Tymovirus


Tymovirus is a genus of viruses in the order Tymovirales, in the family Tymoviridae. Plants serve as natural hosts. There are 30 species in this genus.

Taxonomy

The genus contains the following species, listed by scientific name and followed by the exemplar virus of the species:Tymovirus abelmoschi, Okra mosaic virusTymovirus anagyris, Anagyris vein yellowing virusTymovirus arachidis, Peanut yellow mosaic virusTymovirus belladonnae, Belladonna mottle virusTymovirus brassicae, Turnip yellow mosaic virusTymovirus calopogonii, Calopogonium yellow vein virusTymovirus chayotis, Chayote mosaic virusTymovirus chiltepini, Chiltepin yellow mosaic virusTymovirus clitoriae, Clitoria yellow vein virusTymovirus cucumis, Wild cucumber mosaic virusTymovirus desmodii, Desmodium yellow mottle virusTymovirus dulcamarae, Dulcamara mottle virusTymovirus erysimi, Erysimum latent virusTymovirus kennedyae, Kennedya yellow mosaic virusTymovirus latandigenum, Andean potato latent virusTymovirus lycopersici, Tomato blistering mosaic tymovirusTymovirus melongenae, Eggplant mosaic virusTymovirus melonis, Melon rugose mosaic virusTymovirus mosandigenum, Andean potato mild mosaic virusTymovirus naranjillae, Naranjilla chlorotic mosaic virusTymovirus nemesiae, Nemesia ring necrosis virusTymovirus ononis, Ononis yellow mosaic virusTymovirus passiflorae, Passion fruit yellow mosaic virusTymovirus petuniae, Petunia vein banding virusTymovirus physalis, Physalis mottle virusTymovirus plantagonis, Plantago mottle virusTymovirus quitoense, Naranjilla mild mosaic virusTymovirus scrophulariae, Scrophularia mottle virusTymovirus theobromatis, Cacao yellow mosaic virusTymovirus voandzeiae, Voandzeia necrotic mosaic virus

Structure

Viruses in Tymovirus are non-enveloped, with icosahedral and isometric geometries, and T=3 symmetry. The diameter is around 30 nm. Genomes are linear, around 6.3kb in length.
GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
TymovirusIcosahedralT=3Non-envelopedLinearMonopartite

Life cycle

Viral replication is cytoplasmic and 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 is the method of transcription. Translation takes place by leaky scanning. The virus exits the host cell by monopartite non-tubule guided viral movement. Plants serve as the natural host. The virus is transmitted via a vector. Transmission routes are vector and mechanical.
GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
TymovirusPlants-Viral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical: beetles; sap