Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Strawberry pseudo mild yellow edge carlavirus

Index

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

Data collated by N. Yoshikawa, 1991.

Nomenclature

Acronym

SPMYEV

ICTV decimal code

14.0.1.0.030

Host range and symptoms

Natural host range and symptoms

Symptoms none.
• Fragaria virginiana, F. × ananassa - symptomless.

Transmission

Transmitted by a vector; an insect; Chaetosiphon thomasi jacobi, C. fragaraefolii, Aphis gossypii; Aphididae. Principal natural vector(s): Chaetosiphon fragaraefolii, Aphis gossypii. Transmitted in a semi-persistent manner. Virus lost by the vector when it moults; does not multiply in the vector; not transmitted congenitally to the progeny of the vector; not transmitted by mechanical inoculation; transmitted by grafting; not transmitted by contact between plants; not transmitted by seed.

Geographical distribution

Spreads in Japan and the USA.

Experimental host range

Few (<3) families susceptible. Experimentally infected plants mostly show yellow to reddish colouration on lower leaves, followed by necrosis and leaf roll.

Diagnostically susceptible host species and symptoms

• Fragaria × ananassa - symptomless.
• Fragaria vesca - chlorotic mottle and reddening on older leaves, then necrosis and leaf fall.
• Fragaria virginiana - yellow to red colouration of old leaves.

Maintenance and propagation hosts

• Fragaria × ananassa, F. virginiana, F. vesca.

Assay hosts (Local lesions or Whole plants)

Fragaria vesca (W).

Susceptible host species

• Fragaria chiloensis
• Fragaria vesca
• Fragaria virginiana
• Fragaria × ananassa

Families containing susceptible hosts

• Rosaceae (4/4)

Sources of host-range data

Frazier (1966); Yoshikawa and Inouye (1986).

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains few virions.

Purification method

Yoshikawa and Inouye (1986).

Particle morphology

Virions filamentous; not enveloped; usually straight; with a clear modal length; of 625 nm; 12 nm wide. Axial canal obscure. Basic helix obscure.

Physical properties

One sedimenting component in purified preparations. Density 1.32 g cm^-3 in CsCl. A₂₆₀/A₂₈₀ ratio 1.19.

Biochemical properties

Virions contain 5 % nucleic acid.

Genome consists of RNA; single-stranded; linear (possibly). Total genome size 8 kb. Genome unipartite; largest (or only) genome part 8 kb. Genomic nucleic acid isolated by Yoshikawa and Inouye (1986).

Features of the genome

Non-genomic nucleic acid not found in the virions.

Features of proteins

Virion protein(s) one; M_r 33500; coat protein.

Cytopathology

Virions found in leaves, mesophyll, epidermis, vascular parenchyma and companion cells; in cytoplasm. Inclusions absent from infected cells.

Taxonomy and relationships

Carlavirus

Virus(es) with serologically related virions

Carnation latent virus.

Best tests for diagnosis

Dot immunobinding assay.

Comments and References

References

• Frazier, N.W. (1966). Phytopathology 56: 571.
• Yoshikawa, N. and Inouye, T. (1986). Ann. Phytopath. Soc. Japan 52: 643.
• Yoshikawa, N., Poolpol. P. and Inouye, T. (1986). Ann. Phytopath. Soc. Japan 52: 728.

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.