Higher order taxa
Virus; ssRNA positive-strand viruses, no DNA stage; Potyviridae
Potyvirus, Bymovirus, Ipomovirus, Macluravirus, Rymovirus, Tritimovirus
Description and Significance
The Potyviridae family is one of the largest and economically most important families of plant viruses, due to their effects on crops worldwide. Members of the family are characterized by properties such as vector transmission and particle morphology. The name Potyviridae comes from the "Potato virus Y group." (sources: Götz et al., Janssen et al., ICTVdB)
The Potyviridae genome consists of either one molecule or two segments of linear positive-sense single stranded RNA. The complete genome is 8500-10000 nucleotides long. 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 200-300 nm in length. Virions have a width of 12-15 nm. (source: ICTVdB)
Reproduction Cycle of a Potyvirus in a Host Cell
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. (sources: Götz et al., Janssen et al.)
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.
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.