Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Spring beauty latent bromovirus

Index

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

Data collated by R.A. Valverde, 1991.

Nomenclature

Acronym

SBLV

ICTV decimal code

10.0.3.0.007

Host range and symptoms

Natural host range and symptoms

Symptoms none.
• Claytonia virginica - symptomless.

Transmission

Possibly on lawn mowers and tractors in lawns and public areas. Virus transmitted by mechanical inoculation; transmitted by grafting; possibly transmitted by contact between plants; not transmitted by seed.

Geographical distribution

Spreads in the USA.

Experimental host range

Several (3-9) families susceptible. Experimentally infected plants mostly show necrotic local lesions, systemic mottle and necrosis.

Diagnostically susceptible host species and symptoms

• Chenopodium quinoa, C. album, C. amaranticolor, Cucurbita pepo cv. Small Sugar, Datura stramonium, Glycine max cvs Lee and Bragg, Phaseolus vulgaris cvs Pinto, Bountiful, Black Valentine, Vigna radiata, V. unguiculata ssp. unguiculata cv. Monarch - necrotic local lesions.
• Cucumis sativus cv. Model - chlorotic local lesions.
• Commelina diffusa - systemic mottle.
• Gomphrena globosa - necrotic local lesions, systemic mottle and necrosis.
• Nicotiana megalosiphon, N. clevelandii - necrotic local lesions, systemic necrosis.
• Nicotiana debneyi - necrotic local lesions, systemic mottle.
• Pisum sativum cv. little Marvel - systemic mottle and necrosis.
• Vicia faba - systemic necrosis.
• Catharanthus roseus - systemic necrosis and mottle.

Diagnostically insusceptible host species

Avena sativa, Capsicum annuum, Lycopersicon esculentum, Nicotiana tabacum cv. Havana 38, Zea mays.

Maintenance and propagation hosts

Commelina diffusa, Gomphrena globosa, Nicotiana clevelandii, Pisum sativum, Catharanthus roseus.

Assay hosts (Local lesions or Whole plants)

Chenopodium quinoa (L), Datura stramonium (L), Gomphrena globosa (L and W), Pisum sativum (W), Vicia faba (W).

Susceptible host species

• Catharanthus roseus
• Chenopodium album
• Chenopodium amaranticolor
• Chenopodium quinoa
• Claytonia virginica
• Commelina diffusa
• Cucumis sativus
• Cucurbita pepo
• Datura stramonium
• Glycine max
• Gomphrena globosa
• Nicotiana clevelandii
• Nicotiana debneyi
• Nicotiana glutinosa
• Nicotiana megalosiphon
• Phaseolus vulgaris
• Pisum sativum
• Vicia faba
• Vigna radiata
• Vigna unguiculata
• Vigna unguiculata ssp. unguiculata (cv. Monarch)

Insusceptible host species

• Avena sativa
• Capsicum annuum
• Cucumis melo
• Lycopersicon esculentum
• Nicotiana tabacum
• Portulaca oleracea
• Triticum aestivum
• Zea mays
• Zinnia elegans

Families containing susceptible hosts

• Amaranthaceae (1/1)
• Apocynaceae (1/1)
• Chenopodiaceae (3/3)
• Commelinaceae (1/1)
• Cucurbitaceae (2/3)
• Leguminosae-Papilionoideae (7/7)
• Portulacaceae (1/2)
• Solanaceae (5/8)

Families containing insusceptible hosts

• Compositae (1/1)
• Cucurbitaceae (1/3)
• Gramineae (3/3)
• Portulacaceae (1/2)
• Solanaceae (3/8)

Sources of host-range data

Valverde (1985).

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains many virions.

Purification method

Valverde (1985).

Particle morphology

Virions isometric; not enveloped; 28 nm in diameter; rounded in profile; without a conspicuous capsomere arrangement.

Physical properties

One sedimenting component in purified preparations; sedimentation coefficient 90 S.

Biochemical properties

Genome consists of RNA; single-stranded; linear. Total genome size 9.5 kb. Genome of three parts; largest (or only) genome part the largest 3.9 kb; the 2nd largest 3.4 kb; the 3rd largest 2.6 kb. Genomic nucleic acid isolated by Valverde (1985). Additional factor not required for infectivity.

Features of the genome

Non-genomic nucleic acid found in the virions; is subgenomic mRNA. 5 virus specified dsRNA species found in infected cells. Size of largest virus specified dsRNA 2.2 kbp; 2nd largest 2 kbp; 3rd largest 1.4 kbp; 4th largest 1.2 kbp; 5th largest 0.5 kbp.

Features of proteins

Virion protein(s) one; M_r 23000; and it is coat protein. Method of preparation: Valverde (1985).

Replication

Replication does not depend on a helper virus.

Cytopathology

Virions found in all parts of the host plant; in cytoplasm.

Taxonomy and relationships

Bromovirus: Bromoviridae

Virus(es) with serologically related virions

Broad bean mottle, brome mosaic, cowpea chlorotic mottle and melandrium yellow fleck viruses.

Best tests for diagnosis

Serology and double diffusion tests.

Comments and References

References

• Valverde, R.A. (1985). Phytopathology 75: 395.
• Valverde, R.A. and Glascock, C.B. (1991). Phytopathology 81: 401.

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.