Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Potato aucuba mosaic potexvirus

Index

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

Data collated by C. Büchen-Osmond and D.A. Govier, 1987.

Nomenclature

Synonyms

potato G virus, potato virus F, tuber blotch virus.

Acronym

PAMV

Strains

potato virus F, synonym of tuber blotch virus (Clinch et al., 1936).

ICTV decimal code

56.0.1.0.017

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Solanum tuberosum - chlorotic local lesions on older leaves, necrotic on younger, systemic (top) necrosis (Clinch, 1941). Stored tubers develop necrosis in the cortex and pith with irregular brown or sunken patches on the surface.

Transmission

Transmitted by a vector; an insect; Myzus persicae; Aphididae. Transmitted in a non-persistent manner. Virus requires, for vector transmission, a helper virus (any potyvirus, such as potato viruses A and Y; Kassanis and Govier, 1971a;b); transmitted by mechanical inoculation.

Geographical distribution

Probably distributed worldwide (but uncommon).

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Capsicum annuum, C. frutescens - necrotic local lesions then epinasty, systemic mosaic or necrosis, young plants killed.
• Nicotiana glutinosa - light green mottle with dark green vein-banding.
• Lycopersicon esculentum - small chlorotic local lesions.
• Nicotiana tabacum cvs White Burley and Xanthi-nc, Datura stramonium and Petunia sp. - systemic infection but usually symptomless.

Maintenance and propagation hosts

Nicotiana tabacum cv. Xanthi-nc.

Assay hosts (Local lesions or Whole plants)

Capsicum annuum cv. Long Red (L/W), C. frutescens cv. Early Calwonder (L/W).

Susceptible host species

• Capsicum annuum
• Capsicum frutescens
• Datura stramonium
• Lycopersicon esculentum
• Nicotiana glutinosa
• Nicotiana tabacum
• Petunia × hybrida
• Solanum tuberosum

Insusceptible host species

• Tinantia erecta

Families containing susceptible hosts

• Solanaceae (8/8)

Families containing insusceptible hosts

• Commelinaceae (1/1)

Physical and biochemical properties

Properties of particles in sap

TIP: 65-70 °C. LIV: 30-60 days (at 18-20ºC; Kollmer and Larson, 1960). DEP: log₁₀ minus 5-6.

Purification method

Govier and Kassanis (1972).

Particle morphology

Virions filamentous; not enveloped; usually flexuous; with a clear modal length; of 580 nm; 11 nm wide.

Physical properties

One sedimenting component in purified preparations; sedimentation coefficient 130 S.

Biochemical properties

Virions contain 5 % nucleic acid; 95 % protein; 0 % lipid.

Genome consists of RNA; single-stranded. Base composition 25 % G; 30 % A; 24 % C; 21 % U.

NCBI sequence data (Entrez search)

Sequence database accession code(s)

• S73580 Gb(89)_un:S73580 putative polymerase. capsid protein potato aucuba mosaic potexvirus PAMV. Genomic RNA Complete.

Features of proteins

Virion protein(s) one; M_r 26000.

Cytopathology

Virions found in all parts of the host plant; in cytoplasm (sometimes in dense aggregates).

Taxonomy and relationships

Potexvirus

Best tests for diagnosis

The symptoms in potato resemble those of potato mop-top virus (PMTV); both cause necrosis on the tuber surface, but those of PAMV are less clearly patterned than the raised necrotic rings caused by first-year infection with PMTV; however, PAMV sometimes causes necrotic rings. PAMV, but not PMTV, infects Capsicum annuum systemically, they have virions of different sizes (Harrison and Jones, 1970).

Comments and References

References

• Clinch, P.J. (1941). Scient. Proc. R. Dubl. Soc. N. S. 22: 435.
• Clinch, P.J., Loughnane, J.B. and Murphy, P.A. (1936). Scient. Proc. R. Dubl. Sco. N. S. 21: 431.
• Harrison, B.D. and Jones, R.A.C. (1970). Ann. appl. Biol. 65: 393.
• Kassanis, B. and Govier, D.A. (1971a). J. gen. Virol. 10: 99.
• Kassanis, B. and Govier, D.A. (1971b). J. gen. Virol. 13: 221013.
• Kassanis, B. and Govier, D.A. (1972). CMI/AAB Descr. Pl. Viruses No. 98, 4 pp.
• Kollmer, G.F. and Larson, R.H. (1960). Res. Bull. agric. Exp. Stn Univ. Wis. 223.
• Quanjer, H.M. (1921). R. hort. Soc., Lond. Rep. int. Potato Conf. 127.

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.