Bromoviridae


Bromoviridae is a family of viruses. Plants serve as natural hosts. There are currently 36 species in this family, divided among 6 genera.

Taxonomy

Group: ssRNA

Structure

Viruses in the family Bromoviridae are non-enveloped, with icosahedral and bacilliform geometries. The diameter is around 26-35 nm. Genomes are linear and segmented, tripartite.
GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
IlarvirusIcosahedralT=3Non-envelopedLinearSegmented
AnulavirusIcosahedralT=3Non-envelopedLinearSegmented
BromovirusIcosahedralT=3Non-envelopedLinearSegmented
OleavirusIcosahedralT=1Non-envelopedLinearSegmented
AlfamovirusVariesNon-envelopedLinearSegmented
CucumovirusIcosahedralT=3Non-envelopedLinearSegmented

Life cycle

Viral replication is cytoplasmic, and is lysogenic. 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, using the internal initiation model of subgenomic rna transcription is the method of transcription. The virus exits the host cell by tubule-guided viral movement.
Plants serve as the natural host. Transmission routes are mechanical and contact.
GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
IlarvirusPlants-Viral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: insects; contact
AnulavirusPlants-Viral movement; mechanical inoculationViral movementCytoplasmCytoplasmUnknown
BromovirusPlants-Viral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: insects; contact
OleavirusPlants-Viral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: insects; contact
AlfamovirusPlants-Viral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: insects
CucumovirusPlants-Viral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: insects; contact