Oryzavirus
| Oryzavirus | |
|---|---|
Virus classification  | |
| (unranked): | Virus |
| Realm: | Riboviria |
| Kingdom: | Orthornavirae |
| Phylum: | Duplornaviricota |
| Class: | Resentoviricetes |
| Order: | Reovirales |
| Family: | Spinareoviridae |
| Genus: | Oryzavirus |
Oryzavirus is a genus of double-stranded RNA viruses in the order Reovirales and family Spinareoviridae. Member viruses infect plants and are transmitted by planthoppers. Diseases associated with this genus include: rice stunting, enations on veins of leaves and leaf sheaths, ragged leaves, and flower suppression. There are two species in this genus.[1][2]
Structure
[edit]Viruses in Oryzavirus are non-enveloped, with icosahedral and Round geometries, and T=13, T=2 symmetry. The diameter is around 70 nm. Genomes are linear and segmented, segments are around 1162 to 3849 base pairs (total size around 26 kb). The genome codes for 12 proteins.[1]
Life cycle
[edit]Viral replication is cytoplasmic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the double-stranded RNA virus replication model. Double-stranded RNA virus transcription is the method of transcription. The virus exits the host cell by monopartite non-tubule guided viral movement.[1] The virus is transmitted via a vector (delphacid planthoppers). Transmission routes are vector.[1]
Taxonomy
[edit]The genus contains the following species:[2]
- Oryzavirus echinochloae, Echinochloa ragged stunt virus
- Oryzavirus oryzae, Rice ragged stunt virus
References
[edit]- 1 2 3 4 "Viral Zone". ExPASy. Retrieved 15 June 2015.
- 1 2 "Virus Taxonomy: 2024 Release". International Committee on Taxonomy of Viruses. Retrieved 22 April 2025.