Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Sunflower ringspot (?) ilarvirus

Index

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

Data collated by J.L. Dale, 1986.

Nomenclature

ICTV decimal code

78.0.1.T.008

Host range and symptoms

Natural host range and symptoms

Symptoms disappear soon after infection.
• Glycine max, Helianthus annuus, Lycopersicon esculentum - mosaic, ringspots and/or line patterns.

Transmission

Virus transmitted by mechanical inoculation; transmitted by grafting; probably transmitted by seed.

Geographical distribution

Spreads in Australia.

Experimental host range

Several (3-9) families susceptible.

Diagnostically susceptible host species and symptoms

• Pisum sativum - systemic chlorosis.
• Chenopodium amaranticolor - local lesions.

Maintenance and propagation hosts

Pisum sativum.

Assay hosts (Local lesions or Whole plants)

Chenopodium amaranticolor (L).

Susceptible host species

• Capsella bursa-pastoris
• Chenopodium amaranticolor
• Chenopodium quinoa
• Cucurbita maxima
• Galinsoga parviflora
• Glycine max
• Gomphrena globosa
• Helianthus annuus
• Lathyrus odoratus
• Lens culinaris
• Lycopersicon esculentum
• Macrotyloma uniflorum
• Nicandra physalodes
• Nicotiana clevelandii
• Nicotiana glutinosa
• Petunia × hybrida
• Phaseolus vulgaris
• Physalis floridana
• Pisum sativum
• Spinacia oleracea
• Stellaria media
• Trifolium incarnatum
• Vicia faba
• Vigna unguiculata

Families containing susceptible hosts

• Amaranthaceae (1/1)
• Caryophyllaceae (1/1)
• Chenopodiaceae (3/3)
• Compositae (2/2)
• Cruciferae (1/1)
• Cucurbitaceae (1/1)
• Leguminosae-Papilionoideae (9/9)
• Solanaceae (6/6)

Physical and biochemical properties

Properties of particles in sap

TIP: 55-60 °C. LIV: 1-2 days. DEP: log₁₀ minus 4-5. Leaf sap contains few virions.

Particle morphology

Virions isometric; 28 nm in diameter; rounded in profile; without a conspicuous capsomere arrangement.

Physical properties

One sedimenting component in purified preparations.

Biochemical properties

Genome consists of RNA; single-stranded; probably linear. Total genome size 10.761 kb. Genome of four parts, or of five parts; largest (or only) genome part the largest 3.38 kb; the 2nd largest 2.648 kb; the 3rd largest 2.507 kb; the 4th largest 1.409 kb; the 5th largest 0.817 kb. Infectivity retained when deproteinised with phenol or detergent.

Features of the genome

Non-genomic nucleic acid found in the virions; is subgenomic mRNA.

Features of proteins

Virion protein(s) one; M_r 24000. Amino acid composition: J.L. Dale (unpublished data).

Replication

Replication does not depend on a helper virus.

Cytopathology

Virions found in mesophyll; in cytoplasm. Inclusions absent from infected cells.

Taxonomy and relationships

Probably Ilarvirus: Bromoviridae

Virus(es) with serologically unrelated virions

Prunus necrotic ringspot, cucumber mosaic, alfalfa mosaic, prune dwarf and tobacco streak viruses.

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.