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Descriptions and Lists from the VIDE Database

Amaranthus mosaic (?) potyvirus

Index

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

Data collated by V.R. Mali, 1987.

Nomenclature

Synonyms

pigweed mosaic virus (Singh et al., 1972).

Strains

Coimbatore strain (Govindaswamy et al., 1967).

ICTV decimal code

57.0.1.DE.05

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Amaranthus lividus, A. viridis - systemic blotchy mosaic and mottle, sometimes with severe vein yellowing.
• A. caudatus, A. tricolor - systemic mosaic, leaves puckered.

Transmission

Virus transmitted by mechanical inoculation; transmitted by grafting.

Ecology and control

Studies reported by Govindaswamy et al. (1967); Mali (1985); Phatak (1965); Singh et al. (1972).

Geographical distribution

Spreads in the Central Asian region; India (Coimbatore (Tamil Nadu) and Delhi (Andhra Pradesh)).

Experimental host range

Few (<3) families susceptible. Experimentally infected plants mostly show mosaics and mottling.

Diagnostically susceptible host species and symptoms

• Amaranthus cruentus, A. dilatum, A. leucocarpus, A. tricolor - systemic mosaic and mottling.

Diagnostically insusceptible host species

Chenopodium album, C. amaranticolor, Capsicum annuum, Nicotiana glutinosa, N. tabacum, Nicandra physalodes, Solanum nigrum.

Maintenance and propagation hosts

Amaranthus viridis, A. caudatus and A. tricolor.

Assay hosts (Local lesions or Whole plants)

Amaranthus caudatus (W).

Susceptible host species

• Amaranthus caudatus
• Amaranthus cruentus
• Amaranthus dilatum
• Amaranthus leucocarpus
• Amaranthus lividus
• Amaranthus tricolor
• Amaranthus viridis
• Gomphrena globosa
• Petunia × hybrida

Insusceptible host species

• Beta vulgaris
• Capsicum annuum
• Chenopodium album
• Chenopodium amaranticolor
• Chenopodium murale
• Cucumis melo
• Cucurbita moschata
• Cyamopsis tetragonoloba
• Datura stramonium
• Helianthus annuus
• Nicandra physalodes
• Nicotiana glutinosa
• Nicotiana tabacum
• Solanum melongena
• Solanum nigrum

Families containing susceptible hosts

• Amaranthaceae (8/8)
• Solanaceae (1/8)

Families containing insusceptible hosts

• Chenopodiaceae (4/4)
• Compositae (1/1)
• Cucurbitaceae (2/2)
• Leguminosae-Papilionoideae (1/1)
• Solanaceae (7/8)

Sources of host-range data

Govindaswamy et al. (1967). Phatak (1965). Singh et al. (1972).

Physical and biochemical properties

Properties of particles in sap

TIP: 55-60 °C. LIV: 1 days. DEP: log₁₀ minus 1-2. Leaf sap contains few virions.

Particle morphology

Virions filamentous; not enveloped; usually flexuous; with a clear modal length; of 700-728 nm; 14 nm wide.

Taxonomy and relationships

unassigned potyvirus

Additional comments on relationships

Phatak (1965) reported a mosaic disease of Amaranthus lividus and A. viridis from Delhi, India in 1965 and called it amaranthus mosaic virus. This has been regarded as the type culture of AMV. Subsequently a variant has been reported by Govindaswamy et al. (1967) from Coimbatore, Tamil Nadu, India in naturally infected A. caudatus and A. tricolor. The Coimbatore isolate differs from the type culture (strain) in infecting Gomphrena globosa and Petunia × hybrida. Singh et al. (1972) reported its virion morphology and it has since been considered a member of the potyvirus group (Mali, 1985), but its possible relationship with amaranthus leaf mottle potyvirus (Hollings and Brunt, 1981; Lovisolo and Lisa, 1976) needs to be tested.

Comments and References

References

• Govindasamy, C.V., Mariappan, V., Kandaswamy, T.K. and Padmanabham, C. (1967). Madras Agric. J. 54: 35.
• Hollings, M. and Brunt, A.A. (1981). CMI/AAB Descr. Pl. Viruses No. 245, 7 pp.
• Lovisolo, O. and Lisa, V. (1976). 4th Congr. Medit. Phytopath. Union, Poljopr Znanst Smotra 39: 553.
• Mali, V.R. (1985). Int. J. Trop. Pl. Dis. 3: 93.
• Phatak, H.C. (1965). Curr. Sci. 34: 645.
• Singh, S., Varma, A., Chenulu, V.V. and Verma, V.S. (1972). Phytopath. Z. 75: 82.

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.