Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Sweet potato yellow dwarf (?) ipomovirus

Index

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

Data collated by A.A. Brunt, 1988.

Nomenclature

Synonyms

whitefly transmissible sweet potato virus.

Acronym

SPYDV

ICTV decimal code

57.0.U.1.002

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Ipomoea batatas - stunting, chlorosis (chlorophyll content decreased by 50%), poor roots and tubers.

Transmission

Transmitted by a vector; an insect; Bemisia tabaci; Aleyrodidae. Transmitted in a persistent manner. Virus transmitted by mechanical inoculation; transmitted by grafting.

Geographical distribution

Spreads in Taiwan.

Experimental host range

Several (3-9) families susceptible.

Diagnostically susceptible host species and symptoms

• Ipomoea batatas cv. Tainung 63 - severe systemic leaf chlorosis and stunting.
• Chenopodium spp., Gomphrena globosa, Datura stramonium, Cassia occidentalis, Sesamum indicum.

Susceptible host species

• Cassia occidentalis
• Chenopodium
• Datura stramonium
• Gomphrena globosa
• Ipomoea batatas
• Sesamum indicum

Families containing susceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (1/1)
• Convolvulaceae (1/1)
• Leguminosae-Caesalpinioideae (1/1)
• Pedaliaceae (1/1)
• Solanaceae (1/1)

Sources of host-range data

Chung et al. (1986).

Physical and biochemical properties

Properties of particles in sap

TIP: 85-90 °C (in sweet potato sap). LIV: more than 7 days. DEP: log₁₀ minus 6-7.

Particle morphology

Virions filamentous; not enveloped; usually flexuous; with a clear modal length; of 750 nm.

Physical properties

One sedimenting component in purified preparations.

Features of proteins

Virion protein(s) one; M_r 33000; coat protein.

Cytopathology

Virions found in leaves; in cytoplasm. Inclusions present in infected cells; are pinwheels.

Taxonomy and relationships

Possible ipomovirus: Potyviridae

Comments and References

References

• Chung, M.L., Hsu, Y.H., Chen, M.J. and Chiu, R.J. (1986). In: Pl. Virus Diseases of Hort. Crops in the Tropics and Sub-tropics, No. 33, p. 84. FFTC Book Series.
• Liao, C.H., Chien, I.C., Chung, M.L., Chin, R.J. and Han, Y.H. (1979). J. agric. Res. China 28: 121.

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.