Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Crotalaria spectabilis yellow mosaic (?) potexvirus

Index

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

Data collated by A.A. Brunt, 1987.

Nomenclature

ICTV decimal code

56.0.1.T.D.05

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Crotalaria spectabilis - vein clearing, yellow mosaic or general chlorosis.

Transmission

Transmitted by a vector; an insect; Myzus persicae; Aphididae. Transmitted in a non-persistent manner. Virus transmitted by mechanical inoculation; not transmitted by seed.

Geographical distribution

Spreads in Nigeria.

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Crotalaria spectabilis - vein yellowing, yellow mosaic and mottling.
• Calopogonium mucunoides - systemic chlorotic mottling and leaf curling.
• Canavalia ensiformis - interveinal systemic leaf chlorosis and malformation.
• Phaseolus lunatus - systemic mosaic.
• Vigna unguiculata - vein chlorosis and mottling.
• Glycine max - systemic vein chlorosis and mosaic.

Diagnostically insusceptible host species

Cajanus cajan, Crotalaria juncea, Cyamopsis tetragonoloba, Nicotiana glutinosa, Chenopodium quinoa.

Maintenance and propagation hosts

Calopogonium mucunoides, Crotalaria spectabilis.

Assay hosts (Local lesions or Whole plants)

Calopogonium mucunoides (W).

Susceptible host species

• Calopogonium mucunoides
• Canavalia ensiformis
• Crotalaria spectabilis
• Glycine max
• Phaseolus lunatus
• Phaseolus vulgaris
• Vigna unguiculata

Insusceptible host species

• Arachis hypogaea
• Brassica oleracea var. botrytis
• Brassica oleracea var. capitata
• Cajanus cajan
• Capsicum annuum
• Capsicum frutescens
• Catharanthus roseus
• Celosia argentea
• Chenopodium amaranticolor
• Chenopodium quinoa
• Crotalaria juncea
• Cucumis sativus
• Cyamopsis tetragonoloba
• Gomphrena globosa
• Lycopersicon esculentum
• Macroptilium lathyroides
• Nicotiana clevelandii
• Nicotiana glutinosa
• Nicotiana tabacum
• Phaseolus vulgaris
• Physalis floridana
• Pisum sativum
• Sesamum indicum
• Sesbania exaltata
• Solanum melongena
• Solanum nigrum
• Vigna unguiculata (cvs Dinner, New Era)
• Vigna unguiculata ssp. cylindrica

Families containing susceptible hosts

• Leguminosae-Papilionoideae (7/15)

Families containing insusceptible hosts

• Amaranthaceae (2/2)
• Apocynaceae (1/1)
• Chenopodiaceae (2/2)
• Cruciferae (2/2)
• Cucurbitaceae (1/1)
• Leguminosae-Papilionoideae (10/15)
• Pedaliaceae (1/1)
• Solanaceae (9/9)

Sources of host-range data

Igewegbe (1982).

Physical and biochemical properties

Properties of particles in sap

TIP: 55-60 °C. LIV: 1-2 days (at 20-22ºC). DEP: log₁₀ minus 3-4.

Particle morphology

Virions filamentous; not enveloped; usually flexuous; with a clear modal length; of 500 nm. Axial canal obscure; 12 nm in diameter. Basic helix obscure.

Taxonomy and relationships

Possible Potexvirus

Comments and References

General comments

This virus resembles centrosema mosaic virus, but does not infect Centrosema pubescens, and also, unlike most potexviruses, is reported to be transmitted by aphids.

References

• Igwegbe, E.C.K. (1982). Plant Dis. 66: 74.
• Van Velsen, R.J. and Crowley, N.C. (1981). Nature, Lond. 189: 858.
• Van Velsen, R.J. and Crowley, N.C. (1962). Aust. J. agric. Res. 13: 220.

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.