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Characterization and Incidence of the First Member of the Genus Mitovirus Identified in the Phytopathogenic Species Fusarium oxysporum

AuthorsTorres-Trenas, Almudena; Pérez-Artés, Encarnación
KeywordsFusarium oxysporum
Mycovirus dispersion
Viral RNA
Issue Date3-Mar-2020
PublisherMultidisciplinary Digital Publishing Institute
CitationViruses 12(3): 279 (2020)
AbstractA novel mycovirus named Fusarium oxysporum f. sp. dianthi mitovirus 1 (FodMV1) has been identified infecting a strain of Fusarium oxysporum f. sp. dianthi from Colombia. The genome of FodMV1 is 2313 nt long, and comprises a 172-nt 5’-UTR, a 2025-nt single ORF encoding an RdRp of 675 amino acid residues, and a 113-nt 3´-UTR. Homology BlastX searches identifies FodMV1 as a novel member of the genus Mitovirus in the family Narnaviridae. As the rest of mitoviruses, the genome of FodMV1 presents a high percentage of A+U (58.8%) and contains a number of UGA codons that encode the amino acid tryptophan rather than acting as stop codons as in the universal genetic code. Another common feature with other mitoviruses is that the 5′- and 3′-UTR regions of FodMV1 can be folded into potentially stable stem-loop structures. Result from phylogenetic analysis place FodMV1 in a different clade than the rest of mitoviruses described in other Fusarium spp. Incidence of FodMV1-infections in the collection of F. oxysporum f. sp. dianthi isolates analyzed is relatively high. Of particular interest is the fact that FodMV1 has been detected infecting isolates from two geographical areas as distant as Spain and Colombia.
Description© 2020 by the authors.
Publisher version (URL)https://doi.org/10.3390/v12030279
Appears in Collections:(IAS) Artículos
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