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Descriptions and Lists from the VIDE Database

Guinea grass mosaic potyvirus

Index

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

Data collated by J.C. Thouvenel, 1984.

Nomenclature

Acronym

GGMV

Strains

guinea grass mosaic virus - strain B (from maize), guinea grass mosaic virus - strain D (from pearl millet), brachiaria strain (Morales et al., 1994).

ICTV decimal code

57.0.1.0.028

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Panicum maximum, Pennisetum americanum, Zea mays - green mosaic.

Transmission

Transmitted by a vector (both strains B and D); an insect; Hysteroneura setariae, Rhopalosiphum maidis; Aphididae. Transmitted in a non-persistent manner. Virus does not require a helper virus for vector transmission; transmitted by mechanical inoculation; not transmitted by seed.

Geographical distribution

Spreads in Brazil, Colombia, and Cote d'Ivoire.

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Panicum maximum, Bromus macrostachys - systemic green mosaic (strains A and D).
• Avena fatua, Eleusine coracana - systemic green mosaic (strain B).
• Setaria italica, Bromus sterilis - systemic green mosaic (strains A and B).
• Zea mays - systemic green mosaic (strains A, B and D).

Diagnostically insusceptible host species

Dactylis glomerata, Digitaria sanguinalis, Hordeum vulgare, Oryza sativa, Triticum durum.

Maintenance and propagation hosts

Panicum maximum (strain A), Pennisetum americanum (strain D), Zea mays (strain B).

Assay hosts (Local lesions or Whole plants)

Setaria italica (W) for strains A and B.

Susceptible host species

• Avena fatua
• Bromus macrostachys
• Bromus sterilis
• Echinochloa crus-galli
• Eleusine coracana
• Panicum maximum
• Pennisetum americanum
• Setaria italica
• Stenotaphrum secundatum
• Zea mays

Insusceptible host species

• Avena sativa
• Dactylis glomerata
• Digitaria sanguinalis
• Eleusine coracana
• Hordeum vulgare
• Oryza sativa
• Panicum capillare
• Saccharum officinarum
• Triticum aestivum
• Triticum durum

Families containing susceptible hosts

• Gramineae (10/19)

Families containing insusceptible hosts

• Gramineae (10/19)

Sources of host-range data

Thouvenel et al. (1976); Lamy et al. (1979); Kukla et al. (1984).

Physical and biochemical properties

Properties of particles in sap

TIP: 50-55 °C. LIV: 1 days. DEP: log₁₀ minus 2-3. Infectivity of sap not changed by treatment with di-ethyl ether. Leaf sap contains few virions.

Purification method

Thouvenel et al. (1976).

Particle morphology

Virions filamentous; not enveloped; usually flexuous (virions straighter in 50mM MgCl₂); with a clear modal length; of 815 nm; 15 nm wide. Axial canal obscure. Basic helix obscure.

Physical properties

Isoelectric point pH 4.7 (strains A and D), or 5.3 (strain B).

Biochemical properties

Virions contain 6 % nucleic acid; 94 % protein; 0 % lipid.

Genome consists of RNA; single-stranded. Infectivity retained when deproteinised with phenol or detergent.

Features of proteins

Virion protein(s) one; M_r 32500 (strains A and D), or 34500 (strain B).

Cytopathology

Virions found in all parts of the host plant; in cytoplasm. Inclusions present in infected cells; are pinwheels; they do not contain virions.

Taxonomy and relationships

Potyvirus: Potyviridae

Virus(es) with serologically related virions

Pepper veinal mottle and yam mosaic viruses.

Virus(es) with serologically unrelated virions

Sugarcane mosaic and maize dwarf mosaic strains A and B.

Differences between type strain and others

Specific diagnostic hosts for identification of strain B (maize strain) are Avena fatua, A. paniculata, A. strigosa, Bromus macrostachys, Eleusine coracana, E. tocusa, Lolium multiflorum, Panicum capillare, Sorghum vulgare.

Comments and References

References

• Kukla, B., Thouvenel, J.C. and Fauquet, C. (1984). Phytopath. Z. 109: 65.
• Lamy, D., Thouvenel, J.C. and Fauquet, C. (1979). Ann. appl. Biol. 93: 37.
• Morales, F.J., Castano, M., Velasco, A.C. and Arroyave, J. (1994). Plant Dis. 78: 425.
• Thouvenel, J.C., Givord, L. and Pfeiffer, P. (1976). Phytopathology 66: 954.
• Thouvenel, J.C., Fauquet, C. and Lamy, D. (1978). CMI/AAB Descr. Pl. Viruses No. 190, 3 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.