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Descriptions and Lists from the VIDE Database

Elm mottle ilarvirus

Index

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

Data collated by A.T. Jones, H. Kleinhempel and K. Kontzog, 1987.

Nomenclature

Synonyms

possibly hydrangea mosaic virus (Jones, 1985), lilac streak mosaic virus (Smolak and Novak, 1950), lilac white mosaic virus.

Acronym

EMoV

ICTV decimal code

10.0.2.02.05

Host range and symptoms

Natural host range and symptoms

Symptoms persist (but restricted to a few branches).
• Hydrangea macrophylla - chlorotic mosaic.
• Syringa vulgaris - white mosaic.
• Ulmus minor - light green blotches, diffuse mottling.
• Ulmus glabra - mottling, banded or `oak-leaf` pattern.

Transmission

Virus transmitted by mechanical inoculation; transmitted by grafting; transmitted by seed (Jones and Mayo 1973).

Ecology and control

Studies reported by Schmelzer et al. (1966); Schmelzer (1969).

Geographical distribution

Probably distributed worldwide. Found, but with no evidence of spread, in Germany and Scotland; similar leaf symptoms in elm seen in other countries (Schmelzer et al., 1966).

Experimental host range

Many (>9) families susceptible.

Diagnostically susceptible host species and symptoms

• Chenopodium quinoa - chlorotic or necrotic local lesions, then systemic mottling and malformation.
• Cucumis sativus - chlorotic blotches, severe systemic mosaic.
• Nicotiana megalosiphon - chlorotic or necrotic blotches systemic crinkling.

Diagnostically insusceptible host species

Arachis hypogaea, Brassica oleracea, Digitalis purpurea, Gypsophila perfoliata, Reseda alba.

Maintenance and propagation hosts

Chenopodium quinoa, Nicotiana tabacum for propagation. Petunia × hybrida for maintenance.

Assay hosts (Local lesions or Whole plants)

Chenopodium quinoa (W), Phaseolus vulgaris (L), Vigna unguiculata ssp. unguiculata (L).

Susceptible host species

• Amaranthus retroflexus
• Antirrhinum majus
• Atriplex hortensis
• Beta vulgaris
• Catharanthus roseus
• Celosia argentea
• Chenopodium album
• Chenopodium amaranticolor
• Chenopodium foetidum
• Chenopodium murale
• Chenopodium quinoa
• Cucumis sativus
• Cucurbita maxima
• Cucurbita pepo
• Helianthus annuus
• Hydrangea macrophylla
• Lathyrus odoratus
• Lavatera trimestris
• Lobelia erinus
• Lycopersicon esculentum
• Matthiola incana
• Nicotiana clevelandii
• Nicotiana glutinosa
• Nicotiana megalosiphon
• Nicotiana tabacum
• Ocimum basilicum
• Petunia × hybrida
• Phaseolus vulgaris
• Phlox drummondii
• Physalis peruviana
• Senecio vulgaris
• Spinacia oleracea
• Stellaria media
• Syringa vulgaris
• Ulmus glabra
• Ulmus minor
• Vicia faba
• Vigna unguiculata
• Vigna unguiculata ssp. unguiculata
• Zinnia elegans

Insusceptible host species

• Arachis hypogaea
• Brassica oleracea
• Brassica oleracea var. capitata
• Citrullus lanatus
• Dianthus barbatus
• Digitalis purpurea
• Gypsophila perfoliata
• Reseda alba
• Tropaeolum majus

Families containing susceptible hosts

• Amaranthaceae (2/2)
• Apocynaceae (1/1)
• Campanulaceae (1/1)
• Caryophyllaceae (1/3)
• Chenopodiaceae (8/8)
• Compositae (3/3)
• Cruciferae (1/3)
• Cucurbitaceae (3/4)
• Hydrangeaceae (1/1)
• Labiatae (1 /1)
• Leguminosae-Papilionoideae (5/6)
• Malvaceae (1/1)
• Oleaceae (1/1)
• Polemoniaceae (1/1)
• Scrophulariaceae (1/2)
• Solanaceae (7/7)
• Ulmaceae (2/2)

Families containing insusceptible hosts

• Caryophyllaceae (2/3)
• Cruciferae (2/3)
• Cucurbitaceae (1/4)
• Leguminosae-Papilionoideae (1/6)
• Resedaceae (1/1)
• Scrophulariaceae (1/2)
• Tropaeolaceae (1/1)

Comments on host-range

For other susceptible and insusceptible hosts see Schmelzer (1969).

Sources of host-range data

Schmelzer (1969).

Physical and biochemical properties

Properties of particles in sap

TIP: 58-62 °C. LIV: 6 days. DEP: log₁₀ minus 3-4. Infectivity of sap increased by treatment with di-ethyl ether. Leaf sap contains few virions. Electron microscopy: stain with UF.

Purification method

Schmelzer (1969); Jones and Mayo (1973).

Particle morphology

Virions isometric; not enveloped; 25-30 nm in diameter; rounded in profile; without a conspicuous capsomere arrangement.

Physical properties

Three sedimenting components in purified preparations; sedimentation coefficient of the fastest 101 S (B); of the other(s) 88 S (M), or 83 S (T). Density 1.35 g cm^-3 in CsCl (Jones and Mayo, 1973).

Biochemical properties

Genome consists of RNA; single-stranded; linear. Total genome size 11.9 kb. Genome of five parts; largest (or only) genome part the largest 4 kb; the 2nd largest 3.6 kb; the 3rd largest 2.5 kb; the 4th largest 1 kb; the 5th largest 0.8 kb. Genomic nucleic acid isolated by Jones and Mayo (1973). Infectivity retained when deproteinised with proteases.

Features of proteins

Virion protein(s) one; M_r 25000. Method of preparation: Jones and Mayo (1973).

Replication

Replication does not depend on a helper virus.

Cytopathology

Virions found in pollen and seed.

Taxonomy and relationships

Ilarvirus: Bromoviridae (subgroup 2)

Virus(es) with serologically related virions

Asparagus II, citrus leaf rugose, citrus variegation and hydrangea mosaic viruses.

Virus(es) with serologically unrelated virions

Tobacco streak, prunus necrotic ringspot, apple mosaic and prune dwarf viruses.

Comments and References

References

• Jones, A.T. (1974). CMI/AAB Descr. Pl. Viruses No. 139, 4pp.
• Jones, A.T. (1985). Rep. Scottish Crop Res. Inst. 1984, p. 190.
• Jones, A.T. and Mayo, M.A. (1973). Ann. appl. Biol. 75: 347.
• Schmelzer, K. (1969). Phytopath. Z. 64: 39.
• Schmelzer, K. (1977). In: Pflanzliche Virologie Vol. 3. p. 276; ed. M. Klinkowski. Berlin, Akademie-Verlag.
• Schmelzer, K., Schmidt, H.E. and Schmidt, H.B. (1966a). Arch. Gartenb. 14: 303.
• Schmelzer, K., Schmidt, H.E. and Schmidt, H.B. (1966b). Arch. Forstw. 15: 107.
• Smolak, J. and Novak, H.B. (1950). Ochr. Rost. 23: 285.
• Thomas, B.J., Barton, R.J. and Tuszynski, A. (1983). Ann. appl. Biol. 103: 261.

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.