Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Sweet clover necrotic mosaic dianthovirus

Index

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

Data collated by K. Boswell, 1985.

Nomenclature

Synonyms

clover sweet necrotic mosaic virus.

Acronym

SCNMV

ICTV decimal code

23.0.1.0.003

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Melilotus albus, M. officinalis - chlorotic ringspots, then mottle, mosaic, leaf malformation, veinal necrosis especially during winter.

Transmission

Virus transmitted by mechanical inoculation.

Geographical distribution

Spreads in Canada.

Experimental host range

Several (3-9) families susceptible.

Diagnostically susceptible host species and symptoms

• Chenopodium amaranticolor, C. quinoa, Gomphrena globosa, Vicia faba - necrotic local lesions, not systemic.
• Nicotiana clevelandii, N. glutinosa - systemic mosaic.
• Phaseolus vulgaris cv Red Kidney - numerous chlorotic local lesions, irregular systemic necrosis and distortion.
• Tetragonia tetragonioides - systemic mosaic.

Diagnostically insusceptible host species

Petunia × hybrida.

Maintenance and propagation hosts

Phaseolus vulgaris cv. Red Kidney.

Assay hosts (Local lesions or Whole plants)

Chenopodium amaranticolor (L), Phaseolus vulgaris cv. Red Kidney (W).

Susceptible host species

• Chenopodium amaranticolor
• Chenopodium quinoa
• Cucumis sativus
• Gomphrena globosa
• Melilotus albus
• Melilotus officinalis
• Nicotiana clevelandii
• Nicotiana glutinosa
• Nicotiana tabacum
• Phaseolus vulgaris
• Pisum sativum
• Tetragonia tetragonioides
• Trifolium pratense
• Vicia faba
• Vigna unguiculata

Insusceptible host species

• Beta vulgaris
• Datura stramonium
• Lathyrus odoratus
• Lycopersicon esculentum
• Medicago sativa
• Petroselinum crispum
• Petunia × hybrida
• Trifolium hybridum
• Trifolium repens
• Zinnia elegans

Families containing susceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (2/3)
• Cucurbitaceae (1/1)
• Leguminosae-Papilionoideae (7/11)
• Solanaceae (3/6)
• Tetragoniaceae (1/1)

Families containing insusceptible hosts

• Chenopodiaceae (1/3)
• Compositae (1/1)
• Leguminosae-Papilionoideae (4/11)
• Solanaceae (3/6)
• Umbelliferae (1/1)

Sources of host-range data

Hiruki et al. (1984).

Physical and biochemical properties

Properties of particles in sap

TIP: 90 °C. DEP: log₁₀ minus 6-7.

Purification method

Hiruki et al. (1984).

Particle morphology

Virions isometric; not enveloped; 35 nm in diameter; angular in profile.

Physical properties

One sedimenting component in purified preparations; sedimentation coefficient 126 S. A₂₆₀/A₂₈₀ ratio 1.8.

Biochemical properties

Virions contain 20 % nucleic acid; 80 % protein; 0 % lipid.

Genome consists of RNA; single-stranded. Total genome size 5.25 kb. Genome of two parts; largest (or only) genome part the larger 3.75 kb; the 2nd largest 1.5 kb.

NCBI sequence data (Entrez search)

Sequence database accession code(s)

• L07884 Em(40)_vi:SCWFUSPRO Gb(84)_vi:SCWFUSPRO Sweet clover necrotic mosaic virus unidentified genes, three complete cds's including fusion
• S46027 Em(40)_un:S46027 Gb(84)_vi:S46027 SC38P2=36.5 kda protein sweet clover necrotic mosaic virus SCNMV, strain 38, Genomic RNA Com
• S46028 Em(40)_un:S46028 Gb(84)_vi:S46028 SC59P2=36.5 kda protein sweet clover necrotic mosaic virus SCNMV, strain 59, Genomic RNA Com 3 sequences.

Features of proteins

Virion protein(s) one; M_r 38000; coat protein.

Cytopathology

Virions found in all parts of the host plant; in cytoplasm. Inclusions present in infected cells; are amorphous X-bodies.

Taxonomy and relationships

Dianthovirus

Virus(es) with serologically related virions

Red clover necrotic mosaic virus (strains SW and E).

Virus(es) with serologically unrelated virions

Carnation ringspot viruses (distantly). They produce viable recombinants, but are considered to be different species (Hiruki, 1986).

Comments and References

References

• Hiruki, C. (1986). AAB/CMI Descr. Pl. Viruses, No. 321, 4pp.
• Hiruki, C., Okuno, T., Rao, D.V. and Chen, M.H. (1981). Abstr. 5th Int. Cong. Virol. Strasbourg, France, W22/08, p.235.
• Hiruki, C., Rao, D.V., Chen, M.H., Okuno, T. and Figueiredo, G. (1984). Phytopathology 74: 482.
• Hiruki, C., Rao, D.V., Furuya, Y. and Figueiredo, G. (1983). J. gen. Virol.
• Okuna, T., Hiruki, C., Rao, D.V. and Figueiredo, G. (1983). J. gen. Virol. 64: 1907.
• Rao, D.V. and Hiruki, C. (1985a). Plant Dis. 69: 610.
• Rao, D.V. and Hiruki, C. (1985b). Plant Dis. 69: 959.

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.