''Allexivirus'' is a genus of

viruses A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Viruses are found in almo ...

in the order ''

Tymovirales ''Tymovirales'' is an order of viruses with five families. The group consists of viruses which have positive-sense, single-stranded RNA genomes. Their genetic material is protected by a special coat protein. Description Tymoviruses are mainly ...

'', in the family ''

Alphaflexiviridae ''Alphaflexiviridae'' is a family of viruses in the order ''Tymovirales''. Plants and fungi serve as natural hosts. There are 65 species in this family, assigned to six genera. Diseases associated with this family include: mosaic and ringspot sy ...

''. Shallot, onion, and garlic serve as natural hosts. There are 14 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 their common names: * 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 sennae'', Senna 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.

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.

References

External links

Viralzone: ''Allexivirus''

ICTV
{{Taxonbar, from=Q18814785 Alphaflexiviridae Virus genera