Tobravirus
Genus of viruses
From Wikipedia, the free encyclopedia
Tobravirus is a genus of viruses, in the family Virgaviridae.[1] Plants serve as natural hosts. There are three species in this genus. Diseases associated with this genus include: SBWMV: green and yellow mosaic.[1][2][3]
| Tobravirus | |
|---|---|
Virus classification  | |
| (unranked): | Virus |
| Realm: | Riboviria |
| Kingdom: | Orthornavirae |
| Phylum: | Kitrinoviricota |
| Class: | Alsuviricetes |
| Order: | Martellivirales |
| Family: | Virgaviridae |
| Genus: | Tobravirus |
Taxonomy
The following species are assigned to the genus, listed by scientific name and followed by their common names:[3]
- Tobravirus capsici, Pepper ringspot virus
- Tobravirus pisi, Pea early-browning virus
- Tobravirus tabaci, Tobacco rattle virus
Structure
Viruses in the genus Tobravirus are non-enveloped, with rod-shaped geometries, and helical symmetry. The diameter is around 22 nm, with two lengths: 46-115 nm and 180–215 nm.[1][2] Genomes are linear and segmented, bipartite, positive-sense, single-stranded RNA around 26.84.5kb in total length (8600–11300 nucleotides for each length).[1][2][4]
| Genus | Structure | Symmetry | Capsid | Genomic arrangement | Genomic segmentation |
|---|---|---|---|---|---|
| Tobravirus | Rod-shaped | Helical | Non-enveloped | Linear | Segmented |
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. Translation takes place by suppression of termination. 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 (mechanical nematodes trichodorus and paratrichodorus). Transmission routes are vector and mechanical.[1][2]
| Genus | Host details | Tissue tropism | Entry details | Release details | Replication site | Assembly site | Transmission |
|---|---|---|---|---|---|---|---|
| Tobravirus | Plants | None | Unknown | Viral movement | Cytoplasm | Cytoplasm | Mechanical inoculation: nematodes |