Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Alfalfa 1 alphacryptovirus

Index

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

Data collated by G.P. Accotto, 1991.

Nomenclature

Synonyms

alfalfa temperate virus (in part).

Acronym

ACV-1

ICTV decimal code

49.0.3.0.002

Host range and symptoms

Natural host range and symptoms

• Medicago sativa - symptomless.

Transmission

Transmitted by means not involving a vector. Virus not transmitted by mechanical inoculation; not transmitted by grafting; not transmitted by contact between plants; transmitted by seed; transmitted by pollen to the seed.

Geographical distribution

Spreads in the Eurasian region and the Middle East. Found, but with no evidence of spread, in the Eurasian region, the Middle East and Japan.

Maintenance and propagation hosts

Medicago sativa.

Susceptible host species

• Medicago sativa

Families containing susceptible hosts

• Leguminosae-Papilionoideae (1/1)

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains few virions.

Purification method

Accotto et al. (1990).

Particle morphology

Virions isometric; not enveloped; 30 nm in diameter; rounded in profile; without a conspicuous capsomere arrangement.

Physical properties

One sedimenting component in purified preparations. Density 1.34-1.35 g cm^-3 in CsCl.

Biochemical properties

Genome consists of RNA; double-stranded; linear. Total genome size 3.67 kb (pairs). Genome of two parts; largest (or only) genome part the larger 1.9 kb (pairs); the 2nd largest 1.77 kb (pairs). Genomic nucleic acid isolated by phenol/chloroform extraction in the presence of 0.5% SDS.

Features of proteins

Virion protein(s) two; M_r of the larger 67000; P1 protein - possible RNA-dependent RNA polymerase, obtained from in vitro translation of the large RNA segment. M_r of 2nd largest 53000; P2 coat protein. Method of preparation: Accotto et al. (1990).

Replication

Replication does not depend on a helper virus.

Cytopathology

Virions found in all parts of the host plant; in cytoplasm. Inclusions absent from infected cells.

Taxonomy and relationships

Alphacryptovirus: Partitiviridae

Virus(es) with serologically related virions

Hop trefoil 1 alphacryptovirus.

Virus(es) with serologically unrelated virions

Beet 1, carnation 1, radish yellow edge, red clover, vicia and white clover 1 alphacryptoviruses.

Comments and References

References

• Accotto, G.P., Marzachi, C., Luisoni, E. and Milne, R.G. (1990). J. gen. Virol. 71: 433.
• Boccardo, G., Lisa, V., Luisoni, E. and Milne, R.G. (1987). Adv. Virus Res. 32: 171.
• Luisoni, E., Milne, R.G., Accotto, G.P. and Boccardo, G. (1987). Intervirology 28: 144.
• Natsuaki, K.T., Natsuaki, T., Okuda, S., Teranaka, M., Yamashita, S. and Doi, Y. (1984). J. Agric. Sci. 29: 49.
• Natsuaki, T., Natsuaki, K.T., Okuda, S., Teranaka, M., Milne, R.G., Boccardo, G. and Luisoni, E. (1986). Intervirology 25: 69.

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.