Plant Viruses
Online 
Descriptions and Lists from
the VIDE Database
Desmodium yellow
mottle tymovirus
Index
Data collated by H.A. Scott, 1980. Revised 1984.
Nomenclature
Acronym
ICTV decimal code
Host range and symptoms
First reported
in Desmodium laevigatum and D. paniculatum; from Arkansas, U.S.A;
by Walters and Scott (1968).
Natural host range and symptoms
Symptoms persist.
- Desmodium laevigatum, D. paniculatum - yellow mottle and leaf
malformation.
Transmission
Virus transmitted by mechanical inoculation.
Geographical distribution
Experimental host range
Few (<3) families susceptible
(only Leguminosae infected).
Diagnostically susceptible host
species and symptoms
- Desmodium tortuosum - necrotic
local lesions.
- Phaseolus vulgaris cvs Black Valentine, Bountiful,
Pinto - local lesions.
- P. vulgaris cv. Great Northern,
- Vigna unguiculata cv. Monarch - systemic mottle.
Diagnostically insusceptible host species
Phaseolus
vulgaris cvs Red Kidney, Small White.
Maintenance and propagation
hosts
Phaseolus vulgaris cv. Great Northern.
Assay
hosts (Local lesions or Whole plants)
Susceptible host species
Insusceptible host species
Families containing susceptible hosts
Families
containing insusceptible hosts
Sources of host-range data
Walters
and Scott (1972).
Physical and
biochemical properties
Properties of particles in sap
TIP: 70
°C. LIV: 38 days. DEP: log10 minus 7. Leaf sap contains many virions.
Purification method
Walters and
Scott (1972).
Particle morphology
Virions isometric; not enveloped; 30
nm in diameter; rounded in profile; with a conspicuous capsomere arrangement.
Physical properties
Two sedimenting components in
purified preparations; sedimentation coefficient of the fastest 114 S
(B); of the other(s) 54 S (T).
Biochemical properties
Virions contain 35 % nucleic acid
(B); 65 % protein (B); 0 % lipid.
Genome consists of RNA; single-stranded; linear. Total genome size 6.3
kb. Genome unipartite; largest (or only) genome part 6.3 kb. Base composition
16.5 % G; 22.5 % A; 37.2 % C; 23.8 % U. Infectivity retained when deproteinised
with phenol or detergent.
Replication
Replication does not depend on a helper
virus.
Cytopathology
Virions found in leaves; in cytoplasm, in
nuclei, and in cell vacuoles. Inclusions present in infected cells; are crystals
in the cytoplasm, crystals in the nucleus, and unusual in shape; crystals in the
vacuole; they contain virions. Other cellular changes: vesicles in the
peripheries of chloroplasts opening to cytoplasm.
Taxonomy and
relationships
Virus(es) with serologically related virions
Kennedya yellow mosaic, okra mosaic, cocoa yellow mosaic and clitoria
yellow vein viruses are related closely; turnip yellow mosaic, Andean potato
latent, dulcamara mottle, ononis yellow mosaic, scrophularia mottle and wild
cucumber mosaic viruses are distantly related.
Comments and
References
References
- Koenig, R. (1976).
Virology 72: 1.
- Koenig, R. and Givord, L. (1974).
Virology 58: 119.
- Scott, H.A. (1976). CMI/AAB Descr. Pl.
Viruses No. 168, 3 pp.
- Scott, H.A. and Moore, B.J. (1972).
Virology 50: 613.
- Walters, H.J. and Scott, H.A. (1972).
Phytopathology 62: 125.
- Walters, H.J. and Scott, H.A. (1968).
Phytopathology 58: 1071.
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