Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Lucerne Australian latent nepovirus

Index

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

Data collated by A.T. Jones, 1980. Revised 1987.

Nomenclature

Synonyms

lucerne latent virus.

Acronym

LALV

Strains

lucerne strain, white clover strain.

ICTV decimal code

18.0.3.0.019

Host range and symptoms

Natural host range and symptoms

Symptoms vary seasonally.
• Medicago sativa - symptomless.
• Trifolium repens - chlorotic line patterns or symptomless.

Transmission

Virus transmitted by mechanical inoculation; transmitted by seed (i.e. 1% in C. quinoa and lucerne); transmitted by pollen to the seed.

Ecology and control

Studies reported by Jones et al. (1979).

Geographical distribution

Spreads in Australia and New Zealand.

Experimental host range

Several (3-9) families susceptible.

Diagnostically susceptible host species and symptoms

• Gomphrena globosa - systemic mottle, vein yellowing.
• Chenopodium amaranticolor - systemic mottle.
• C. quinoa - necrotic local lesions; systemic mottling or streaking.
• Pisum sativum - necrotic local lesions; symptomless systemic infection.

Maintenance and propagation hosts

Chenopodium quinoa, Pisum sativum.

Assay hosts (Local lesions or Whole plants)

Chenopodium amaranticolor (W), C. quinoa (L,W).

Susceptible host species

• Cajanus cajan
• Chenopodium album
• Chenopodium amaranticolor
• Chenopodium foetidum
• Chenopodium quinoa
• Cicer arietinum
• Cucumis sativus
• Datura stramonium
• Gomphrena globosa
• Lupinus albus
• Lupinus angustifolius
• Medicago sativa
• Nicotiana clevelandii
• Nicotiana glutinosa
• Nicotiana rustica
• Nicotiana tabacum
• Phaseolus vulgaris
• Pisum sativum
• Spinacia oleracea
• Tetragonia tetragonioides
• Trifolium incarnatum
• Trifolium pratense
• Trifolium repens
• Trifolium subterraneum
• Vicia faba
• Vicia sativa
• Vigna unguiculata

Insusceptible host species

• Arachis hypogaea
• Capsicum annuum
• Chenopodium murale
• Chenopodium quinoa
• Crotalaria spectabilis
• Cucumis sativus
• Cucurbita maxima
• Glycine max
• Ipomoea setosa
• Lablab purpureus
• Lotus corniculatus
• Lycopersicon esculentum
• Phaseolus lunatus
• Phaseolus vulgaris
• Physalis floridana
• Solanum melongena
• Trifolium subterraneum
• Zinnia elegans

Families containing susceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (5/6)
• Cucurbitaceae (1/2)
• Leguminosae-Papilionoideae (14/20)
• Solanaceae (5/9)
• Tetragoniaceae (1/1)

Families containing insusceptible hosts

• Chenopodiaceae (2/6)
• Compositae (1/1)
• Convolvulaceae (1/1)
• Cucurbitaceae (2/2)
• Leguminosae-Papilionoideae (8/20)
• Solanaceae (4/9)

Sources of host-range data

Blackstock (1978); Jones et al. (1979); Forster et al. (1985).

Physical and biochemical properties

Properties of particles in sap

TIP: 50-55 °C. LIV: 8 days. DEP: log₁₀ minus 3-4. Leaf sap contains few virions.

Purification method

Jones et al. (1979).

Particle morphology

Virions isometric; not enveloped; 24-27 nm in diameter; angular in profile; without a conspicuous capsomere arrangement.

Physical properties

Three sedimenting components in purified preparations; sedimentation coefficient of the fastest 133 S (B); of the other(s) 128 S (M), or 56 S (T). A₂₆₀/A₂₈₀ ratio 1.71 (unfractionated M and B).

Biochemical properties

Virions contain 41 % nucleic acid (B), or 39 % nucleic acid (M), or 0 % nucleic acid (T); 59 % protein (B), or 61 % protein (M), or 100 % protein (T).

Genome consists of RNA; single-stranded. Total genome size 14.7 kb. Genome of two parts; largest (or only) genome part the larger 7.9 kb; the 2nd largest 6.8 kb.

Features of proteins

Virion protein(s) one; M_r 55000. Method of preparation: Jones et al. (1979).

Taxonomy and relationships

Nepovirus: Comoviridae

Comments and References

References

• Blackstock, J.M. (1978). Aust. J. agric. Res. 29: 291.
• Forster, R.L.S. and Morris-Krsinich, B. (1985). Ann. appl. Biol. 107: 449.
• Jones, A.T. and Forster, R.L.S. (1980). CMI/AAB Descr. Pl. Viruses No. 225, 4 pp.
• Jones, A.T., Forster, R.L.S. and Mohamed, N.A. (1979). Ann. appl. Biol. 92: 49.
• Taylor, R.H. and Smith, P.R. (1971). Rep. Vic. Pl. Res. Inst. 5: 20.

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.