Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Melon rugose mosaic tymovirus

Index

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

Data collated by P. Jones, 1984. Revised 1989.

Nomenclature

ICTV decimal code

77.0.1.T.DE.1

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Citrullus lanatus - yellowing, rugose mosaic.
• Cucumis melo - severe mosaic and rugosity.

Transmission

Virus transmitted by mechanical inoculation; not transmitted by seed.

Geographical distribution

Spreads in Yemen.

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Citrullus lanatus, Cucumis melo, C. sativus, Cucurbita pepo - systemic mosaic.

Diagnostically insusceptible host species

Chenopodium amaranticolor, Brassica campestris ssp. chinensis, Datura stramonium, Nicotiana clevelandii, N. tabacum cv. Xanthi-nc.

Maintenance and propagation hosts

Citrullus lanatus, Cucumis melo.

Assay hosts (Local lesions or Whole plants)

Citrullus lanatus (W), Cucumis melo (W), C. sativus (W), Cucurbita pepo (W).

Susceptible host species

• Citrullus lanatus
• Cucumis melo
• Cucumis sativus
• Cucurbita pepo

Insusceptible host species

• Brassica campestris ssp. chinensis
• Chenopodium amaranticolor
• Datura stramonium
• Nicotiana clevelandii
• Nicotiana tabacum

Families containing susceptible hosts

• Cucurbitaceae (4/4)

Families containing insusceptible hosts

• Chenopodiaceae (1/1)
• Cruciferae (1/1)
• Solanaceae (3/3)

Sources of host-range data

Jones et al. (1986).

Physical and biochemical properties

Properties of particles in sap

TIP: 55-60 °C. LIV: 21 days (or more). DEP: log₁₀ minus 6. Leaf sap contains many virions.

Purification method

Jones et al. (1986).

Particle morphology

Virions isometric; not enveloped; 32 nm in diameter; rounded in profile, or angular in profile.

Physical properties

Two sedimenting components in purified preparations; sedimentation coefficient of the fastest 118 S; of the other(s) 64 S. Density 1.39 g cm^-3 in CsCl.

Biochemical properties

Virions contain 23 % nucleic acid (B); 77 % protein (B); 0 % lipid.

Genome consists of RNA; single-stranded; linear. Total genome size 2.1 kb. Genome unipartite; largest (or only) genome part 2.1 kb.

Features of proteins

Virion protein(s) one; M_r 22000; coat protein.

Replication

Replication does not depend on a helper virus.

Taxonomy and relationships

Tymovirus

Virus(es) with serologically related virions

Belladonna mottle, dulcamara mottle, Scrophularia mottle and Andean potato latent viruses, but distantly.

Best tests for diagnosis

Mechanical inoculation to watermelon, sweetmelon and squash.

Comments and References

References

• Jones, P. (1981). Ann. Rep. Rothamsted Exp. Stn.
• Jones, P., Ba Angood S. and Carpenter J.M. (1986). Ann. appl. Biol. 108: 303.

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.