Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Johnsongrass chlorotic stripe (?) carmovirus

Index

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

Data collated by W. Huth, 1991; K. Izadpanah, 1992.

Nomenclature

ICTV decimal code

74.0.2.T.DE.1

Host range and symptoms

Natural host range and symptoms

Symptoms persist. Symptoms stripe mosaic.

Sorghum halepense - chlorotic leaf stripes, dwarfing, fewer seeds.

Transmission

Transmitted by means not involving a vector. Not transmitted by Empoasca spp., Laodelphax striatellus, Neoaliturus haematoceps, Unkanodes tanasijevici, Eriophyes tulipae or Rhopalosiphum spp. Virus not transmitted by mechanical inoculation; not transmitted by contact between plants; not transmitted by seed (although present in the cotyledon).

Geographical distribution

Spreads in Iran.

Susceptible host species

• Sorghum halepense

Families containing susceptible hosts

• Gramineae (1/1)

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains many virions.

Purification method

Izadpanah (1988).

Particle morphology

Virions isometric; not enveloped; 30 nm in diameter; rounded in profile (with a knobby surface); with a conspicuous capsomere arrangement.

Physical properties

One sedimenting component in purified preparations (with a minor second component). Density 1.359 g cm^-3 in CsCl. A₂₆₀/A₂₈₀ ratio 1.48.

Biochemical properties

Genome consists of RNA; single-stranded; linear. Total genome size 4.65 kb. Genome unipartite; largest (or only) genome part 4.65 kb. Base composition 27.5 % G; 23.5 % A; 26 % C; 23 % U.

Features of proteins

Virion protein(s) one; M_r 41000; coat protein. Method of preparation: Izadpanah et al. (1992).

Cytopathology

Virions found in leaves and mesophyll; in cytoplasm, in chloroplasts, in mitochondria, and in cell vacuoles. Inclusions absent from infected cells. Other cellular changes: swollen endoplasmic reticulum or nuclear envelope containing fibrils and vesicles.

Taxonomy and relationships

Possible Carmovirus: Tombusviridae

Additional comments on relationships

No serological relationship to any of 30 isometric viruses tested.

Best tests for diagnosis

JGCSMV and sugarcane mosaic potyvirus infect Johnson grass in the Fras Province of Iran. JGCSMV induces more obvious symptoms.

Comments and References

References

• Izadpanah, K. (1982). Iran J. Pl. Path. 18: 3-7.
• Izadpanah, K. (1988). J. Phytopathology 121: 209.
• Izadpanah, K., Huth, W., Lesemann, D.-E. and Vetten H.J. (1992). J. Phytopathology 137: 105.

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.