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.

Structure

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.

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.

Taxonomy

The genus contains the following species:Oryzavirus echinochloae, Echinochloa ragged stunt virusOryzavirus oryzae, Rice ragged stunt virus