ArticleVirology2026
Grapevine-associated picorna-like virus, an unusual virus identified in wine grapes (Vitis vinifera L.).
Article in Virology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
A new picorna-like virus was identified in grapevines from a 21-year-old 'Tempanillo' block in eastern Oregon exhibiting leaf chlorosis and interveinal reddening, through the high-throughput sequencing (HTS) of the total RNA. This new virus was named grapevine-associated picorna-like virus (GaPLV). GaPLV has a monopartite, positive-sense, single-stranded RNA genome of 9021-nt, with a single open reading frame encoding a polyprotein that encompasses an RNA dependent RNA polymerase (RdRP), a helicase, a chymotrypsin-like protease, and three capsid proteins. The arrangement of these conserved domains in the polyprotein is so far unique among picorna-like viruses, with two structural (capsid) proteins in the N-terminal region, upstream of all other conserved domains, and one structural (capsid) domain close to the C-terminus of the polyprotein, downstream of the RdRP. In phylogenetic analysis, RdRP of GaPLV grouped inside the order Picornavirales, but outside of the known families of picorna-like viruses, at the base of the clade that includes Iflaviridae and Polycipivirdae. The presence of GaPLV in the original 'Tempranillo' samples was confirmed by RT-PCR amplifications and Sanger sequencing. Virus surveys conducted in 2023 and 2024 from five commercial vineyards in southwestern Idaho and eastern Oregon revealed GaPLV presence in six wine grape cultivars.
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