Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Rose (?) tobamovirus

Index

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

Data collated by R.G.T. Hicks, 1991.

Nomenclature

Synonyms

rose colour break virus (Hunter, 1966; Farrar and Frost, 1972).

ICTV decimal code

71.0.1.T.DE.3

Host range and symptoms

Natural host range and symptoms

Symptoms persist. Symptoms flower break.
• Rosa spp. - deformed flecked and streaked petals, but roses infected with this tobamovirus, by sap or grafting, show no flower symptoms so the cause of the flower break disease is unknown.

Transmission

Disseminated by vegetative propagation. Virus transmitted by mechanical inoculation; transmitted by grafting (with difficulty); not transmitted by seed.

Geographical distribution

Spreads in the UK.

Experimental host range

Several (3-9) families susceptible. Experimentally infected plants mostly show local lesions, usually necrotic; systemic mosaics or mottles, or symptomless.

Diagnostically susceptible host species and symptoms

• Chenopodium amaranticolor - chlorotic local lesions; systemic chlorotic lines and spots.
• Cucumis sativus cvs Lemon, BDR - starch lesions in cotyledons; not systemic.
• Datura stramonium - chocolate local lesions; not systemic.
• Nicotiana debneyi - chlorotic mottle; systemic necrotic local lesions or mosaic.
• Nicotiana glutinosa - necrotic local lesions; systemic mosaic and leaf deformation.
• Nicotiana megalosiphon, N. tabacum cv. White Burley - necrotic local lesions; symptomless systemic.
• Petunia × hybrida cv. Rose of Heaven - necrotic local lesions; systemic mottle or flower break or symptomless.

Diagnostically insusceptible host species

Pisum sativum cv. Onward, Vicia faba, Catharanthus roseus cv. Little Pinkie.

Maintenance and propagation hosts

Nicotiana clevelandii, N. tabacum cv. White Burley, Petunia × hybrida cv. Rose of Heaven.

Assay hosts (Local lesions or Whole plants)

Chenopodium amaranticolor (L), Cucumis sativus (L).

Susceptible host species

• Chenopodium amaranticolor
• Chenopodium murale
• Chenopodium quinoa
• Cucumis sativus
• Cucurbita moschata
• Datura stramonium
• Gomphrena globosa
• Lycopersicon esculentum
• Nicotiana clevelandii
• Nicotiana debneyi
• Nicotiana glutinosa
• Nicotiana megalosiphon
• Nicotiana rustica
• Nicotiana tabacum (cv. White Burley)
• Petunia × hybrida
• Phaseolus vulgaris
• Rosa
• Spinacia oleracea
• Vigna unguiculata

Insusceptible host species

• Catharanthus roseus (cv. Little Pinkie)
• Chenopodium foetidum
• Nicotiana sylvestris
• Pisum sativum
• Vicia faba

Families containing susceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (4/5)
• Cucurbitaceae (2/2)
• Leguminosae-Papilionoideae (2/4)
• Rosaceae (1/1)
• Solanaceae (9/10)

Families containing insusceptible hosts

• Apocynaceae (1/1)
• Chenopodiaceae (1/5)
• Leguminosae-Papilionoideae (2/4)
• Solanaceae (1/10)

Sources of host-range data

Hicks (1979); Hicks and Frost (1984).

Physical and biochemical properties

Properties of particles in sap

TIP: 95 °C. LIV: 730 days. DEP: log₁₀ minus 6-7. Leaf sap contains few virions.

Purification method

Hicks and Frost (1984).

Particle morphology

Virions rod-shaped; not enveloped; usually straight; with no clear modal length; of 310-320 nm; 15 nm wide. Axial canal obvious; 2.5 nm in diameter. Basic helix obscure.

Physical properties

A₂₆₀/A₂₈₀ ratio 1.2.

Biochemical properties

Virions contain 5 % nucleic acid; 95 % protein; 0 % lipid.

Genome consists of RNA; single-stranded.

Cytopathology

Virions found in leaves.

Taxonomy and relationships

Possible Tobamovirus

Virus(es) with serologically related virions

The ash isolate of tobacco mosaic virus.

Virus(es) with serologically unrelated virions

Sunn-hemp mosaic virus.

Best tests for diagnosis

Nicotiana tabacum produces no systemic symptoms. Petunia × hybrida shows flower break at 14 or 17ºC, but not 22ºC or higher.

Comments and References

References

• Farrar, E.H. and Frost, R.R. (1972). Pl. Path. 21: 97.
• Hicks, R.G.T. (1979). Ph.D. Thesis University of Manchester, U.K.
• Hicks, R.G.T. and Frost, R.R. (1984). Pl. Path. 33: 581.
• Hunter, J.A. (1966). N.Z. Jl agric. Res. 9: 1070.

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.