Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Tobacco yellow dwarf monogeminivirus

Index

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

Data collated by J.E. Thomas, 1980. Revised 1984.

Nomenclature

Synonyms

bean summer death virus.

Acronym

TYDV

ICTV decimal code

29.0.1.0.011

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Nicotiana tabacum - downcurling of tips and margins of younger leaves, general chlorosis.
• Datura stramonium, D. tatula, Lycopersicon esculentum - symptomless.

Transmission

Transmitted by a vector; an insect; Orosius argentatus; Cicadellidae. Transmitted in a persistent manner. Virus retained when the vector moults; not transmitted by mechanical inoculation; transmitted by grafting (between solanaceous hosts); not transmitted by seed.

Geographical distribution

Spreads in Australia.

Experimental host range

Several (3-9) families susceptible.

Diagnostically susceptible host species and symptoms

• Phaseolus vulgaris cv. Spartan Arrow, Datura stramonium, Nicotiana tabacum - systemic leaf yellowing.

Maintenance and propagation hosts

Datura stramonium, Lycopersicon esculentum cv. Grosse Lisse, Nicotiana tabacum.

Assay hosts (Local lesions or Whole plants)

Phaseolus vulgaris cv. Spartan Arrow (W).

Susceptible host species

• Beta vulgaris
• Datura stramonium
• Datura tatula
• Lycopersicon esculentum
• Medicago sativa
• Nicotiana glutinosa
• Nicotiana rustica
• Nicotiana tabacum
• Phaseolus vulgaris
• Solanum nigrum
• Sonchus oleraceus
• Trifolium repens

Insusceptible host species

• Cucumis sativus
• Macroptilium lathyroides
• Nicotiana debneyi
• Solanum tuberosum
• Vigna radiata

Families containing susceptible hosts

• Chenopodiaceae (1/1)
• Compositae (1/1)
• Leguminosae-Papilionoideae (3/5)
• Solanaceae (7/9)

Families containing insusceptible hosts

• Cucurbitaceae (1/1)
• Leguminosae-Papilionoideae (2/5)
• Solanaceae (2/9)

Sources of host-range data

Hill (1950); Helson (1950); Hill and Mandryk (1954); Thornberry (1966); Bowyer and Atherton (1972).

Physical and biochemical properties

Properties of particles in sap

TIP: 50-60 °C (determined by feeding leafhoppers through membranes on virus-containing extracts). LIV: 26 days (in bean tissue stored at -18ºC and in purified preparations stored at 4ºC). DEP: log₁₀ minus 2-4. Leaf sap contains few virions.

Purification method

Thomas and Bowyer (1980).

Particle morphology

Virions geminate; not enveloped; 18 nm in diameter; 35 nm in length.

Physical properties

One sedimenting component in purified preparations; sedimentation coefficient 76 S.

Biochemical properties

Genome consists of DNA; single-stranded; circular. Total genome size 2.8 kb. Genome unipartite; largest (or only) genome part 2.8 kb.

NCBI sequence data (Entrez search)

Sequence database accession code(s)

• M81103 Em(40)_vi:GETYDMONO Gb(84)_vi:TYDMONOCOT Tobacco yellow dwarf virus gene, complete cds. 2/94 2,580bp. 1 sequence.

Features of proteins

Virion protein(s) one; M_r 27500; coat protein. Method of preparation: Thomas and Bowyer (1980).

Replication

Replication does not depend on a helper virus.

Cytopathology

Virions found in phloem. Inclusions absent from infected cells. Other cellular changes: necrosis of phloem, especially in sieve tubes.

Taxonomy and relationships

monogeminivirus: Geminiviridae

Comments and References

References

• Ballantyne, B. (1968). Agric. Gaz. N.S.W. 79: 486.
• Bowyer, J.W. and Atherton, J.G. (1972). Phytopathology 61: 1451.
• Helson, G.A.H. (1950). Aust. J. agric. Res. 1: 144.
• Hill, A.V. (1937). J. Coun. Scient. Ind. Res. Aust. 10: 228.
• Hill, A.V. (1950). Aust. J. agric. Res. 1: 141.
• Hill, A.V. and Mandryk, M. (1954). Aust. J. agric. Res. 5: 617.
• Thomas, J.E. and Bowyer, J.W. (1980). Phytopathology 70: 214.
• Thomas, J.E. and Bowyer, J.W. (1984). CMI/AAB Descr. Pl. Viruses No. 278, 4 pp.
• Thornberry, H.H. (1966). In: Index of Plant Virus Diseases. U.S. Dep. Agric. Hdbk No. 307.

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.