Plant Viruses
Online 
Descriptions and Lists from
the VIDE Database
Cassava green
mottle nepovirus
Index
Data collated by A.M. Lennon, M.M. Aiton and B.D.
Harrison, 1986.
Nomenclature
Acronym
ICTV decimal code
Host range and symptoms
First reported
in Manihot esculenta; from in a sample from the Solomon Islands examined
in Scotland; by Lennon et al. (1985).
Natural host range and symptoms
Symptoms disappear soon
after infection.
- Manihot esculenta - leaf mottling.
Transmission
Transmitted by means not involving a vector.
Virus transmitted by mechanical inoculation.
Geographical
distribution
Spreads in the Pacific region; the Solomon Islands.
Experimental host range
Many (>9) families
susceptible. Experimentally infected plants mostly show mottles, both in
inoculated and other leaves, mosaic.
Diagnostically
susceptible host species and symptoms
- Manihot esculenta
- local and systemic mottle.
- Chenopodium quinoa - necrotic
local lesions; systemic necrosis.
- Nicotiana clevelandii - necrotic
and systemic spots.
- Phaseolus vulgaris, Cucumis sativus - systemic
mottling.
- Ricinus communis - necrotic local lesions, mosaic.
- Ipomoea batatas - symptomless systemic infection.
- Solanum
tuberosum - local and systemic black necrotic spots.
Diagnostically insusceptible host species
Zea mays,
Arachis hypogaea, Hordeum vulgare, Triticum aestivum, Brassica oleracea.
Maintenance and propagation hosts
Assay hosts (Local lesions or
Whole plants)
Chenopodium quinoa (L),
Chenopodium amaranticolor (L).
Susceptible host species
Insusceptible host species
Families containing susceptible hosts
Families containing
insusceptible hosts
Physical and
biochemical properties
Properties of particles in sap
TIP:
60-65 °C. LIV: 12 days (or more). DEP: log10 minus 5-6. Infectivity of sap
not changed by treatment with di-ethyl ether. Leaf sap contains few virions.
Particle morphology
Virions isometric; not enveloped; 27
nm in diameter; rounded in profile, or angular in profile; without a conspicuous
capsomere arrangement.
Physical properties
Two sedimenting components in
purified preparations, or three sedimenting components in purified preparations.
A260/A280 ratio 1.8-1.9 (uncorrected).
Biochemical properties
Genome consists of RNA;
single-stranded; linear. Total genome size 16.9 kb. Genome of two parts;
largest (or only) genome part the larger 9.5 kb; the 2nd largest 7.4 kb.
Infectivity retained when deproteinised with phenol or detergent.
Features of proteins
Virion protein(s) one (or more);
Mr 53000.
Replication
Replication does not depend on a helper
virus.
Cytopathology
Virions found in all parts of the host
plant; in cytoplasm. Inclusions present in infected cells; are unusual in shape.
Other cellular changes: the virus occasionally being found in tubules.
Taxonomy and
relationships
Virus(es) with serologically unrelated virions
Arabis mosaic, arracacha A, artichoke Italian latent, artichoke
vein-banding, cherry leaf roll, cacao necrosis, grapevine Bulgarian latent,
grapevine fanleaf, grapevine Hungarian chrome mosaic, hibiscus latent ringspot,
lucerne Australian latent, mulberry ringspot, olive latent ringspot, peach
rosette mosaic, potato black ringspot, potato U, raspberry ringspot, strawberry
latent ringspot, tobacco ringspot, tomato black ring, tomato necrosis and tomato
ringspot viruses.
Comments and
References
References
- Lennon, A.M., Aiton,
M.M. and Harrison, B.D. (1987). Ann. appl. Biol. 10: 545.
- Lennon, A.M., Aiton, M.M. and Harrison, B.D. (1985). Rep. Scottish Crop
Res. Inst. 1985, p. 167.
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: 20th August 1996.' URL
http://biology.anu.edu.au/Groups/MES/vide/
Dallwitz (1980)
and
Dallwitz, Paine and Zurcher (1993)
should also be cited.
Please send comments, corrections and suggestions to:
vide-manager@biology.anu.edu.au