Departamento de Microbiologia, Instituto de Biotecnologia Aplicada à Agropecuária Universidade Federal de Viçosa, Viçosa, MG, CEP: 36570-900, Brazil.
Departamento de Fitossanidade, Universidade Federal de Pelotas, Pelotas, RS, CEP: 96010900, Brazil.
Arch Virol. 2021 Dec;166(12):3455-3459. doi: 10.1007/s00705-021-05242-4. Epub 2021 Sep 25.
A novel mycovirus was identified infecting the phytopathogenic fungus Microdochium albescens. The characterized dsRNA segment, corresponding to the replicative intermediate of the mitovirus genome, is 2,562 base pairs (bp) in length, with an A+U content of 62.3%. A single open reading frame (ORF) was identified, encoding a putative RNA-dependent RNA polymerase (RdRp) of 706 amino acids. Phylogenetic analysis showed that this virus should be classified as a member of a new species in the genus Mitovirus, family Mitoviridae, for which we propose the name "Mitovirus gaucho". This is the first report of a mycovirus infecting the phytopathogenic fungus M. albescens, the causative agent of leaf scald on rice in Brazil.
一种新的真菌病毒被鉴定为感染植物病原菌小麦网腥黑粉菌。该特征性的双链 RNA 片段，对应于杆状病毒基因组的复制中间体，长 2562 个碱基对（bp），A+U 含量为 62.3%。鉴定出一个单一的开放阅读框（ORF），编码一个推定的 RNA 依赖性 RNA 聚合酶（RdRp），由 706 个氨基酸组成。系统发育分析表明，该病毒应归类为杆状病毒科杆状病毒属的一个新种，我们将其命名为“Mitovirus gaucho”。这是第一个报道感染植物病原菌小麦网腥黑粉菌的真菌病毒，该菌是巴西水稻叶枯病的病原体。
