Potyviridae

Baltimore Classification

Higher order taxa

Virus; ssRNA positive-strand viruses, no DNA stage; Potyviridae

Genera

Potyvirus, Bymovirus, Ipomovirus, Macluravirus, Rymovirus, Tritimovirus

Genome Structure

The Potyviridae genome consist of either one molecule or two segments of linear positive-sense single stranded RNA. The complete genome is 8500-10000 nucleotides in length. The 3'-terminus has a poly (A) tract. The 5'-terminus has a genome-linked protein (VPg). (source: ICTVdB)

Virion Structure of a Potyvirus

Potyviridae virions consist of a non-enveloped capsid. The capsid is elongated, filamentous, and exhibits helical symmetry. The size of virions in the family vary, but are either 680-900nm, 500-600nm, or 200-300nm in length. Virions have a width of 12-15nm. (source: ICTVdB)

Viral Ecology & Pathology

Potyviruses infect plants, causing severe economic damage to crops worldwide. The genera are defined by their transmission vector: Potyviruses and Macluraviruses are aphid-borne; Bymoviruses are transmitted by plasmodiphorids; Rymoviruses and Tritimoviruses are transmitted by mites; and Ipomoviruses are transmitted by whiteflies.

References

Fereres et al. "Aphid Attraction and Preference for Soybean and Pepper Plants Infected with Potyviridae." Annals of the Entomological Society of America 92.4 (1999): 542-548.

Götz et al. "Molecular analyses of the coat protein region of different viruses on Poaceae belonging to the Potyviridae." Agronomie 15.7-8 (1995): 491-494.

ICTVdB - The Universal Virus Database, version 4. http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/

Janssen et al. "Absence of a coding region for the helper component-proteinase in the genome of cucumber vein yellowing virus, a whitefly-transmitted member of the Potyviridae." Archives of Virology 150.7 (2005): 1439-1447.