Tobacco Necrosis, Satellite Tobacco Necrosis, and Related Viruses
Necrovirus is a recently coined name for a very small group, presently encompassing only tobacco necrosis virus (TNV) and possibly cucumber necrosis and melon necrotic spot virus. Although TNV was identified very early in the history of plant virology (Smith and Bald, 1935; Pirie et al., 1938; Bawden and Pirie, 1945) and although it has a number of unusual features, this virus has been studied less frequently and in fewer laboratories than most of the long-known viruses. One of the particular aspects of TNV is that it is frequently associated with a satellite, tobacco necrosis satellite virus (TNSV), a very small particle unable to replicate in the absence of TNV (Kassanis and Nixon, 1960, 1961). Another cause for special interest is the mode of its specific transmission by a fungus, Olpidium brassicae (Teakle, 1962; Teakle and Hiruki, 1964). Although TNV can become replicated in many plant species it is not a widespread pathogen and is of little economic importance (Uyemoto, 1981). Its function as a helper for the replication of TNSV, however, makes it of great interest to the scientist concerned with the mode of viral replication.
KeywordsCoat Protein Plant Virus Tobacco Necrosis Virus Satellite Virus Melon Necrotic Spot Virus
Unable to display preview. Download preview PDF.
- Ameloot, P., van Emmelo, J., and Fiers, W., 1983, SV-4, a new satellite tobacco necrosis virus variant, Med. Fac. Landbouww, Rijksuniv. Gant 48(3):787Google Scholar
- Bawden, F. C., and Pirie, N. W., 1945, Further studies on the purification and properties of a virus causing tobacco necrosis, Br. J. Exp. Pathol. 26:277.Google Scholar
- Dias, H. F., 1970, The relationship between Cucumber Necrosis Virus and its vector, Olpidium cucurbitacearum, Virology 42:204.Google Scholar
- Faccioli, G., and Capponi, R., 1983, An antiviral factor present in plants of Chenopodium amarantico1or locally infected by TNV. 1. Extraction, partial purification, biological and chemical properties, Phytopathol. Z. 106:289.Google Scholar
- Francki, R. I. B., Milne, R. G., and Hatta, T. (eds.), 1985, Atlas of Plant Viruses, Volume I, CRC Press, Boca Raton.Google Scholar
- Kassanis, B., 1978, TNV Group Atlas of Insect and Plant Viruses (Maramorosh, K., ed.), p. 281, Academic Press, New York.Google Scholar
- Kassanis, B., and Nixon, H. L., 1961, Activation of one tobacco necrosis virus by another, J. Gen. Microbial. 25:459.Google Scholar
- Roggero, P., and Pennazio, S., 1984, Quantitative determination by ELISHA of TNV from necrotic local lesions in tobacco, J. Viral. Methods 8:282.Google Scholar
- Teakle, D. S., 1962, Transmission of tobacco necrosis virus by a fungus, Olpidium brassicae, Virology 18:224.Google Scholar
- Uyemoto, J. K., 1981, Tobacco necrosis and satellite viruses, in: Handbook of Plant Virus Infections and Comparative Diagnosis (E. Kurstak, ed.), p. 123, Elsevier/North Holland Biomedical Press, Amsterdam.Google Scholar
- Yarwood, C. E., 1960, Release and preservation of virus by roots, Phytopathol. 50: 111Google Scholar