Tobacco ringspot virus
| Tobacco ringspot virus (TRSV) | |
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Group IV ((+)ssRNA)
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| Order: | |
| Family: | |
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| Species: |
Tobacco ringspot virus
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Tobacco ringspot virus (TRSV) is a plant pathogenic virus in the plant virus family Secoviridae. It is the type species of the genus Nepovirus. Nepoviruses are transmitted between plants by nematodes, varroa mites and honeybees.[1] TRSV is also easily transmitted by sap inoculation and transmission in seeds has been reported.[2] In recent cases it has also been shown to appear in bees.
TRSV was observed for the first time in tobacco fields in Virginia and described in 1927.[3] It is an isometric particle[4] with a bipartite RNA genome. The virus has a wide host range[5] that includes field grown crops, ornamentals and weeds. Its name comes from its most common symptom being chlorotic ringspots on the leaves of infected plants.[6] In some areas this virus has caused growers to stop growing affected crops.[7]
A. B. File:Tobacco ringspot virus.jpg C. File:Nepo5b.jpg
Symptoms and virus inclusions of Tobacco ringspot nepovirus in the host Zamia furfuracea, the Cardboard Cycad.[8] 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),[9] one is vacuolate (Vac Inc) and the other more crystalloid (Cyst Inc - darker spots). C. Vacuolate inclusions only.
References
- ↑ Systemic spread and propagation of a plant-pathogenic virus in European honeybees, Apis mellifera
- ↑ Murant, Seed Sci. Technol. 11: 973, 1983
- ↑ Fromme, Wingard & Priode, Phytopathology 17: 321, 1927.
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- ↑ Price, Am. J. Bot. 27: 530, 1940.
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- ↑ Christie, R.G. and Edwardson, J.R. (1977). Fla Agric. Exp. Stn Monog. No. 9, 150 pp.
External links
- Description of Plant Viruses:Tobacco ringspot virus
- ICTVdB—The Universal Virus Database: Tobacco ringspot virus
- Family Groups—The Baltimore Method
