''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.
Since Dmitri Ivanovsky's 1 ...
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 13 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:
* 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
Alfalfa () (''Medicago sativa''), also called lucerne, is a perennial flowering plant in the legume family Fabaceae. It is cultivated as an important forage crop in many countries around the world. It is used for grazing, hay, and silage, as we ...
''
** ''
Arachis pintoi virus
''Arachis'' is a genus of about 70 species of annual and perennial flowering plants in the family (Fabaceae), native to South America, and was recently assigned to the informal monophyletic ''Pterocarpus'' clade of the Dalbergieae. At least one ...
''
** ''
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.
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