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<p>Citrus is one of the most widely cultivated and economically important fruit crops globally. However, the postharvest pathogen <i>Penicillium digitatum</i> causes green mold decay in citrus fruits, leading to significant economic losses. Here, a novel mycovirus, Penicillium digitatum mitovirus 1 (PdMV1), was isolated from the phytopathogenic fungus <i>P. digitatum</i>, and its molecular characteristics were determined. PdMV1 has a genome that is 2,517 nt in length with an A+U content of 62.7%. The single ORF encodes a putative RNA-dependent RNA polymerase (RdRp) of 734 amino acids with a molecular mass of 84.116 kDa. A BLASTp comparison of the RdRp sequence showed the highest similarity (65.01% identity) to that of Sclerotinia sclerotiorum mitovirus 32. Phylogenetic analysis revealed that PdMV1 is a new member of the genus <i>Unuamitovirus</i> within the family <i>Mitoviridae</i>. To the best of our knowledge, this is the first report of a mitovirus infecting <i>Penicillium digitatum</i>.</p>

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Complete genome analysis of a novel mitovirus in the phytopathogenic fungus Penicillium digitatum

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • Zhimin Tang,
  • Yunhui He,
  • Ya Yang,
  • Xiaoping Zhang,
  • Rui Zhou,
  • Kang Zhou

摘要

Citrus is one of the most widely cultivated and economically important fruit crops globally. However, the postharvest pathogen Penicillium digitatum causes green mold decay in citrus fruits, leading to significant economic losses. Here, a novel mycovirus, Penicillium digitatum mitovirus 1 (PdMV1), was isolated from the phytopathogenic fungus P. digitatum, and its molecular characteristics were determined. PdMV1 has a genome that is 2,517 nt in length with an A+U content of 62.7%. The single ORF encodes a putative RNA-dependent RNA polymerase (RdRp) of 734 amino acids with a molecular mass of 84.116 kDa. A BLASTp comparison of the RdRp sequence showed the highest similarity (65.01% identity) to that of Sclerotinia sclerotiorum mitovirus 32. Phylogenetic analysis revealed that PdMV1 is a new member of the genus Unuamitovirus within the family Mitoviridae. To the best of our knowledge, this is the first report of a mitovirus infecting Penicillium digitatum.