Fijivirus
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[edit] Fiji Disease Virus
Fiji Disease Virus (FDV) belongs to the reoviridae family and infects plants. It is one of only three plant viruses in the reovirdae family.
[edit] Structure
The virus is between 65-70 nm in diameter. FDV is not enveloped but has a nucleocapsid. The capsid has two layers and is icosohedral. The two known cell surface proteins are A type and B type spikes. The capsid appears round.
[edit] Genome
As FDV is a reovirus it's genome is also made of dsRNA. The genome is linear and made up of ten segments. The genome consists of 27000-30500 base pairs. There are at least six structural proteins coded for in the genome.Replication occurs in the host cell cytoplasm or cytoplasmic viroplasma.
[edit] Transmission
The virus is transmitted by the vector Delphacidae which are plant hoppers. The disease is mostly found in Australia because this is the natural habitat of the plant hoppers. It has also been detected in the Philippines. The virus infects the phloem tissues of their Gramineae hosts. Replication can occur in both the host and vector. The result of infection in plants is the development of tumours.
[edit] References
ICTV Report [link accessed 2007-02-27]
Description of plant viruses; Notes on Genus: Fijivirus [link accessed 2007-02-27]
