Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Maize dwarf mosaic potyvirus

Index

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

Data collated by A.J. Gibbs, 1990.

Nomenclature

Synonyms

MDMV-A, MDMV-D, MDMV-E, MDMV-F.

Acronym

MDMV

ICTV decimal code

57.0.1.0.039

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Sorghum halepense - mosaic.
• Zea mays - mosaic, stunting.

Transmission

Transmitted by a vector; an insect; several species; Aphididae. Transmitted in a non-persistent manner. Virus transmitted by mechanical inoculation; not transmitted by contact between plants; transmitted by seed (maize); not transmitted by pollen.

Geographical distribution

Spreads in China, South Africa, and the USA.

Experimental host range

Several (3-9) families susceptible.

Diagnostically susceptible host species and symptoms

• Panicum miliaceum, Zea mays - mosaic, reddening and dwarfing.
• Sorghum halepense, S. bicolor - mosaic.

Diagnostically insusceptible host species

Setaria adhaerans, Hordeum vulgare, Saccharum officinarum (some cultivars).

Maintenance and propagation hosts

Zea mays (sweet corn).

Assay hosts (Local lesions or Whole plants)

Zea mays (sweet corn) (W).

Susceptible host species

• Arundo donax
• Bromus mollis
• Bromus secalinus
• Bromus tectorum
• Chloris gayana
• Cynodon dactylon
• Echinochloa crus-galli
• Eleusine coracana
• Lagurus ovatus
• Oryza sativa
• Panicum capillare
• Panicum maximum
• Panicum miliaceum
• Paspalum dilatatum
• Phalaris paradoxa
• Rottboellia exaltata
• Saccharum officinarum
• Sacciolepis indica
• Setaria italica
• Setaria viridis
• Sorghum bicolor
• Sorghum halepense
• Zea mays

Insusceptible host species

• Anthoxanthum odoratum
• Avena sativa
• Dactylis glomerata
• Hordeum vulgare
• Lolium perenne
• Lolium temulentum
• Poa pratensis
• Saccharum officinarum
• Secale cereale
• Setaria adhaerans
• Triticum aestivum

Families containing susceptible hosts

• Gramineae (23/33)

Families containing insusceptible hosts

• Gramineae (11/33)

Comments on host-range

Differential hosts for different isolates recorded by Rosenkranz (1987).

Sources of host-range data

Rosenkranz (1987).

Physical and biochemical properties

Properties of particles in sap

TIP: 56 °C. LIV: 1-2 days. DEP: log₁₀ minus 2-4. Infectivity of sap not changed by treatment with di-ethyl ether. Leaf sap contains few virions.

Purification method

Shukla et al. (1989a).

Particle morphology

Virions filamentous; not enveloped; usually flexuous; with a clear modal length; of 770 nm.

NCBI sequence data (Entrez search)

Sequence database accession code(s)

• D00949 Em(40)_vi:MDMCP Gb(84)_vi:MDMCP Maize dwarf mosaic virus gene for coat protein, 3´-terminal region. 2/93 1,377bp.
• S77088 Gb(90)_un:S77088 polyprotein <3' region> (maize dwarf mosaic virus MDMV, Genomic RNA, 1279 nt). 7/95 1,279bp.
• U07216 Em(40)_vi:MD07216 Gb(84)_vi:MDU07216 Maize dwarf mosaic virus MDMV-A polyprotein (nuclear inclusion II protein, coat protein) gene 2 sequences.

Cytopathology

Virions found in leaves, mesophyll and all parts of the host plant; in cytoplasm. Inclusions present in infected cells; are pinwheels and unusual in shape; bundles, scrolls and tubes; type I inclusions (Edwardson, 1974); they do not contain virions.

Taxonomy and relationships

Potyvirus: Potyviridae

Additional comments on relationships

This virus is one of a complex of potyviruses infecting tropical grasses. These have been shown by immunoblot and virion protein sequencing to be isolates of four species; maize dwarf mosaic, sugarcane mosaic, sorghum mosaic and Johnson grass mosaic. For details check the descriptions of the other three species (Shukla et al., 1989).

Comments and References

References

• Dale, J.L. (1965). Pl. Dis. Reptr 49: 202.
• Edwardson, J.R. (1974). Fla Agric. Exp. Stn Monog. No. 4.
• Ford, R.E., Tosic, M. and Shukla, D.D. (1989). CMI/AAB Descr. Pl. Viruses No. 341, 5 pp.
• Rosenkranz, E. (1980). Phytopathology 70: 1056.
• Rosenkranz, E. (1987). Phytopathology 77: 598.
• Shukla, D.D., Tosic, M., Jilka, J., Ford, R.E., Toler, R.W. and Langham, M.A.C. (1989). Phytopathology 79: 223.
• Williams, L.E. and Alexander, L.J. (1965). Phytopathology 55: 802.

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.