–40 °C (optimum, 30–33 °C), pH 6.0–7.5 (optimum, pH 6.5) and in the presence of 0–7.0 % (w/v) NaCl. The optimum NaCl concentrations for strains F6058 and S2608 were 2.0 % and 2.5 %, respectively. Phylogenetic analysis of the 16S rRNA gene sequences indicated that strains F6058 and S2608 share an evolutionary lineage with members of the genus . The isolates exhibited a 16S rRNA gene sequence similarity of 96.7 % to each other. Strains F6058 exhibited the highest 16S rRNA gene sequence similarity to F64183 (98.8 %), and S2608 was most similar to A71 (96.9 %). Iso-C, anteiso-C and iso-C 3-OH were the major fatty acids of strains F6058 and S2608. The sole respiratory quinone of both isolates was menaquinone 6 (MK-6). The polar lipid profiles of the isolates both consisted of phosphatidylethanolamine and phosphoglycolipids; however, strain F6058 exhibited one glycolipid, one aminolipid and two unidentified polar lipids, and strain S2608 also had two glycolipids and one unidentified polar lipid. The DNA G+C contents of strains F6058 and S2608 were 34.6 % and 37.7 mol%, respectively. Based on their phenotypic, chemotaxonomic and genomic characteristics, strains F6058 and S2608 were considered to represent novel species of the genus , for which the names sp. nov. and sp. nov. were proposed. The type strains are F6058 (=KCTC 92653=MCCC 1H01358) and S2608 (KCTC 92652=MCCC 1H01361).

Funding
This study was supported by the:
  • National Natural Science Foundation of China (Award 41876166)
    • Principle Award Recipient: Da-shuaiMu
  • Science & Technology Fundamental Resources Investigation Program (Award Grant No.2019FY100700, 2022FY101100)
    • Principle Award Recipient: Zong-junDu
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2024-06-21
2024-07-15
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