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Descriptions and Lists from the VIDE Database

Asparagus 2 ilarvirus

Index

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

Data collated by A. Bertaccini, 1991.

Nomenclature

Synonyms

asparagus virus C, asparagus latent virus.

Acronym

AV-2

ICTV decimal code

10.0.2.02.01

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Asparagus officinalis - stunting, decline.

Transmission

Not transmitted by Myzus persicae. Virus transmitted by mechanical inoculation; transmitted by grafting; transmitted by seed; transmitted by pollen to the seed and transmitted by pollen to the pollinated plant.

Ecology and control

Studies reported by Bertaccini et al. (1990); Yang and Clore (1976).

Geographical distribution

Spreads in the Eurasian region and the North American region. Found, but with no evidence of spread, in Europe and North America; Denmark, Germany, Italy, the UK and the USA.

Experimental host range

Several (3-9) families susceptible. Experimentally infected plants mostly show necrotic local lesions and rings, vein chlorosis and mottling.

Diagnostically susceptible host species and symptoms

• Chenopodium amaranticolor, C. quinoa - local necrotic spots, systemic necrosis.
• Gomphrena globosa - white spots with red borders.
• Nicotiana tabacum cv. Samsun - local necrotic rings and systemic vein yellowing and necrotic lines.
• Nicotiana tabacum cv. White Burley - local necrotic rings.

Diagnostically insusceptible host species

Cucumis melo, Datura stramonium, Lactuca sativa.

Maintenance and propagation hosts

Chenopodium amaranticolor (L), C. quinoa (L), Nicotiana tabacum cv. Samsun (W).

Susceptible host species

• Asparagus officinalis
• Beta vulgaris
• Chenopodium amaranticolor
• Chenopodium murale
• Chenopodium quinoa
• Cucumis sativus
• Glycine max
• Gomphrena globosa
• Nicotiana glutinosa
• Nicotiana glutinosa × N. clevelandii
• Nicotiana tabacum
• Ocimum basilicum
• Petunia × hybrida
• Phaseolus vulgaris
• Vigna unguiculata

Insusceptible host species

• Cucumis melo
• Datura stramonium
• Lactuca sativa

Families containing susceptible hosts

• Amaranthaceae (1/1)
• Asparagaceae (1/1)
• Chenopodiaceae (4/4)
• Cucurbitaceae (1/2)
• Labiatae (1/1)
• Leguminosae-Papilionoideae (3/3)
• Solanaceae (4/5)

Families containing insusceptible hosts

• Compositae (1/1)
• Cucurbitaceae (1/2)
• Solanaceae (1/5)

Sources of host-range data

Giunchedi et al. (1987); Uyeda and Mink (1981).

Physical and biochemical properties

Properties of particles in sap

TIP: 45 °C. LIV: 2 days. DEP: log₁₀ minus 3.

Purification method

Giunchedi et al. (1987); Phillips and Brunt (1985); Uyeda and Mink (1981).

Particle morphology

Virions isometric; not enveloped; neither clearly angular or nor rounded in profile; without a conspicuous capsomere arrangement.

Physical properties

Three sedimenting components in purified preparations; sedimentation coefficient of the fastest 90 S (»2); of the other(s) 104 S (»2), or 95 S. A₂₆₀/A₂₈₀ ratio 1.31-1.36.

Sequence database accession code(s)

• X86352 Em(43)_vi:Aviirna3 Gb(89)_vi:Aviirna3 Asparagus virus II RNA3 ORF1 & ORF2. 5/95 2,307bp.

Cytopathology

Inclusions absent from infected cells.

Taxonomy and relationships

Ilarvirus: Bromoviridae (subgroup 2)

Virus(es) with serologically related virions

Citrus leaf rugose, citrus variegation, elm mottle and Tulare apple mosaic viruses.

Virus(es) with serologically unrelated virions

Tobacco streak viruses.

Comments and References

References

• Bertaccini, A., Macri, S., Poggi Pollini, C. and Martini, L. (1988). Inform. Fitopatol. 38: 39.
• Bertaccini, A., Giunchedi, L. and Poggi Pollini, C. (1990). Acta Hort. 271: 279.
• Bertaccini, A., Marani, F. and Passarelli, V. (1984). Atti giornate Fitopatol. 1984, Sorrento, Vol. 30, p. 437.
• Giunchedi, L., Poggi Pollini, C., Bertaccini, A. and Marani, F. (1987). Phytopath. Medit. 26: 117.
• Groschel, H. (1976). Ph.D. Thesis, Tech. Univ. Hanover, pp.103.
• Hartung, A.C., Evans, T.A. and Stephens, C.T. (1985). Plant Dis. 6: 501.
• Mink, G.I. and Uyeda, I. (1977). Pl. Dis. Reptr 61: 398.
• Paludan, N. (1964). Maanedsovers. PlSygd. 407: 11.
• Phillips, S. and Brunt, A.A. (1985). Pl. Path. 34: 440.
• Uyeda, I. and Mink, G.I. (1981). Phytopathology 71: 1264.
• Uyeda, I. and Mink, G.I. (1983). Phytopathology 73: 47.
• Uyeda, I. and Mink, G.I. (1984). CMI/AAB Descr. Pl. Viruses No.288, 4 pp.
• Yang, H.J. and Clore, W.J. (1976). Hort. Science 12: 140.

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.