Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Cynosurus mottle (?) sobemovirus

Index

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

Data collated by A.A. Brunt, 1992.

Nomenclature

Synonyms

lolium mottle virus (A'Brook, 1972).

Acronym

CnMoV

ICTV decimal code

67.0.1.T.013

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Agrostis tenuis, Cynosurus cristatus - severe leaf mottling and necrosis.
• Agrostis stolonifera - dark green leaf mottling.
• Lolium perenne, Lolium multiflorum × L. perenne - chlorotic leaf mottling.

Transmission

Transmitted by a vector; an insect; Rhopalosiphum padi (New Zealand isolate); Aphididae. Transmitted in a non-persistent manner. Virus transmitted by mechanical inoculation.

Geographical distribution

Spreads in Germany, New Zealand, and the UK.

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Agrostis puchella, Bromus secalinus, Cynosurus cristatus, Lagurus ovatus, Phleum arenarium, Triticum aestivum - severe systemic leaf mottling and, often, necrosis.
• Avena fatua, A. sativa, Hordeum vulgare, Secale cereale - mild systemic leaf mottling.

Diagnostically insusceptible host species

Elytrigia repens, Bromus mollis, Dactylis glomerata, Lolium multiflorum, Setaria italica.

Maintenance and propagation hosts

Avena sativa, Triticum aestivum.

Assay hosts (Local lesions or Whole plants)

Avena sativa (W), Cynosurus cristatus (W), Triticum aestivum (W).

Susceptible host species

• Agrostis puchella
• Agrostis stolonifera
• Agrostis tenuis
• Avena fatua
• Avena sativa
• Bromus secalinus
• Cynosurus cristatus
• Hordeum vulgare
• Lagurus ovatus
• Lolium multiflorum × L. perenne
• Lolium perenne
• Phleum arenarium
• Poa annua
• Secale cereale
• Triticum aestivum

Insusceptible host species

• Bromus mollis
• Dactylis glomerata
• Echinochloa colona
• Echinochloa crus-galli
• Elytrigia repens
• Festuca pratensis
• Lamarckia aurea
• Lolium multiflorum
• Lolium perenne
• Oryza sativa
• Panicum miliaceum
• Poa annua
• Setaria italica
• Setaria viridis
• Zea mays

Families containing susceptible hosts

• Gramineae (15/28)

Families containing insusceptible hosts

• Gramineae (15/28)

Sources of host-range data

Catherall et al. (1977); Mohamed (1978a).

Physical and biochemical properties

Properties of particles in sap

TIP: 75 °C. DEP: log₁₀ minus 8.

Purification method

Mohamed (1978b).

Particle morphology

Virions isometric; not enveloped; 28 nm in diameter; angular in profile.

Physical properties

One sedimenting component in purified preparations; sedimentation coefficient 113 S. Density 1.399 g cm^-3 in CsCl. Density 1.332 g cm^-3 in Cs₂SO₄. A₂₆₀/A₂₈₀ ratio 1.72.

Biochemical properties

Virions contain 22.5 % nucleic acid; 77.5 % protein.

Genome consists of RNA; single-stranded; largest (or only) genome part 4.3 kb. Genomic nucleic acid isolated by Mohamed (1978b). Base composition 24.2 % G; 24.3 % A; 26.2 % C; 25.3 % U.

Features of proteins

Virion protein(s) one; M_r 30500; and it is coat protein.

Cytopathology

Virions found in leaves and mesophyll; in cytoplasm and in cell vacuoles. Inclusions absent from infected cells.

Taxonomy and relationships

Possible Sobemovirus

Virus(es) with serologically related virions

Cocksfoot mottle virus.

Additional comments on relationships

The viral RNA has 5-8% nucleotide sequence homology with that of cocksfoot mottle virus.

Comments and References

References

• A'Brook, J. (1972). Pl. Path. 32: 118.
• Catherall, P.L., Andrews, P.A. and Chamberlain, J.A. (1977). Ann. appl. Biol. 87: 233.
• Hull, R. (1977). J. gen. Virol. 36: 289.
• Hull, R. (1988). In: The Plant Viruses, Vol. 3, Polyhedral Virions with Monopartite RNA Genomes, p. 113; ed. R. Koenig. Plenum Press, New York.
• Huth, W. and Paul, H.L. (1977). Annls. Phytopath. 9: 293.
• Mohamed, N.A. (1978a). N.Z. Jl agric. Res. 21: 709.
• Mohamed, N.A. (1978b). J. gen. Virol. 40: 379.
• Mohamed, N.A. and Mossop, D.W. (1981). J. gen. Virol. 55: 63.
• Paul, H.L., Querfurth, G. and Huth, W. (1980). J. gen. Virol. 47: 67.

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.