Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Cassava Colombian symptomless (?) potexvirus

Index

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

Data collated by A.A. Brunt, 1990.

Nomenclature

ICTV decimal code

56.0.1.T.D.03

Host range and symptoms

Natural host range and symptoms

• Manihot esculenta - systemic, but symptomless.

Transmission

Virus transmitted by mechanical inoculation.

Geographical distribution

Spreads in Colombia.

Diagnostically susceptible host species and symptoms

• Chenopodium spp., Nicotiana benthamiana - symptomless, not systemic.

Susceptible host species

• Chenopodium
• Manihot esculenta
• Nicotiana benthamiana

Families containing susceptible hosts

• Chenopodiaceae (1/1)
• Euphorbiaceae (1/1)
• Solanaceae (1/1)

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains few virions.

Particle morphology

Virions filamentous; with a clear modal length; of 460 nm; 13 nm wide.

Features of proteins

Virion protein(s) one; M_r 26000; coat protein.

Taxonomy and relationships

Possible Potexvirus

Virus(es) with serologically related virions

Narcissus mosaic virus, but only distantly related to cassava common mosaic and cassava X potexviruses.

Virus(es) with serologically unrelated virions

Nine other potexviruses (Aiton and Harrison, 1988).

Best tests for diagnosis

This virus sometimes occurs with cassava X potexvirus or in plants with frogskin or Caribbean mosaic symptoms but apparently is not the cause of these diseases.

Comments and References

References

• Aiton, M.M. and Harrison, B.D. (1988). Rep. Scottish Crop Res. Inst. 1987, p. 192.
• Lennon, A.M., Aiton, M.M. and Harrison, B.D. (1987). Rep. Scottish Crop Res. Inst. 1986, p. 181.

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.