Fabavirus is a genus of plant viruses (plant pathogens) in the order Picornavirales, in the family Secoviridae, in the subfamily Comovirinae. Plants serve as natural hosts. There are 18 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 camphorae, Camphor tree fabavirus 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 multiflorum, Many-flowered stoneseed fabavirus Fabavirus persicae, Peach leaf pitting-associated virus A Fabavirus phipiperis, Black pepper virus F Fabavirus pruni, Prunus virus F Fabavirus reaumuriae, Reaumuria songarica fabavirus Fabavirus squamellariae, Squamellaria imberbis fabavirus 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.
Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentationFabavirusIcosahedralPseudo T=3Non-envelopedLinearSegmented
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.
Genus Host details Tissue tropism Entry details Release details Replication site Assembly site TransmissionFabavirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: aphids
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 Picornavirales in 2008, and reached its current taxonomic status in 2009. There are seven species.ICTV Virus Taxonomy: 2013 Release. Fabavirus The genus is named after the broad bean (Vicia faba).
See also
References
External links Viralzone: Fabavirus ICTV