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<p>Here, we characterized a novel mycovirus, Colletotrichum gloeosporioides narnavirus 1 (CgNV1), isolated from <i>Colletotrichum gloeosporioides</i> strain T-19, a fungal pathogen responsible for anthracnose in various crops. The CgNV1 genome consists of a 3,628-nucleotide-long positive-sense single-stranded RNA (+ ssRNA) with a GC content of 51.93% and has a single open reading frame (ORF) encoding an RNA-dependent RNA polymerase (RdRp) of 1,155 amino acids (132.2 kDa). BLASTp analysis indicated that the CgNV1 RdRp shares the highest sequence identity (56.77%) with that of Erysiphe necator narnavirus 15. Phylogenetic analysis confirmed that CgNV1 is a distinct member of the family <i>Narnaviridae</i>. To our knowledge, this is the first report of a narnavirus infecting <i>C. gloeosporioides</i>, expanding the known diversity of mycoviruses associated with this phytopathogenic fungus.</p>

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Molecular characterization of a novel narnavirus from the plant-pathogenic fungus Colletotrichum gloeosporioides

  • 期刊论文

  • 发表日期：

    2025年8月25日

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  • Peiping Luo,
  • Xuetuan Lin,
  • Siyu Zhou,
  • Daipeng Chen,
  • Yinhui Sun,
  • Li Zheng

摘要

Here, we characterized a novel mycovirus, Colletotrichum gloeosporioides narnavirus 1 (CgNV1), isolated from Colletotrichum gloeosporioides strain T-19, a fungal pathogen responsible for anthracnose in various crops. The CgNV1 genome consists of a 3,628-nucleotide-long positive-sense single-stranded RNA (+ ssRNA) with a GC content of 51.93% and has a single open reading frame (ORF) encoding an RNA-dependent RNA polymerase (RdRp) of 1,155 amino acids (132.2 kDa). BLASTp analysis indicated that the CgNV1 RdRp shares the highest sequence identity (56.77%) with that of Erysiphe necator narnavirus 15. Phylogenetic analysis confirmed that CgNV1 is a distinct member of the family Narnaviridae. To our knowledge, this is the first report of a narnavirus infecting C. gloeosporioides, expanding the known diversity of mycoviruses associated with this phytopathogenic fungus.