''Fabavirus'' is a genus of

plant virus Plant viruses are viruses that have the potential to 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 pathoge ...

es (

plant pathogens Plant diseases are diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). Organisms that cause infectious disease include fungi, oomycetes, bacteria, viruses, viroids, virus-like orga ...

) 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 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 bact ...

'', 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. The subfamily contains four genera. Taxo ...

''. Plants serve as natural hosts. There are 13 species in this genus.

Taxonomy

The genus contains the following species,listed by scientific name and followed by the exemplar virus of the species: * ''Fabavirus alphaviciae'', Broad bean wilt virus 1 * ''Fabavirus avii'', Cherry virus F * ''Fabavirus betaviciae'', Broad bean wilt virus 2 * ''Fabavirus betavitis'', Grapevine secovirus * ''Fabavirus cirsii'', Cirsium virus A * ''Fabavirus cucurbitaceae'', Cucurbit mild mosaic virus * ''Fabavirus gentianae'', Gentian mosaic virus * ''Fabavirus gynostemmae'', Gynostemma pentaphyllum secovirus * ''Fabavirus lamii'', Lamium mild mosaic virus * ''Fabavirus persicae'', Peach leaf pitting-associated virus A * ''Fabavirus pruni'', Prunus virus F * ''Fabavirus vitis'', Grapevine fabavirus * ''Fabavirus yuccae'', Yucca gloriosa secovirus

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. Vari ...

'').

References

External links