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What is this?
Picture contributed by Steve Whitham from
the ICTVdB Virus Descriptions, © 2002 ICTV.
Tobravirus or the Tobacco rattle virus group of plant viruses is on taxonomic level of genus (not yet assigned to a family). The viruses are transmitted by a vector (transmitted by mechanical inoculation, grafting, seed, nematode, or trichordoriade) but not transmitted by contact between plants. The virus spreads in the Eurasian region and the North, Central and South American regions.
The virions are not enveloped and are of more than one type of particle different in size and range. Nucleocapsids are rod-shaped, usually straight, and many strains produce small amounts of shorter particles. The virions contain two segments of linear positive-sense single stranded RNA. Genome is divided among 2 different particle types.
See: www.ictvdb.rothamsted.ac.uk/Ictv/
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