Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Ageratum yellow vein bigeminivirus

Index

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

Data collated by S.M. Wong, 1993.

Nomenclature

Acronym

AYVV

ICTV decimal code

29.0.3.0.005

Host range and symptoms

Natural host range and symptoms

Ageratum conyzoides - vein yellowing.

Transmission

Transmitted by a vector; an insect; Bemisia tabaci; Aleyrodidae. Not transmitted by aphids. Virus not transmitted by mechanical inoculation; not transmitted by contact between plants; not transmitted by seed; not transmitted by pollen.

Geographical distribution

Spreads in India, Singapore, and Thailand.

Experimental host range

Several (3-9) families susceptible.

Diagnostically susceptible host species and symptoms

• Asystasia nemorum - leaf downcurling, chlorosis and mosaic.
• Emilia sonchifolia - leaf downcurling, vein yellowing.
• Oxalis barrelieri - vein yellowing, leaf downcurling, leaf distortion.
• Phyllanthus debilis - vein yellowing.
• Synedrella nodiflora - vein yellowing, mosaic, stunting.

Diagnostically insusceptible host species

Carica papaya, Citrullus lanatus, Cleome rutidosperma, Cucumis melo, Eclipta prostrata.

Maintenance and propagation hosts

Ageratum conyzoides.

Assay hosts (Local lesions or Whole plants)

Ageratum conyzoides (W).

Susceptible host species

• Ageratum conyzoides
• Asystasia nemorum
• Emilia sonchifolia
• Oxalis barrelieri
• Phyllanthus debilis
• Synedrella nodiflora

Insusceptible host species

• Carica papaya
• Citrullus lanatus
• Cleome rutidosperma
• Cucumis melo
• Eclipta prostrata
• Glycine max
• Phaseolus vulgaris

Families containing susceptible hosts

• Acanthaceae (1/1)
• Compositae (3/4)
• Euphorbiaceae (1/1)
• Oxalidaceae (1/1)

Families containing insusceptible hosts

• Caricaceae (1/1)
• Cleomaceae (1/1)
• Compositae (1/4)
• Cucurbitaceae (2/2)
• Leguminosae-Papilionoideae (2/2)

Comments on host-range

AYVV seems not to be transmitted by whitefly to ornamental Ageratum hybrids.

Sources of host-range data

Tan and Wong (1993).

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains few virions. Electron microscopy: best by ISEM.

Particle morphology

Virions geminate; not enveloped; 20 nm in diameter; 30 nm in length; with a conspicuous capsomere arrangement.

Biochemical properties

Genome consists of DNA; single-stranded; circular; of two parts; largest (or only) genome part 2.741 kb.

NCBI sequence data (Entrez search)

Sequence database accession code(s)

• X74516 Em_vi:AYVV Gb_vi:AYVV ageratum yellow vein virus V1, V2, C1, C2, C3, C4, C5 genes. 12/95 2741 bp.

Features of the genome

Non-genomic nucleic acid not found in the virions.

Replication

Replication does not depend on a helper virus.

Cytopathology

Virions found in cytoplasm and in nuclei. Inclusions present in infected cells; are unusual in shape; fibrillar rings.

Taxonomy and relationships

bigeminivirus: Geminiviridae

Virus(es) with serologically related virions

Cassava African mosaic virus.

Comments and References

References

• Tan, H.N.P. and Wong, S.M. (1993). J. Phytopathology 139: 165.
• Wong, S.M., Swanson, M.M. and Harrison, B.D. Plant Path. 42: 137.

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.