Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Clover yellows closterovirus

Index

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

Data collated by S.T. Ohki, 1981. Revised 1984.

Nomenclature

Acronym

CYV

ICTV decimal code

17.0.1.DE.02

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Trifolium repens, T. incarnatum - yellowing or reddening.

Transmission

Transmitted by a vector; an insect; Aphis craccivora; Aphididae. Transmitted in a semi-persistent manner. Virus not transmitted by mechanical inoculation; not transmitted by contact between plants.

Geographical distribution

Spreads in Japan.

Experimental host range

Few (<3) families susceptible. Experimentally infected plants mostly show yellowing, reddening.

Diagnostically susceptible host species and symptoms

• Pisum sativum, Vicia faba - systemic yellowing.

Maintenance and propagation hosts

Pisum sativum, Vicia faba.

Assay hosts (Local lesions or Whole plants)

Pisum sativum, Vicia faba.

Susceptible host species

• Pisum sativum
• Trifolium incarnatum
• Trifolium repens
• Vicia faba

Insusceptible host species

• Beta vulgaris
• Chenopodium amaranticolor
• Gomphrena globosa
• Nicotiana glutinosa
• Nicotiana tabacum
• Vicia faba
• Vigna unguiculata

Families containing susceptible hosts

• Leguminosae-Papilionoideae (4/5)

Families containing insusceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (2/2)
• Leguminosae-Papilionoideae (2/5)
• Solanaceae (2/2)

Sources of host-range data

Ohki et al. (1976).

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains few virions.

Particle morphology

Virions filamentous; not enveloped; usually flexuous; with a clear modal length; of 1700 nm; 12 nm wide. Axial canal obscure. Basic helix obvious; pitch of basic helix 3.7 nm.

Cytopathology

Virions found in phloem; in cytoplasm. Inclusions present in infected cells; are unusual in shape; banded bodies and containing vesicles fibril; they contain virions. Other cellular changes: necrosis and vesicles in phloem cells.

Taxonomy and relationships

Closterovirus

Comments and References

References

• Ohki, S.T., Doi, Y. and Yora, K. (1976). Ann. Phytopath. Soc. Japan 42: 313.

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.