Oryzavirus
Oryzavirus is a genus of viruses, in the family Reoviridae, in the subfamily Spinareovirinae. There are currently only two species in this genus including the type species Rice ragged stunt virus. Diseases associated with this genus include: RRSV: stunting, enations on veins of leaves and leaf sheaths, ragged leaves, flower suppression; FDV: Fiji disease, with severe stunting, deformation and death.
Taxonomy
Group: dsRNAStructure
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. The genome codes for 12 proteins.Genus | Structure | Symmetry | Capsid | Genomic arrangement | Genomic segmentation |
Oryzavirus | Icosahedral | T=13, T=2 | 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 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.The virus is transmitted via a vector. Transmission routes are vector.
Genus | Host details | Tissue tropism | Entry details | Release details | Replication site | Assembly site | Transmission |
Oryzavirus | Plants: graminae, Oryza sativa; planthoppers | - | Viral movement; mechanical inoculation | Cell death | Cytoplasm | Cytoplasm | Delphacid planthoppers |