Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Carrot temperate 4 alphacryptovirus

Index

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

Data collated by A.A. Brunt, 1991.

Nomenclature

Acronym

CTeV-4

ICTV decimal code

49.0.3.0.009

Host range and symptoms

Natural host range and symptoms

• Daucus carota - symptomless infection.

Transmission

Virus not transmitted by mechanical inoculation; not transmitted by grafting; transmitted by seed.

Geographical distribution

Found, but with no evidence of spread, in Japan.

Susceptible host species

• Daucus carota

Families containing susceptible hosts

• Umbelliferae (1/1)

Physical and biochemical properties

Particle morphology

Virions isometric; 30 nm in diameter.

Biochemical properties

Genome consists of RNA; double-stranded. Total genome size 3.75 kb (pairs). Genome of two parts; largest (or only) genome part the larger 1.95 kb (pairs); the 2nd largest 1.8 kb (pairs).

Taxonomy and relationships

Alphacryptovirus: Partitiviridae

Additional comments on relationships

The viral dsRNA showed no significant homology with those of carrot temperate 1, 2 and 3 cryptoviruses.

Best tests for diagnosis

The virus often occurs in mixed infections with other carrot temperate cryptoviruses.

Comments and References

References

• Natsuaki, T., Muroi, Y., Okuda, S. and Teranaka, M. (1990). Ann. Phytopath. Soc. Japan 56: 354.

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.