Allexivirus is a genus of viruses in the order Tymovirales, in the family Alphaflexiviridae. Shallot, onion, and garlic serve as natural hosts. There are 15 species in this genus, seven of which are assigned to a subgenus. Diseases associated with this genus include: mosaic and ringspot symptoms.
Taxonomy The following species are assigned to the genus, listed by scientific name and followed by the exemplar virus of the species:
Subgenus: Acarallexivirus Allexivirus alphallii, Garlic virus A Allexivirus betallii, Garlic virus B Allexivirus chiallii, Garlic virus C Allexivirus deltallii, Garlic virus D Allexivirus ecsallii, Garlic virus X Allexivirus ecsascalonicum, Shallot virus X Allexivirus epsalii, Garlic virus E Species not assigned to a subgenus: Allexivirus epsilonrubi, Blackberry virus E Allexivirus filumallii, Garlic mite-borne filamentous virus Allexivirus latensvanillae, Vanilla latent virus Allexivirus pintoi, Arachis pintoi virus Allexivirus rehmanniae, Rehmannia allexivirus Allexivirus sauroandrogyni, Sauropus androgynus virus Allexivirus sennae, Senna severe yellow mosaic virus Allexivirus sigmamedicagonis, Alfalfa virus S
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.
Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentationAllexivirusFilamentousNon-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.
Genus Host details Tissue tropism Entry details Release details Replication site Assembly site TransmissionAllexivirusPlants: Shallot; plants: onion; plants: garlicNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMites
References
External links
Viralzone: Allexivirus ICTV