Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Pea mild mosaic comovirus

Index

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

Data collated by A.A. Brunt, 1991.

Nomenclature

Acronym

PMiMV

ICTV decimal code

18.0.1.0.011

Host range and symptoms

Natural host range and symptoms

• Pisum sativum - inconspicuous leaf chlorosis or symptomless infection.

Transmission

Virus transmitted by mechanical inoculation; transmitted by seed.

Geographical distribution

Spreads in New Zealand.

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Phaseolus vulgaris - small necrotic local lesions in some cultivars or large chlorotic local lesions; no systemic infection. Cultivar Pinto is immune.
• Pisum sativum - systemic vein-clearing, vein-etching or necrosis, leaf-rolling and, sometimes, necrosis after 10-15 days; plants then recover.
• Vicia faba - light green mosaic in systemically infected leaves.

Diagnostically insusceptible host species

Medicago sativa, Nicotiana tabacum, Trifolium repens, T. pratense, Vigna unguiculata.

Maintenance and propagation hosts

Pisum sativum, Vicia faba.

Assay hosts (Local lesions or Whole plants)

Phaseolus vulgaris cv. Bountiful (L), Pisum sativum (W).

Susceptible host species

• Cicer arietinum
• Glycine max
• Lathyrus odoratus
• Medicago hispida
• Melilotus albus
• Phaseolus vulgaris
• Pisum sativum
• Trifolium incarnatum
• Trifolium subterraneum
• Vicia faba

Insusceptible host species

• Chenopodium quinoa
• Cucumis sativus
• Datura stramonium
• Gomphrena globosa
• Lycopersicon esculentum
• Medicago sativa
• Nicotiana glutinosa
• Nicotiana tabacum
• Trifolium pratense
• Trifolium repens
• Vigna unguiculata
• Zinnia elegans

Families containing susceptible hosts

• Leguminosae-Papilionoideae (10/14)

Families containing insusceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (1/1)
• Compositae (1/1)
• Cucurbitaceae (1/1)
• Leguminosae-Papilionoideae (4/14)
• Solanaceae (4/4)

Sources of host-range data

Clark (1972).

Physical and biochemical properties

Properties of particles in sap

TIP: 68 °C. LIV: more than 21 days (at 18ºC). DEP: log₁₀ minus 6. Leaf sap contains few virions.

Purification method

Clark (1972).

Particle morphology

Virions isometric; not enveloped; 27 nm in diameter; angular in profile; with a conspicuous capsomere arrangement.

Physical properties

Three sedimenting components in purified preparations; sedimentation coefficient of the fastest 119 S (B); of the other(s) 94 S (M), or 55 S (T). A₂₆₀/A₂₈₀ ratio 1.79 (B), or 1.67 (M), or 0.86 (T).

Biochemical properties

Genome consists of RNA; single-stranded. Total genome size 13.5 kb. Genome of two parts; largest (or only) genome part the larger 8.5 kb; the 2nd largest 5 kb. Base composition 25 % G; 29 % A; 17 % C; 29 % U.

Taxonomy and relationships

Comovirus: Comoviridae

Virus(es) with serologically related virions

Cowpea severe mosaic virus.

Virus(es) with serologically unrelated virions

Bean pod mottle, broad bean stain, cowpea mosaic and red clover mottle viruses.

Comments and References

References

• Clark, M.F. (1972). N.Z. Jl agric. Res. 15: 846.

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.