Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Chicory X potexvirus

Index

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

Data collated by D. Gallitelli, 1991.

Nomenclature

Acronym

ChVX

ICTV decimal code

56.0.1.DE.01

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Cichorium intybus - leaf yellowing.

Transmission

Virus transmitted by mechanical inoculation.

Geographical distribution

Spreads in Italy (Apulia).

Experimental host range

Few (<3) families susceptible. Experimentally infected plants mostly show necrotic local lesions.

Diagnostically susceptible host species and symptoms

• Chenopodium amaranticolor, C. quinoa - necrotic local lesions.
• Gomphrena globosa - red-rimmed lesions.

Diagnostically insusceptible host species

Phaseolus vulgaris, Nicotiana tabacum, N. benthamiana, N. glutinosa, Cucumis sativus.

Maintenance and propagation hosts

Chenopodium amaranticolor.

Assay hosts (Local lesions or Whole plants)

Chenopodium amaranticolor (L), C. quinoa (L), Gomphrena globosa (L).

Susceptible host species

• Chenopodium amaranticolor
• Chenopodium quinoa
• Cichorium intybus
• Gomphrena globosa

Insusceptible host species

• Beta vulgaris
• Celosia argentea
• Cucumis sativus
• Cucurbita pepo
• Datura stramonium
• Lycopersicon esculentum
• Nicotiana benthamiana
• Nicotiana clevelandii
• Nicotiana glutinosa
• Nicotiana megalosiphon
• Nicotiana rustica
• Nicotiana tabacum
• Ocimum basilicum
• Petunia × hybrida
• Phaseolus vulgaris
• Vicia faba
• Zinnia elegans

Families containing susceptible hosts

• Amaranthaceae (1/2)
• Chenopodiaceae (2/3)
• Compositae (1/2)

Families containing insusceptible hosts

• Amaranthaceae (1/2)
• Chenopodiaceae (1/3)
• Compositae (1/2)
• Cucurbitaceae (2/2)
• Labiatae (1/1)
• Leguminosae-Papilionoideae (2/2)
• Solanaceae (9/9)

Sources of host-range data

Gallitelli and Di Franco (1982).

Physical and biochemical properties

Properties of particles in sap

TIP: 55-60 °C. LIV: 15 days. DEP: log₁₀ minus 6-7. Leaf sap contains few virions.

Purification method

Hammond and Hull (1981).

Particle morphology

Virions filamentous; usually flexuous; with a clear modal length; of 553 nm. Axial canal obscure. Basic helix obvious.

Physical properties

One sedimenting component in purified preparations; sedimentation coefficient 115 S. Density 1.304 g cm^-3 in CsCl. A₂₆₀/A₂₈₀ ratio 1.19.

Biochemical properties

Virions contain c. 5 % nucleic acid.

Genome consists of RNA; single-stranded; linear. Total genome size 7 kb. Genome unipartite; largest (or only) genome part 7 kb. Genomic nucleic acid isolated by phenol-SDS.

Features of the genome

Non-genomic nucleic acid not found in the virions.

Features of proteins

Virion protein(s) one; M_r 25000; coat protein. Method of preparation: Laemmli (1970).

Replication

Replication does not depend on a helper virus.

Cytopathology

Virions found in leaves and mesophyll; in cytoplasm. Inclusions present in infected cells; are unusual in shape; fibrous aggregates of virions; they contain virions.

Taxonomy and relationships

Potexvirus

Virus(es) with serologically unrelated virions

Potato X, cactus X, viola mottle, pepino mosaic, clitoria mosaic, clover yellow mosaic and white clover mosaic viruses.

Best tests for diagnosis

Inoculation onto Chenopodium amaranticolor and serology.

Comments and References

References

• Gallitelli, D. and Di Franco, A. (1982). Phytopath. Z. 105: 120.
• Hammond, J. and Hull, R. (1981). J. gen. Virol. 54: 75.
• Laemmli, U.K. (1970). Nature, Lond. 227: 680.

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.