Allexivirus

Allexivirus is a genus of viruses in the order Tymovirales, in the family Alphaflexiviridae. Shallot, onion, and garlic serve as natural hosts. There are 13 species in this genus, seven of which are assigned to a subgenus. Diseases associated with this genus include: mosaic and ringspot symptoms.[1][2]

Allexivirus
Virus classification Edit this classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Alsuviricetes
Order: Tymovirales
Family: Alphaflexiviridae
Genus: Allexivirus
Species

See text

Taxonomy

The following species are assigned to the genus:[2]

  • Subgenus: Acarallexivirus
    • Garlic virus A
    • Garlic virus B
    • Garlic virus C
    • Garlic virus D
    • Garlic virus E
    • Garlic virus X
    • Shallot virus X
  • Species not assigned to a subgenus:
    • Alfalfa virus S
    • Arachis pintoi virus
    • Blackberry virus E
    • Garlic mite-borne filamentous virus
    • Senna yellow mosaic virus
    • Vanilla latent virus

Structure

Viruses in Allexivirus are non-enveloped, with flexuous and filamentous geometries. The diameter is around 12 nm, with a length of 800 nm. Genomes are linear, around 9kb in length. The genome codes for 6 proteins.[1]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
AllexivirusFilamentousNon-envelopedLinearMonopartite

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 tripartite non-tubule guided viral movement. Shallot, onion, and garlic serve as the natural host. The virus is transmitted via a vector (mite). Transmission routes are vector and mechanical.[1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
AllexivirusPlants: Shallot; plants: onion; plants: garlicNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMites

References
  1. "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 15 May 2021.
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