1887

Abstract

A novel actinobacterium, designated strain CWNU-1, was isolated from the rhizospheric soil of D. Don and examined using a polyphasic taxonomic approach. The organism developed pale blue aerial mycelia that was simply branched and terminated in open or closed coils of three or more volutions on International Project 3 agar. Spores were ellipsoidal to cylindrical with wrinkled surfaces. The strain showed high 16S rRNA gene sequence similarity to NBRC 13192 (98.8 %), NBRC 13354 (98.7 %) and JCM 9920 (98.6 %). The phylogenetic result based on 16S rRNA gene and genome sequences clearly demonstrated that strain CWNU-1 formed an independent phylogenetic lineage. On the basis of orthologous average nucleotide identity, CWNU-1 was most closely related to NBRC 13601 with 79.3 % identity. The results of the digital DNA–DNA hybridization analysis also indicated low levels of relatedness with other species, as the highest value was observed with NBRC 13601 (25.3 %). With reference to phenotypic characteristics, phylogenetic data, orthologous average nucleotide identity and digital DNA–DNA hybridization results, strain CWNU-1 was readily distinguished from its most closely related strains and classified as representing a novel species, for which the name sp. nov. is proposed. The type strain is CWNU-1 (=CGMCC 4.7758=MCCC 1K07402=JCM 35391).

Funding
This study was supported by the:
  • Fundamental Research Funds of China West Normal University (Award 20A021)
    • Principle Award Recipient: XiaoJiang
  • Fundamental Research Funds of China West Normal University (Award 19B034)
    • Principle Award Recipient: ZhaoxuMa
  • Fundamental Research Funds of China West Normal University (Award 18Q044)
    • Principle Award Recipient: ZhaoxuMa
  • Natural Science Foundation of Sichuan Province (Award 2022NSFSC1661)
    • Principle Award Recipient: ZhaoxuMa
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2024-05-02
2024-05-18
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