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Abstract

A novel actinobacterial strain (NEAU-HV9) showing antibacterial activity against and herbicidal activity against L. was isolated from soil sampled in Bama yao Autonomous County, Hechi City, Guangxi Zhuang Autonomous Region. The strain is aerobic and Gram-positive. Phylogenetic analysis based on 16S rRNA gene sequence indicated that strain NEAU-HV9 belonged to the genus and showed high 16S rRNA sequence similarity to 1MR-8 (98.90 %), JR-39 (98.89 %) and JA03 (98.69 %) and less than 98.5 % similarity to other members of the genus . The cell wall of strain NEAU-HV9 contained -diaminopimelic acid and the whole-cell hydrolysates were galactose, mannose and ribose. The predominant menaquinones were composed of MK-9(H) and MK-9(H). The major polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol and phosphatidylinositol. The major fatty acids were C, isoC and C 8. The genomic DNA G+C content of strain NEAU-HV9 was 70.6 mol%. Furthermore, the strain could be clearly distinguished from its closely related type strains by the combination of DNA–DNA hybridization results and some phenotypic characteristics. Meanwhile, strain NEAU-HV9 displayed herbicidal activity. Therefore, strain NEAU-HV9 represents a novel species within the genus , for which the name sp. nov. is proposed, with strain NEAU-HV9 (=CCTCC AA 2019088=DSM 113364) as the type strain.

Funding
This study was supported by the:
  • National Key Research and Development Program of China (Award 2022YFD1700205)
  • Innovative Research Group Project of the National Natural Science Foundation of China (Award TD2022C002)
    • Principle Award Recipient: WenshengXiang
  • Key Programme (Award U22A20483)
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2024-02-05
2024-02-21
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