Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Peach rosette mosaic nepovirus

Index

• Nomenclature
• Host range, transmission and symptoms
• Physical and biochemical properties
• Taxonomy and relationships
• Comments and References

Data collated by D.C Ramsdell, 1987.

Nomenclature

Acronym

PRMV

Strains

grape isolate, peach isolate.

ICTV decimal code

18.0.3.0.023

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Prunus persica - shoot terminals rosetted, mosaic, stunting.
• Vitis spp. - short, crooked cane internodes; leaf malformation, basal stems flat.
• Rumex crispus, Solanum carolinense, Taraxacum officinale - no symptoms (Ramsdell and Gillet, 1981).

Transmission

Transmitted by a vector; a nematode; Xiphinema americanum, Longidorus diadecturus; Dorylamidae. Virus transmitted by mechanical inoculation; transmitted by grafting; not transmitted by contact between plants; transmitted by seed.

Ecology and control

Studies reported by Ramsdell and Myers (1974); Ramsdell and Myers (1978); Ramsdell et al. (1983).

Geographical distribution

Spreads in Canada and the USA (Ontario and Michigan, respectively).

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Chenopodium quinoa - chlorotic local lesions, tip necrosis and epinasty.
• C. amaranticolor - faint systemic mottle.

Maintenance and propagation hosts

Chenopodium quinoa, C. amaranticolor.

Assay hosts (Local lesions or Whole plants)

Chenopodium quinoa (L), C. amaranticolor (W).

Susceptible host species

• Chenopodium amaranticolor
• Chenopodium quinoa
• Gomphrena globosa
• Nicotiana tabacum
• Prunus persica
• Rumex crispus
• Solanum carolinense
• Taraxacum officinale
• Vitis labrusca

Families containing susceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (2/2)
• Compositae (1/1)
• Polygonaceae (1/1)
• Rosaceae (1/1)
• Solanaceae (2/2)
• Vitidaceae (1/1)

Sources of host-range data

Dias (1975).

Physical and biochemical properties

Properties of particles in sap

TIP: 58-68 °C (in Chenopodium quinoa sap for 10 minutes). LIV: 15-25 days (at room temperature). DEP: log₁₀ minus 3-5. Leaf sap contains few virions.

Purification method

Dias (1975); Dias et al. (1980).

Particle morphology

Virions isometric; not enveloped; 28 nm in diameter; angular in profile.

Physical properties

Three sedimenting components in purified preparations; sedimentation coefficient of the fastest 134 S (B); of the other(s) 115 S (M), or 52 S (T). Density 1.51 g cm^-3 in CsCl (B), or 1.47 g cm^-3 in CsCl (M; not fixed with aldehydes).

Biochemical properties

Virions contain 41 % nucleic acid.

Genome consists of RNA; single-stranded. Total genome size 13.2 kb. Genome of two parts; largest (or only) genome part the larger 7 kb; the 2nd largest 6.2 kb. Genomic nucleic acid isolated by Allen and Dias (1976). Base composition 23.7 % G; 25.2 % A; 20.9 % C; 30.4 % U.

Features of proteins

Virion protein(s) one; M_r 57000.

Replication

Replication does not depend on a helper virus.

Taxonomy and relationships

Nepovirus: Comoviridae

Virus(es) with serologically unrelated virions

Many other nepoviruses.

Best tests for diagnosis

Sap inoculate to Chenopodium quinoa, from grape in 2% nicotine followed by gel diffusion or ELISA serological tests.

Comments and References

References

• Catson (1933). Q. Bull. Mich. State Univ. agric. Exp. Stn 16: 79.
• Dias, H.F. (1975). CMI/AAB Descr. Pl. Viruses No. 150, 4 pp.
• Ramsdell, D.C. and Myers, R.L. (1974). Phytopathology 64: 1174.
• Ramsdell, D.C. and Myers, R.L. (1978). Phytopathology 68: 447.
• Ramsdell, D.C., Andrews, R.W., Gillet, J.M. and Morris, C.E. (1979). Pl. Dis. Reptr 63: 74.

Cite this publication as: Brunt, A.A., Crabtree, K., Dallwitz, M.J., Gibbs, A.J., Watson, L. and Zurcher, E.J. (eds.) (1996 onwards). `Plant Viruses Online: Descriptions and Lists from the VIDE Database. Version: 20^th August 1996.' URL http://biology.anu.edu.au/Groups/MES/vide/

Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993) should also be cited.