| Tobacco ringspot virus (TRSV) | |
|---|---|
| Scientific classification | |
| Family: | Comoviridae |
| Genus: | Nepovirus |
| Species: | Tobacco ringspot virus |
Tobacco ringspot virus (TRSV) is a plant pathogenic virus in the plant virus family Comoviridae. It is the type species of the Comoviridae Genus Nepovirus. Nepoviruses are be transmitted between plants by nematodes. TRSV is also easily transmitted by sap inoculation and transmission in seeds has been reported [1]
TRSV was observed for the first time in tobacco fields in Virginia and described in 1927 [2]. It is an isometric particle [3] with a bipartite RNA genome. The virus has a wide host range [4] that includes field grown crops, ornamentals and weeds. Its name comes from the fact that its most common symptom is chlorotic ringspots on the leaves of infected plants [5].
A. B. C.
Symptoms and virus inclusions of Tobacco ringspot nepovirus in the host Zamia furfuracea, the Cardboard Cycad. [6] A. The first symptoms seen were chlorotic ringspots. With time they become necrotic. B. There are two types of inclusions found in leaf strips stained with Azure A (nucleic acid stain) [7], one is vacuolate (Vac Inc) and the other more crystalloid (Cyst Inc - darker spots). C. Vacuolate inclusions only.
