Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Citrus ringspot virus

Index

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

Data collated by K.S. Derrick, 1989.

Nomenclature

Synonyms

citrus psorosis virus complex - A and B (Whiteside et al., 1988; da Graca et al., 1991).

ICTV decimal code

79.0.P.DE.15

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Citrus sp. - epinasty, chlorotic flecks, leaf mottling, ringspots or large, irregular chlorotic patterns on mature leaves.

Transmission

Possibly by a vector as, in Argentina spread is not related to grafting. Virus transmitted by mechanical inoculation; transmitted by grafting.

Ecology and control

Studies reported by in Compendium of Citrus Diseases (1988).

Geographical distribution

Spreads in Argentina (controlled by using virus-free budwood).

Experimental host range

Several (3-9) families susceptible. Experimentally infected plants mostly show systemic mosaics, mottles, ringspots or necrosis.

Diagnostically susceptible host species and symptoms

• Chenopodium quinoa, Phaseolus vulgaris cv. Red Kidney - local lesions.
• Zinnia elegans cv. Thembelina - symptomless.

Maintenance and propagation hosts

Citrus sp.

Assay hosts (Local lesions or Whole plants)

Chenopodium quinoa (L), Phaseolus vulgaris (L).

Susceptible host species

• Catharanthus roseus
• Chenopodium amaranticolor
• Chenopodium quinoa
• Citrus aurantifolia
• Citrus aurantium
• Citrus limon
• Citrus medica
• Citrus paradisi
• Citrus sinensis
• Crotalaria spectabilis
• Cucumis sativus
• Gomphrena globosa
• Helianthus annuus
• Nicotiana benthamiana
• Nicotiana clevelandii
• Nicotiana megalosiphon
• Nicotiana rustica
• Nicotiana tabacum
• Petunia × hybrida
• Phaseolus vulgaris
• Pisum sativum
• Poncirus trifoliata
• Sesamum indicum
• Zinnia elegans

Families containing susceptible hosts

• Amaranthaceae (1/1)
• Apocynaceae (1/1)
• Chenopodiaceae (2/2)
• Compositae (2/2)
• Cucurbitaceae (1/1)
• Leguminosae-Papilionoideae (3/3)
• Pedaliaceae (1/1)
• Rutaceae (7/7)
• Solanaceae (6 /6)

Sources of host-range data

Timmer et al. (1978).

Physical and biochemical properties

Properties of particles in sap

LIV: 2 days (at 4ºC). DEP: log₁₀ minus 2. Infectivity of sap decreased by treatment with di-ethyl ether. Leaf sap contains few virions.

Purification method

Derrick et al. (1988).

Particle morphology

Virions filamentous; they vary in length; not enveloped; usually flexuous (extremely); of 300-500 nm, or 1500-2500 nm; c. 8-10 nm wide.

Physical properties

Two sedimenting components in purified preparations.

Biochemical properties

Genome probably consists of RNA; single-stranded; of two parts.

Features of proteins

Virion protein(s) one; M_r 48000; probably coat protein. Method of preparation: Derrick et al. (1988).

Cytopathology

Virions found in leaves (isolated from leaf tissue).

Taxonomy and relationships

(ungrouped)

Best tests for diagnosis

See Derrick et al. (1988).

Comments and References

References

• Compendium of Citrus Diseases (1988). Amer. Phytopath. Soc.. Eds J.O. Whiteside, S.M. Garnsey and L.W. Timmer. APS Press.
• Da Graca, J.V., Lee, R.F., Moreno, P., Civerolo, E.L. and Derrick, K.S. (1991). Plant Dis. 75: 613.
• Derrick, K.S., Brlansky, R.H., Da Graca, J.V., Lee, R.F., Timmer, L.W. and Nguyen, T.K. (1988). Phytopathology 78: 1298.
• Derrick, K.S., Lee, R.F., Hewitt, B.G., Barthe, G.A. and Da Graca, J.V. (1991). Proc. 11th Conf. Int. Org. Citrus Virol.
• Fawcett, H.S. (1933). Phytopathology 23: 930.
• Swingle, W.T. and Webber, H.J. (1896). U.S. Dep. Agr. Div. Veg. Phys. Path. Bull. 8: 42 pp.
• Timmer, L.W., Garnsey, S.M. and McRitchie, J.J. (1978). Pl. Dis. Reptr 62: 1054.
• Wallace, J.M. and Drake, R.J. (1968). Proc. 4th Conf. Int. Org. Citrus Virol. Ed. J.F.L. Childs. Florida Press, Gainesville, Florida, U.S.A..
• Whiteside, J.O., Garnsey, S.M. and Timmer, L.W. (1988). In: Compendium Citrus Diseases, pp. 88. Amer. Phytopath. Soc., St. Paul, Minnesota, U.S.A.

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.