Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Sieg River (?) potexvirus

Index

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

Data collated by R. Koenig, 1990.

Nomenclature

ICTV decimal code

56.0.1.T.D.10

Host range and symptoms

Transmission

Probably spread by water. Virus transmitted by mechanical inoculation.

Geographical distribution

Spreads in Germany.

Experimental host range

Few (<3) families susceptible. Experimentally infected plants mostly show systemic mottle.

Diagnostically susceptible host species and symptoms

• Chenopodium quinoa, C. amaranticolor, C. capitatum, C. foliosum, C. murale, C. schraderianum - systemic mottle.
• Gomphrena globosa - necrotic local lesions.

Diagnostically insusceptible host species

Nicotiana spp., Cucumis sativus, Datura stramonium, Vicia faba, Antirrhinum majus.

Maintenance and propagation hosts

Chenopodium quinoa.

Assay hosts (Local lesions or Whole plants)

Gomphrena globosa (L), Chenopodium quinoa (W).

Susceptible host species

• Chenopodium amaranticolor
• Chenopodium capitatum
• Chenopodium foliosum
• Chenopodium murale
• Chenopodium quinoa
• Chenopodium schraderianum
• Gomphrena globosa

Insusceptible host species

• Antirrhinum majus
• Capsicum annuum
• Cucumis sativus
• Datura metel
• Datura stramonium
• Lycopersicon esculentum
• Nicandra physalodes
• Nicotiana benthamiana
• Nicotiana clevelandii
• Nicotiana debneyi
• Nicotiana glutinosa
• Nicotiana tabacum
• Vicia faba

Families containing susceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (6/6)

Families containing insusceptible hosts

• Cucurbitaceae (1/1)
• Leguminosae-Papilionoideae (1/1)
• Scrophulariaceae (1/1)
• Solanaceae (10/10)

Purification method

Koenig and Lesemann (1983 and 1985).

Physical and biochemical properties

Particle morphology

Virions filamentous; not enveloped; usually flexuous; with a clear modal length; of 466 nm; 13 nm wide.

Physical properties

One sedimenting component in purified preparations.

Biochemical properties

Genome consists of RNA; single-stranded; linear; unipartite.

Features of proteins

Virion protein(s) one; M_r 22800.

Cytopathology

Virions found in leaves, mesophyll and the epidermis; in cytoplasm. Inclusions present in infected cells; are crystals in the cytoplasm and unusual in shape; paracrystalline aggregates; they contain virions.

Taxonomy and relationships

Possible Potexvirus

Virus(es) with serologically related virions

Plantago severe mosaic and viola mottle viruses.

Virus(es) with serologically unrelated virions

Potato X, cactus X, cymbidium mosaic, papaya mosaic and white clover mosaic viruses.

Comments and References

References

• Koenig, R. and Lesemann, D.-E. (1983). CMI/AAB Descr. Pl. Viruses No. 265.
• Koenig, R. and Lesemann, D.-E. (1985). Phytopath. Z. 112: 105.

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.