Fabavirus

Fabavirus is a genus of plant viruses (plant pathogens) in the order Picornavirales, in the family Secoviridae, in the subfamily Comovirinae. Plants serve as natural hosts. There are seven species in this genus.[1][2][3]

Fabavirus
Virus classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Pisuviricota
Class: Pisoniviricetes
Order: Picornavirales
Family: Secoviridae
Subfamily: Comovirinae
Genus: Fabavirus

Taxonomy

The genus contains the following species:[2]

  • Broad bean wilt virus 1
  • Broad bean wilt virus 2
  • Cucurbit mild mosaic virus
  • Gentian mosaic virus
  • Grapevine fabavirus
  • Lamium mild mosaic virus
  • Prunus virus F

Structure

Viruses in Fabavirus are non-enveloped, with icosahedral geometries, and T=pseudo3 symmetry. The diameter is around 28-30 nm. Genomes are linear and segmented, bipartite, around 23.4kb in length.[1]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
FabavirusIcosahedralPseudo T=3Non-envelopedLinearSegmented

Life cycle

Viral replication is cytoplasmic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription is the method of transcription. The virus exits the host cell by tubule-guided viral movement. Plants serve as the natural host. The virus is transmitted via a vector (aphid). Transmission routes are vector and mechanical.[1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
FabavirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: aphids

History

Proposed in 1987, as the Fabavirus group, it was originally unassigned but given genus status in 1993 as a member of the Comoviridae, of the Picornavirales in 2008, and reached its current taxonomic status in 2009. There are seven species.[4] The genus is named after the broad bean (Vicia faba).[3]

See also
  • King, Andrew M. Q.; et al., eds. (2012). Virus taxonomy : classification and nomenclature of viruses : ninth report of the International Committee on Taxonomy of Viruses. London: Academic Press. p. 926. ISBN 978-0123846846. Retrieved 9 December 2014.

References
  1. "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 21 May 2021.
  3. V. Lisa; G. Boccardo (1996). "Fabaviruses". In Murant, A.F.; Harrison, B.D. (eds.). The Plant Viruses Polyhedral Virions and Bipartite RNA Genomes. Boston, MA: Springer US. pp. 229–250. doi:10.1007/978-1-4899-1772-0_9. ISBN 978-1-4899-1772-0.
  4. ICTV Virus Taxonomy: 2013 Release. Fabavirus
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