Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Melon Ourmia ourmiavirus

Index

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

Data collated by A.A. Brunt, 1990.

Nomenclature

Synonyms

Ourmia melon virus.

Acronym

OuMV

ICTV decimal code

79.0.P.4.008

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Cucumis melo - chlorotic spots and irregular ringspots, puckering.

Geographical distribution

Spreads in Iran.

Experimental host range

Many (>9) families susceptible. Experimentally infected plants mostly show systemic mosaics, mottles, ringspots or necrosis.

Diagnostically susceptible host species and symptoms

• Chenopodium quinoa, Gomphrena globosa - necrotic local lesions.
• Nicotiana clevelandii, N. benthamiana, N. megalosiphon - chlorotic local lesions; systemic necrotic mosaic.
• Petunia × hybrida, Callistephus chinensis, Cucumis sativus, Cucumis melo - severe systemic chlorosis.

Diagnostically insusceptible host species

Brassica oleracea, Pisum sativum, Solanum tuberosum, Trifolium repens.

Maintenance and propagation hosts

Cucumis melo, Nicotiana benthamiana, N. clevelandii, Petunia × hybrida.

Assay hosts (Local lesions or Whole plants)

Chenopodium quinoa (L), Gomphrena globosa (L).

Susceptible host species

• Apium graveolens
• Calendula officinalis
• Callistephus chinensis
• Capsicum annuum
• Chenopodium amaranticolor
• Chenopodium quinoa
• Cucumis melo
• Cucumis metuliferus
• Cucumis sativus
• Datura stramonium
• Dianthus barbatus
• Gomphrena globosa
• Luffa acutangula
• Lycopersicon esculentum
• Nicotiana benthamiana
• Nicotiana clevelandii
• Nicotiana glutinosa
• Nicotiana megalosiphon
• Nicotiana tabacum
• Ocimum basilicum
• Petunia × hybrida
• Phaseolus vulgaris
• Phlox drummondii
• Raphanus sativus
• Spinacia oleracea
• Tetragonia tetragonioides
• Vicia faba
• Vigna unguiculata
• Zinnia elegans

Insusceptible host species

• Brassica oleracea
• Pisum sativum
• Solanum tuberosum
• Trifolium repens

Families containing susceptible hosts

• Amaranthaceae (1/1)
• Caryophyllaceae (1/1)
• Chenopodiaceae (3/3)
• Compositae (3/3)
• Cruciferae (1/2)
• Cucurbitaceae (4/4)
• Labiatae (1/1)
• Leguminosae-Papilionoideae (3/5)
• Polemoniaceae (1/1)
• Solanaceae (9 /10)
• Tetragoniaceae (1/1)
• Umbelliferae (1/1)

Families containing insusceptible hosts

• Cruciferae (1/2)
• Leguminosae-Papilionoideae (2/5)
• Solanaceae (1/10)

Sources of host-range data

Lisa et al. (1988).

Physical and biochemical properties

Properties of particles in sap

TIP: 70-80 °C. LIV: 35 days (more than at 20-25ºC). DEP: log₁₀ minus 5-6.

Purification method

Lisa et al. (1988).

Particle morphology

Virions bacilliform; not enveloped; 30 nm in length, or 37 nm in length; 18.5 nm wide.

Physical properties

Two sedimenting components in purified preparations (in sucrose), or one sedimenting component in purified preparations (in caesium chloride). Density 1.375 g cm^-3 in CsCl.

Biochemical properties

Genome consists of RNA; single-stranded; linear. Total genome size 1.58 kb. Genome of three parts; largest (or only) genome part the largest 0.91 kb; the 2nd largest 0.35 kb; the 3rd largest 0.32 kb. Genomic nucleic acid isolated by Lisa et al. (1988).

Features of proteins

Virion protein(s) one (and a fragment); M_r 26300 (and 23300); coat protein. Method of preparation: Lisa et al. (1988).

Taxonomy and relationships

ourmiavirus (the type species)

Virus(es) with serologically unrelated virions

Alfalfa mosaic, olive latent 2, cassava Ivorian bacilliform and pelargonium zonate spot viruses.

Comments and References

General comments

Ourmiavirus has been proposed as the name of a viral genus containing this and the similar, but serologically unrelated, viruses listed above (Accotto et al., 1990).

References

• Accotto, G.P., Riccioni, L., Barba, M., Lisa, V. and Boccardo, G. (1990). 8th Int. Congr. Virology, Berlin, 1990; No. P79-025, p. 448.
• Lisa, V., Milne, R.G., Acotto, G.P., Boccardo, G. and Caciagli, P. (1988). Ann. appl. Biol. 112: 291.

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.