Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Blueberry necrotic shock ilarvirus

Index

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

Data collated by R.R. Martin, 1991.

Nomenclature

Synonyms

Blueberry shock virus.

Acronym

BlShV

ICTV decimal code

10.0.2.02.02

Host range and symptoms

Natural host range and symptoms

Symptoms vary seasonally. Symptoms leaf and flower necrosis.
• Vaccinium corymbosum - leaf and flower necrosis during bloom, plants show symptoms for 1-4 years, then recover and remain symptomless and produce good quality fruit.

Transmission

Virus spreads quickly in a crop. Removal of infected plants does not slow the spread of the virus significantly. Not transmitted by Fimbriaphis fimbriata, Myzus persicae. Virus transmitted by mechanical inoculation; transmitted by grafting; not transmitted by contact between plants.

Geographical distribution

Spreads in the USA (Oregon and Washington State).

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Nicotiana benthamiana, N. clevelandii, N. sylvestris, N. tabacum cvs Samsun and Havana-425 - necrotic local lesions; systemic necrosis.
• Vaccinium corymbosum - necrosis of leaves and flowers.

Diagnostically insusceptible host species

Chenopodium quinoa, Cucumis sativus, Gomphrena globosa, Petunia × hybrida, Phaseolus vulgaris.

Maintenance and propagation hosts

Nicotiana benthamiana, N. clevelandii, Vaccinium corymbosum.

Assay hosts (Local lesions or Whole plants)

Nicotiana clevelandii (W).

Susceptible host species

• Nicotiana benthamiana
• Nicotiana clevelandii
• Nicotiana sylvestris
• Nicotiana tabacum
• Vaccinium corymbosum

Insusceptible host species

• Brassica juncea
• Chenopodium amaranticolor
• Chenopodium quinoa
• Cucumis sativus
• Gomphrena globosa
• Lycopersicon esculentum
• Petunia × hybrida
• Phaseolus vulgaris

Families containing susceptible hosts

• Ericaceae (1/1)
• Solanaceae (4/6)

Families containing insusceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (2/2)
• Cruciferae (1/1)
• Cucurbitaceae (1/1)
• Leguminosae-Papilionoideae (1/1)
• Solanaceae (2/6)

Sources of host-range data

MacDonald et al. (1991).

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains few virions.

Purification method

MacDonald et al. (1991).

Particle morphology

Virions isometric; not enveloped; 27 nm in diameter; angular in profile; without a conspicuous capsomere arrangement.

Physical properties

Two sedimenting components in purified preparations. A₂₆₀/A₂₈₀ ratio 1.46-1.6 (uncorrected for light scattering).

Biochemical properties

Genome consists of RNA; single-stranded; linear. Total genome size 7.717 kb. Genome of four parts; largest (or only) genome part 2.901 kb; the 2nd largest 2.366 kb; the 3rd largest 1.605 kb; the 4th largest 0.845 kb. Genomic nucleic acid isolated by proteinase K digest of coat protein.

Features of proteins

Virion protein(s) one; M_r 27300; coat protein. Method of preparation: MacDonald et al. (1991).

Cytopathology

Virions found in leaves, roots and mesophyll; in cytoplasm.

Taxonomy and relationships

Ilarvirus: Bromoviridae (subgroup 2)

Virus(es) with serologically related virions

Apple mosaic and prunus necrotic ringspot viruses.

Virus(es) with serologically unrelated virions

Asparagus 2, citrus leaf rugose, citrus variegation, elm mosaic, elm mottle, Humulus japonicus, prune dwarf, spinach latent, tobacco streak and Tulare apple mosaic viruses.

Comments and References

References

• MacDonald, S.G., Martin, R.R. and Bristow, P.R. (1989). Acta Hort. 241: 295.
• MacDonald, S.G., Martin, R.R. and Bristow, P.R. (1991). Phytopathology 81: 210.

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.