Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Sint-Jan's onion latent (?) carlavirus

Index

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

Data collated by A.A. Brunt, 1995.

Nomenclature

Synonyms

Welsh onion latent virus (Van Dijk and Sutarya, 1992; Van Dijk, 1993).

Acronym

SJOLV

ICTV decimal code

14.0.1.0.029

Host range and symptoms

Natural host range and symptoms

Allium sp. unident. (Sint-Jan's onion), A. ampeloprasum var. sectivum (pearl onion), A. cepa var. ascalonicum (shallot), A. cepa var. perutile (ever-ready onion), A. chinense (rakkyo), A. fistulosum (Welsh onion) - symptomless.

Transmission

Transmitted by a vector; an insect; Myzus (Sciamyzus) ascalonicus; Aphididae. Virus transmitted by mechanical inoculation.

Geographical distribution

Found, but with no evidence of spread, in Indonesia, The Netherlands.

Experimental host range

Few (<3) families susceptible. Experimentally infected plants mostly show No symptoms.

Diagnostically susceptible host species and symptoms

Allium cepa var. cepa, A. vineale (crow garlic), A. cepa var. ascalonicum, A. fistulosum (Welsh onion) - symptomless infection.

Diagnostically insusceptible host species

Allium sativum, Chlorophytum comosum, Lilium formosanum.

Maintenance and propagation hosts

Allium cepa var. cepa, A. vineale.

Assay hosts (Local lesions or Whole plants)

Allium cepa var. cepa (W).

Susceptible host species

• Allium ampeloprasum var. sectivum
• Allium cepa
• Allium cepa var. ascalonicum
• Allium cepa var. cepa
• Allium cepa var. perutile
• Allium chinense
• Allium fistulosum
• Allium vineale

Insusceptible host species

• Allium sativum
• Chlorophytum comosum
• Lilium formosanum

Families containing susceptible hosts

• Alliaceae (8/9)

Families containing insusceptible hosts

• Alliaceae (1/9)
• Anthericaceae (1/1)
• Liliaceae (1/1)

Physical and biochemical properties

Particle morphology

Virions filamentous; with a clear modal length; of 650 nm.

Taxonomy and relationships

Possible Carlavirus

Virus(es) with serologically related virions

Shallot latent and garlic common latent carlaviruses.

Comments and References

General comments

The virus is also considered to be a serological variant of shallot latent virus (Barg et al. 1995).

References

• Barg, E., Lesemann, D.-E., Vetten, H.J. and Maiss, E. (1995). Proc. 8th Conf. Virus Dis. Vegetables, p.26.
• Van Dijk, P. (1993). Neth. J. Pl. Path. 93: 233.
• Van Dijk, P. and Sutarya, R. (1992). Internal Doc. DLO, Wageningen, pp.70.

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.