The Big Picture Book of Viruses: Potyviridae

Taxonomy: Taxonomic structure of the family. Species: Potyvirus; Rymovirus; Bymovirus; Tentative species in the genus Potyvirus. Unclassified viruses: whitefly transmitted: sweet potato mild mottle virus; sweet potato yellow dwarf virus; aphid transmitted: Maclura mosaic virus; narcissus latent virus.

Host: Virus infects plants.

Genome: RNA. Single stranded. Linear; genomic nucleic acid positive sense. Genome monopartite, or bipartite (in some species). Total genome 8500-10000 nucleotides long. 5' terminus has a genome-linked protein (VPg). 3' terminus has a poly (A) tract. Genome divided among more than one type of particle; that is two different types.

Morphology: Virions not enveloped. Virions one type of particle only, or more than one type of particle; different in size and range. Capsids filamentous; nucleocapsids usually flexuous; nucleocapsids with no clear modal length; nucleocapsids 680-900 nm long, or 500-600 nm long; nucleocapsids 200-300 nm; nucleocapsids 12-15 nm in diameter. Symmetry helical. Pitch of helix 3.4 nm.

(Note: for more information about the taxonomy and structure of this virus, see the ICTV database below.)

More Information:
Taxonomy: ICTV Data
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Tutorials: None Available

Potyviridae Images:
Genus EM Images Example Virus Name Description of Image
  • Potyvirus
  • N/A
    potato virus Y
    potyvirus an example virus image from the ICTV
  • Rymovirus
  • N/A
    ryegrass mosaic virus
  • Bymovirus
    barley yellow mosaic virus
    bymovirus an example virus image from the ICTV
    barley yellow mosaic virus Colorized-enhanced versions of EM photograph by Geoge Musil, Florida; kept at website of the Institute for Molecular Virology - Wisconsin.

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