1887

Abstract

Strain 12-3 was isolated from seawater of the Guanyinshan Coast, Xiamen, Fujian Province, PR China. The bacterium was Gram-stain-negative, rod-shaped, aerobic, oxidase-positive and catalase-negative. Growth of strain 12-3 occurred at 10–37 °C (optimum, 20–30 °C), at pH 5.0–11.0 (optimum, pH 7.0–8.0) and at a salinity range of 0–10 % (optimum, 3–5 %). The results of phylogenetic analysis based on its 16S rRNA gene sequence indicated that strain 12-3 belonged to the genus and had the highest sequence similarity to HDM-25 (97.4 %), followed by SW-3 (96.9 %), MJ17 (96.9 %), F14 (96.8 %) and other species in the genus (95.3–96.5 %). The average nucleotide identity (ANI) and DNA–DNA hybridization (DDH) values between strain 12-3 and HDM-25 were 76.1 and 17.0 %, respectively. ANI and DDH values between strain 12-3 and SW-3 were 78.9 and 18.2 %, respectively. The principal fatty acid of strain 12-3 was summed feature 8 (C 6/7) and C. The respiratory quinone of strain 12-3 was Q10. The polar lipids included phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol and an unidentified glycolipid. The G+C content of the chromosomal DNA was 63.9 mol%. The combination of the results of the phylogenetic, phenotypic and chemotaxonomic analyses, and its low ANI and DDH values indicate that strain 12-3 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is 12-3 (=MCCC 1A16381=KCTC 72687).

Funding
This study was supported by the:
  • Instituto Nacional de Ciência e Tecnologia Centro de Estudos das Adaptações da Biota Aquática da Amazônia (BR) (Award NIMR-2019-9)
    • Principle Award Recipient: Zongze Shao
  • Xiamen Ocean Economic Innovation and Development Demonstration Project (Award 16PZP001SF16)
    • Principle Award Recipient: Zongze Shao
  • Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (CAS) (Award QYZDJ-SSW-DQC018-02)
    • Principle Award Recipient: Zhiqiang Yu
  • Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (Award 2017BT01Z134)
    • Principle Award Recipient: Zhiqiang Yu
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2020-06-24
2024-11-14
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