Papaya mosaic virus
|Papaya mosaic virus (PapMV)|
|Group:||Group IV ((+)ssRNA)|
|Species:||Papaya mosaic virus|
The virus is a monopartite strand of positive-sense, single-stranded RNA surrounded by a capsid made for a single viral encoded protein. The genome has been completely sequenced and is 6656 nucleotides long. It is transmitted by mechanical inoculation. No insect vector is involved and it is not transmitted in seeds.
Hosts, Symptoms and Distribution
Its principle host is papaya (Carica papaya), although in host range studies, PapMV was able to infect a few other plants including snapdragons (Antirrhinum majus). It is also reported to naturally infect Ullucus tuberosus.
PapMV was first reported in papaya in 1962 together with another virus that became known as Papaya ringspot virus (PRSV), a potyvirus. The two viruses were differentiated in 1965 and 1967 using particle lengths, serology, host range, inclusions, and aphid transmissibility.
PapMV causes mild mosaic symptoms on papaya leaves and stunting of the plant. It is known to occur in South America (Bolivia, Peru, and Venezuela) and the USA.
- Flexous rods of Papaya mosaic virus
- Inclusions of PapMV stained in Azure A
- Zettler, F.W., Edwardson, J.R. and Purcifull, D.E. 1968. Phytopathology 58: 332
- Purcifull, D.E., Edwardson, J.R. and Christie, R.G. (1966). Virology 29: 276.
- Christie, R.G. and Edwardson, J.R. (1977). Fla Agric. Exp. Stn Monog. No. 9, 150 pp.
- How to Stain for Plant Virus Inclusions
- Conover, R.A. 1962. Phytopathology 52: 6.
- de Bokx, J.A. 1965. Pl. Dis. Reptr 49: 742
- Cook & Zettler, Pl. Dis. Reptr 54: 893, 1970
- Symptoms of Papaya mosaic virus in a papaya leaf