Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Asparagus 3 potexvirus

Index

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

Data collated by I. Fujisawa, 1990.

Nomenclature

Acronym

AV-3

ICTV decimal code

56.0.1.0.002

Host range and symptoms

Natural host range and symptoms

Symptoms vary seasonally.
• Asparagus spp. - faint leaf chlorosis.

Transmission

Transmitted by means not involving a vector. Not transmitted by aphids. Virus transmitted by mechanical inoculation; not transmitted by seed.

Geographical distribution

Spreads in the Eastern Asian region; Japan.

Experimental host range

Several (3-9) families susceptible. Experimentally infected plants mostly show mosaic, mild mosaic and necrotic local lesions.

Diagnostically susceptible host species and symptoms

• Chenopodium quinoa, Nicotiana clevelandii - mosaic.
• Spinacia oleracea - symptomless systemic infection.
• Nicotiana tabacum cv. Bright Yellow, Vicia faba - necrotic local lesions; not systemic.
• Nicotiana debneyi, Glycine max - mild mosaic.

Diagnostically insusceptible host species

Allium cepa, A. fistulosum, Lycopersicon esculentum, Brassica campestris ssp. rapa, Cucurbita pepo.

Maintenance and propagation hosts

Nicotiana debneyi, N. megalosiphon, N. clevelandii.

Assay hosts (Local lesions or Whole plants)

Chenopodium amaranticolor (L), Vicia faba (L), Sesamum indicum (L), Nicotiana benthamiana (W).

Susceptible host species

• Amaranthus retroflexus
• Asparagus
• Beta vulgaris
• Chenopodium amaranticolor
• Chenopodium murale
• Chenopodium quinoa
• Datura metel
• Datura stramonium
• Glycine max
• Gomphrena globosa
• Nicotiana benthamiana
• Nicotiana clevelandii
• Nicotiana debneyi
• Nicotiana glutinosa
• Nicotiana megalosiphon
• Nicotiana rustica
• Nicotiana tabacum
• Pisum sativum
• Sesamum indicum
• Solanum tuberosum
• Spinacia oleracea
• Tetragonia tetragonioides
• Vicia faba
• Vigna angularis
• Vigna unguiculata ssp. sesquipedalis
• Zinnia elegans

Insusceptible host species

• Allium cepa
• Allium fistulosum
• Brassica campestris ssp. pekinensis
• Brassica campestris ssp. rapa
• Brassica oleracea var. capitata
• Capsicum annuum
• Cucumis melo
• Cucumis sativus
• Cucurbita maxima
• Cucurbita pepo
• Dianthus caryophyllus
• Hordeum vulgare
• Lycopersicon esculentum
• Petunia × hybrida
• Phaseolus vulgaris
• Triticum aestivum
• Zea mays

Families containing susceptible hosts

• Amaranthaceae (2/2)
• Asparagaceae (1/1)
• Chenopodiaceae (5/5)
• Compositae (1/1)
• Leguminosae-Papilionoideae (5/6)
• Pedaliaceae (1/1)
• Solanaceae (10/13)
• Tetragoniaceae (1/1)

Families containing insusceptible hosts

• Alliaceae (2/2)
• Caryophyllaceae (1/1)
• Cruciferae (3/3)
• Cucurbitaceae (4/4)
• Gramineae (3/3)
• Leguminosae-Papilionoideae (1/6)
• Solanaceae (3/13)

Physical and biochemical properties

Properties of particles in sap

TIP: 60 °C. LIV: 23 days. DEP: log₁₀ minus 4. Leaf sap contains many virions. Electron microscopy: use glutaraldehyde or osmic acid to fix.

Purification method

Fujisawa (1986).

Particle morphology

Virions filamentous; not enveloped; usually flexuous; with a clear modal length; of 580 nm; 13 nm wide. Axial canal obscure. Basic helix obscure.

Physical properties

One sedimenting component in purified preparations. A₂₆₀/A₂₈₀ ratio 1.18-1.19.

NCBI sequence data (Entrez search)

Replication

Replication does not depend on a helper virus.

Cytopathology

Virions found in leaves and mesophyll; in cytoplasm. Inclusions absent from infected cells.

Taxonomy and relationships

Potexvirus

Virus(es) with serologically related virions

Cactus X and narcissus mosaic viruses.

Virus(es) with serologically unrelated virions

White clover mosaic, clover yellow mosaic, potato X and tulip X viruses.

Best tests for diagnosis

Bioassay on test plants: Sesamum indicum, Vicia faba.

Comments and References

References

• Fujisawa, I. (1986). Ann. Phytopath. Soc. Japan 52: 2.
• Hull, R., Brown, F. and Payne, C. (1989). In: Virology: Directory and Dictionary of Animal, Bacterial and Plant Viruses. Macmillan Press, U.K.

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.