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Abstract

Two Gram-stain-negative, aerobic, rod-shaped, non-motile and golden yellow pigmented bacteria, designated as SCSIO 75105 and SCSIO 75732, were isolated from sediment in the Pearl River Estuary, Guangdong Province, PR China. Cells were positive for catalase and oxidase. Growth occurred at 10–37 °C (optimum, 28 °C), pH 6.0–10.0 (optimum, pH 7.0) and 0–5.0 % (w/v) NaCl (optimum, 2.0–3.0 %). The 16S rRNA gene analysis indicated that these two isolates shared a similarity of 100 % each other. The 16S rRNA gene sequence analysis indicated that these two isolates showed highest similarity to CGMCC 1.14979 (97.3 %). However, a phylogenetic tree based on 288 orthologous clusters indicated that these two isolates were closely related to CPA5. The average nucleotide identity, average amino acid identity, digital DNA–DNA hybridization and evolutionary distance values between the two isolates and CPA5 were 73.7–74.0 %, 65.2 %, 19.5 % and 0.24, respectively. The genomic DNA G+C content of both isolates was 65.2 mol%. The major cellular fatty acids were C 7, C 6 and summed feature 3 (C 7 and/or C 6), and Q-10 was the respiratory quinone. The polar lipid profile contained diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylcholine, sphingoglycolipid and one unidentified glycolipid. On the basis of the results of phenotypic, physiological, chemotaxonomic and genotypic characterization, strains SCSIO 75105 and SCSIO 75732 are considered to represent a novel species in the genus , for which the name sp. nov. is proposed. The type strain is SCSIO 75105 (=KCTC 92502=MCCC 1K07993).

Funding
This study was supported by the:
  • National Key Research and Development Program (Award 2022YFC3103600)
    • Principle Award Recipient: JianpingYin
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2023-11-03
2024-07-25
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