Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Ullucus C comovirus

Index

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

Data collated by A.A. Brunt, 1986.

Nomenclature

Acronym

UVC.

ICTV decimal code

18.0.1.0.016

Host range and symptoms

Natural host range and symptoms

• Ullucus tuberosus - symptomless infection.

Transmission

Virus transmitted by mechanical inoculation; transmitted by grafting; not transmitted by seed.

Geographical distribution

Spreads in Bolivia and Peru.

Experimental host range

Several (3-9) families susceptible.

Diagnostically susceptible host species and symptoms

• Chenopodium amaranticolor, C. quinoa - chlorotic local lesions and systemic leaf chlorosis.
• Chenopodium murale - chlorotic local lesions; not systemic.
• Tetragonia tetragonioides - local lesions; not systemic.
• Nicotiana clevelandii - symptomless infection of inoculated leaves; not systemic.

Diagnostically insusceptible host species

Nicotiana glutinosa, N. tabacum, Gomphrena globosa, Cucumis sativus, Phaseolus vulgaris.

Maintenance and propagation hosts

Chenopodium quinoa, Ullucus tuberosus.

Assay hosts (Local lesions or Whole plants)

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

Susceptible host species

• Chenopodium amaranticolor
• Chenopodium murale
• Chenopodium quinoa
• Nicotiana clevelandii
• Tetragonia tetragonioides
• Ullucus tuberosus

Insusceptible host species

• Amaranthus caudatus
• Arachis hypogaea
• Brassica campestris ssp. pekinensis
• Cucumis sativus
• Datura metel
• Datura stramonium
• Gomphrena globosa
• Lycopersicon esculentum
• Montia perfoliata
• Nicandra physalodes
• Nicotiana debneyi
• Nicotiana glutinosa
• Nicotiana megalosiphon
• Nicotiana rustica
• Nicotiana tabacum
• Phaseolus vulgaris
• Physalis floridana
• Pisum sativum
• Solanum tuberosum
• Vicia faba
• Vigna unguiculata

Families containing susceptible hosts

• Basellaceae (1/1)
• Chenopodiaceae (3/3)
• Solanaceae (1/12)
• Tetragoniaceae (1/1)

Families containing insusceptible hosts

• Amaranthaceae (2/2)
• Cruciferae (1/1)
• Cucurbitaceae (1/1)
• Leguminosae-Papilionoideae (5/5)
• Portulacaceae (1/1)
• Solanaceae (11/12)

Physical and biochemical properties

Properties of particles in sap

TIP: 70-75 °C. LIV: 45-112 days. DEP: log₁₀ minus 7-8. Leaf sap contains many virions.

Purification method

Brunt et al. (1982b).

Particle morphology

Virions isometric; 28 nm in diameter; angular in profile; with a conspicuous capsomere arrangement.

Physical properties

Three sedimenting components in purified preparations; sedimentation coefficient of the fastest 116 S (B); of the other(s) 51 S (T), or 95 S (M). Density 1.404 g cm^-3 in CsCl (M), or 1.463 g cm^-3 in CsCl (B). A₂₆₀/A₂₈₀ ratio 1.58 (M), or 1.65 (B; all corrected for light scattering).

Biochemical properties

Virions contain 38 % nucleic acid (B), or 30 % nucleic acid (M), or 0 % nucleic acid (T); 62 % protein (B), or 70 % protein (M), or 100 % protein (T).

Genome consists of RNA; single-stranded. Total genome size 10.7 kb. Genome of two parts; largest (or only) genome part the larger 6.2 kb; the 2nd largest 4.5 kb.

Features of proteins

Virion protein(s) two; M_r of the larger 45100. M_r of 2nd largest 20700.

Taxonomy and relationships

Comovirus: Comoviridae

Virus(es) with serologically related virions

Cowpea mosaic virus is distantly related.

Virus(es) with serologically unrelated virions

Andean potato mottle, bean pod mottle, bean rugose mosaic, broad bean stain, cowpea severe mosaic, broad bean true mosaic, glycine mosaic, quail pea mosaic, radish mosaic, red clover mottle and squash mosaic viruses.

Comments and References

References

• Brunt, A.A., Phillips, S., Jones, R.A.C. and Kenten, R.H. (1982a). Ann. appl. Biol. 101: 65.
• Brunt, A.A., Barton, R.J., Phillips, S. and Jones, R.A.C. (1982b). Ann. appl. Biol. 101: 73.
• Brunt, A.A., Phillips, S., Barton, R.J. and Jones, R.A.C. (1986). CMI/AAB Descr. Pl. Viruses No. 277, 4 pp.

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.