''Fabavirus'' is a genus of

plant virus Plant viruses are viruses that affect plants. Like all other viruses, plant viruses are obligate intracellular parasites that do not have the molecular machinery to replicate without a host. Plant viruses can be pathogenic to higher plants. ...

es ( plant pathogens) in the order ''

Picornavirales ''Picornavirales'' is an order of viruses with vertebrate, invertebrate, protist and plant hosts. The name has a dual etymology. First, ''picorna-'' is an acronym for poliovirus, insensitivity to ether, coxsackievirus, orphan virus, rhinovirus, ...

'', in the family ''

Secoviridae ''Secoviridae'' is a family of viruses in the order ''Picornavirales''. Plants serve as natural hosts. There are 8 genera and 86 species in this family, one of which is unassigned to a genus. The family was created in 2009 with the grouping of f ...

'', in the subfamily ''

Comovirinae ''Comovirinae'' is a subfamily of viruses in the order ''Picornavirales'', in the family ''Secoviridae''; its genera were formerly classified in the family ''Comoviridae''. Plants serve as natural hosts. There are 62 species in this subfamily, a ...

''. Plants serve as natural hosts. There are seven species in this genus.

Taxonomy

The genus contains the following species: *'' 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.

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.

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 ''

'' in 2008, and reached its current taxonomic status in 2009. There are seven species.ICTV Virus Taxonomy: 2013 Release. Fabavirus
/ref> The genus is named after the broad bean (''

Vicia faba ''Vicia faba'', commonly known as the broad bean, fava bean, or faba bean, is a species of vetch, a flowering plant in the pea and bean family Fabaceae. It is widely cultivated as a crop for human consumption, and also as a cover crop. Varieti ...

'').

References

External links