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Oryzavirus

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Oryzavirus
Virus classification
Group:
Group III (dsRNA)
Family:
Reoviridae
Subfamily:
Spinareovirinae
Genus:
Oryzavirus
Type Species

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.[1][2]

Taxonomy

Group: dsRNA

Order: Unassigned
  • Family: Reoviridae
    • Sub-Family: Spinareovirinae
      • Genus: Oryzavirus

[2]

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 (total size around 26 kb). The genome codes for 12 proteins.[1]

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 (delphacid planthoppers). Transmission routes are vector.[1]

Genus Host Details Tissue Tropism Entry Details Release Details Replication Site Assembly Site Transmission
Oryzavirus Plants: graminae, Oryza sativa; planthoppers None Viral movement; mechanical inoculation Cell death Cytoplasm Cytoplasm Delphacid planthoppers

References

  1. ^ a b c "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. ^ a b ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015.
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