Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Cocksfoot mottle sobemovirus

Index

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

Data collated by P. Jeyanandarajah, 1991.

Nomenclature

Synonyms

cocksfoot necrotic mosaic virus.

Acronym

CoMV

ICTV decimal code

67.0.1.0.003

Host range and symptoms

Natural host range and symptoms

Symptoms persist. Symptoms streaking and mottling of leaves.
• Dactylis glomerata, Triticum aestivum - conspicuous yellow streaking and mottling of leaves.

Transmission

Transmitted by a vector; an insect; Chrysomelid beetles, Lema melanopa, L. lichenis; Coleoptera. Transmitted in a semi-persistent manner. Virus transmitted by mechanical inoculation; not transmitted by seed.

Geographical distribution

Spreads in France, Germany, Japan, New Zealand, and the UK.

Experimental host range

Few (<3) families susceptible. Experimentally infected plants mostly show yellow streaking and mottling with necrosis.

Diagnostically susceptible host species and symptoms

• Avena sativa, Dactylis glomerata, Hordeum vulgare, Triticum aestivum - systemic leaf streaking, mottling and necrosis.

Diagnostically insusceptible host species

Musa balbisiana, Oryza sativa, Poa pratensis, Sorghum halepense, Zea mays.

Maintenance and propagation hosts

Dactylis glomerata.

Susceptible host species

• Avena sativa
• Dactylis glomerata
• Hordeum vulgare
• Triticum aestivum

Insusceptible host species

• Anthoxanthum odoratum
• Bromus mollis
• Chenopodium amaranticolor
• Chenopodium hybridum
• Chenopodium quinoa
• Cucumis sativus
• Elytrigia repens
• Lilium formosanum
• Lolium perenne
• Musa balbisiana
• Nicotiana clevelandii
• Nicotiana glutinosa
• Nicotiana tabacum
• Oryza sativa
• Petunia × hybrida
• Phaseolus vulgaris
• Poa pratensis
• Poa trivialis
• Sorghum halepense
• Vicia faba
• Zea mays

Families containing susceptible hosts

• Gramineae (4/13)

Families containing insusceptible hosts

• Chenopodiaceae (3/3)
• Cucurbitaceae (1/1)
• Gramineae (9/13)
• Leguminosae-Papilionoideae (2/2)
• Liliaceae (1/1)
• Musaceae (1/1)
• Solanaceae (4/4)

Physical and biochemical properties

Properties of particles in sap

TIP: 65 °C. LIV: 4-6 days (at 20ºC). DEP: log₁₀ minus 3.

Particle morphology

Virions isometric; 30 nm in diameter; angular in profile.

Physical properties

Sedimentation coefficient 118 S. Density 1.39 g cm^-3 in CsCl. A₂₆₀/A₂₈₀ ratio 1.6.

Biochemical properties

Virions contain 25 % nucleic acid; 75 % protein.

Genome consists of RNA; single-stranded. Total genome size 4.35 kb. Genome unipartite; largest (or only) genome part 4.35 kb.

NCBI sequence data (Entrez search)

Sequence database accession code(s)

• Z36903 Gb(89)n:Cmvrep Cocksfoot mottle virus gene for putative replicase. 6/95 2,838bp.
• Z48630 Em(44)n:Cfmvseq Gb(90)_vi:Cfmvseq Cocksfoot Mottle Virus genes for polyprotein, RNA dependent RNA polymerase and coat protein.

Features of proteins

Virion protein(s) one; M_r 31000; coat protein.

Cytopathology

Virions found in all parts of the host plant.

Taxonomy and relationships

Sobemovirus

Virus(es) with serologically related virions

Cynosurus mottle virus (New Zealand isolate).

Virus(es) with serologically unrelated virions

Cynosurus mottle virus (European isolate).

Additional comments on relationships

The genome of a New Zealand isolate is reported to have 5-8% nucleotide sequence homology with that of cynosurus mottle virus.

Comments and References

General comments

Although the virus alone will not infect Cynosurus cristatus, it induces systemic infection when present together with cynosurus mottle (?) sobemovirus.

References

• Catherall, P.L. (1970). CMI/AAB Descr. Pl. Viruses No. 23, 3 pp.
• Hariri, D. and Lapierre, H. (1978). C.N.R.A., I.N.R.A., Versailles, France, p. 281.
• Hull, R. (1977a).J. gen. Virol. 36: 289.
• Hull, R. (1977b). Virology 79: 50.
• Hull, R. (1977c). Virology 79: 58.
• Huth, W. (1968). Phytopath. Z. 62: 300.
• Mohamed, N.A. (1980). J. agric. Res. 23: 273.
• Mohamed, N.A. and Mossop, D.W. (1981). J. gen. Virol. 55: 63.
• Rabenstein, F. and Schmidt, H.B. (1979). Arch. Phytopath. Pflanzenschutz 15: 351.
• Serjeant, E.P. (1963). Rep. Rothamsted Exp. Stn. 1962, p. 112.
• Serjeant, E.P. (1964). Pl. Path. 13: 23.
• Serjeant, E.P. (1967). Ann. appl. Biol. 59: 31.
• Taliansky, M.E., Malyshenko, S.I., Pshannikova, E.S. and Atabekov, J.G. (1982). Virology 122: 327.
• Toriyama, S. (1982). Ann. Phytopath. Soc. Japan 48: 514.

Illustrations

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.