Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Maize Iranian mosaic (?) nucleorhabdovirus

Index

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

Data collated by K. Izadpanah, 1991.

Nomenclature

Synonyms

Iranian Shiraz maize mosaic virus.

ICTV decimal code

62.0.5.T.D.08

Host range and symptoms

Natural host range and symptoms

Symptoms persist. Symptoms fine chlorotic striping on veins.
• Echinochloa spp. - chlorotic streaking.
• Sorghum sudanense - reddish striping of leaves.
• Zea mays - fine chlorotic or necrotic striping on leaf and sheath veins, stunting and ear abortion wehen infected early.

Transmission

Transmitted by a vector; an insect; Unkanodes tanasijevici, Laodelphax striatellus, Peregrinus maidis; Delphacidae. Principal natural vector(s): Unkanodes tanasijevici, Laodelphax striatellus. Not transmitted by a number of aphid and cicadellid species. Transmitted in a persistent manner. Virus retained when the vector moults; multiplies in the vector; not transmitted by mechanical inoculation; not transmitted by contact between plants; not transmitted by seed.

Ecology and control

Studies reported by crops planted late avoid infection (Izadpanah, 1991).

Geographical distribution

Spreads in Iran.

Experimental host range

Few (<3) families susceptible. Experimentally infected plants mostly show chlorotic leaf streaking, mosaic.

Diagnostically susceptible host species and symptoms

• Echinochloa sp., Hordeum vulgare, Sorghum sudanense, Zea mays - chlorotic striping.

Maintenance and propagation hosts

Zea mays.

Assay hosts (Local lesions or Whole plants)

Zea mays (W).

Susceptible host species

• Echinochloa
• Hordeum vulgare
• Sorghum sudanense
• Zea mays

Families containing susceptible hosts

• Gramineae (4/4)

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains few virions. Electron microscopy: PTA and UA.

Purification method

Izadpanah (1989).

Particle morphology

Virions rhabdo- or bullet-shaped; enveloped; usually straight; of 180 nm; 80 nm wide. Basic helix obscure.

Physical properties

Two sedimenting components in purified preparations.

Features of proteins

Virion protein(s) six; proteins G, L, N, NS, M1 and M2 have been reported (Gomez-Luengo and Gordon, 1987). Virion proteins glycosylated.

Cytopathology

Virions found in leaves, mesophyll, epidermis, vascular parenchyma and phloem (Ammar et al., 1987); in cytoplasm and in the perinuclear space. Other cellular changes: enlargement of nucleoli, vesiculation of the cytoplasm, tubular structures and degeneration of chloroplasts (Ammar et al., 1987).

Taxonomy and relationships

Possible Nucleorhabdovirus: Rhabdoviridae

Virus(es) with serologically unrelated virions

Barley yellow striate mosaic, cereal chlorotic mottle, cynodon chlorotic streak, maize mosaic, maize sterile stunt, festuca leaf streak, Moroccan wheat, northern cereal mosaic, wheat chlorotic streak and wheat rosette stunt viruses.

Best tests for diagnosis

Iranian maize mosaic (IMMV) and maize rough dwarf (MRDV) viruses are often found together in the same field and sometimes the same plant. MRDV induces small galls on the leaf veins, whereas IMMV induces chlorotic streaks. Also, sugarcane mosaic virus may occur in the same field but it produces mosaics.

Comments and References

References

• Ammar, E.D., Gomez-Luengo, R.G. and Gordon, D.T. (1987). Phytopathology 77:; 1732.
• Gomez-Luengo, R.G. and Gordon, D.T. (1987). Phytopathology 77: 1705.
• Izadpanah, K. (1989). J. Phytopath. 126: 43.
• Izadpanah, K. (1991). J. Phytopath. 131: 290.
• Izadpanah, K. and Parvin, S. (1979). Iran. J. Pl. Path. 15: 53.
• Izadpanah, K., Ahmadi, A.A., Parvin, S. and Jafari, S.A. (1983). J. Phytopath. 107: 283.
• Milne, R.G., Masenga, V. and Conti, M. (1986). Intervirology 25: 83.
• Nault, L.R. and Ammar, E.D. (1989). Ann. Rev. Ent. 34: 503.

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.