Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Sweet potato latent (?) potyvirus

Index

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

Data collated by A.A. Brunt, S. Molyneux, 1986, F. Nienhaus, 1987.

Nomenclature

Synonyms

sweet potato virus N.

Acronym

SwPLV

ICTV decimal code

57.0.1.T.078

Host range and symptoms

Natural host range and symptoms

Symptoms disappear soon after infection.
• Ipomoea batatas - most cultivars infected symptomlessly.

Transmission

Virus transmitted by mechanical inoculation; transmitted by grafting; not transmitted by contact between plants; not transmitted by seed.

Ecology and control

Studies reported by Liao et al. (1979); Liao et al. (1982).

Geographical distribution

Spreads in Taiwan.

Experimental host range

Several (3-9) families susceptible.

Diagnostically susceptible host species and symptoms

• Nicotiana benthamiana - systemic mosaic and stunting.
• Chenopodium quinoa, C. amaranticolor - brown necrotic local lesions; no systemic infection.
• Ipomoea nil - systemic mottle on c. 6-8 leaves but symptomless on subsequent leaves.
• Nicotiana tabacum cv. Dutch `A' - chlorotic rings.
• Nicotiana megalosiphon - systemic deformation and mottling.
• Nicotiana clevelandii - systemic pin-prick chlorotic local lesions.

Diagnostically insusceptible host species

Nicotiana glutinosa, N. debneyi, Chenopodium murale, C. capitatum.

Maintenance and propagation hosts

Nicotiana benthamiana, N. clevelandii.

Assay hosts (Local lesions or Whole plants)

Chenopodium quinoa (L), Chenopodium amaranticolor (L), Nicotiana benthamiana (W).

Susceptible host species

• Chenopodium amaranticolor
• Chenopodium murale
• Chenopodium quinoa
• Ipomoea batatas (cv. Tainung 63)
• Ipomoea nil
• Ipomoea setosa
• Nicotiana benthamiana
• Nicotiana clevelandii
• Nicotiana debneyi
• Nicotiana megalosiphon
• Nicotiana tabacum

Insusceptible host species

• Avena byzantina
• Avena sativa
• Brassica campestris ssp. pekinensis
• Brassica campestris ssp. rapa
• Calendula officinalis
• Capsicum annuum
• Celosia cristata
• Chenopodium capitatum
• Chenopodium murale
• Cucumis metuliferus
• Cucumis sativus
• Glycine max
• Gomphrena globosa
• Hordeum vulgare
• Lycopersicon esculentum
• Momordica balsamina
• Nicotiana debneyi
• Nicotiana glutinosa
• Nicotiana rustica
• Nicotiana sylvestris
• Petunia × hybrida
• Phaseolus vulgaris
• Physalis floridana
• Pisum sativum
• Raphanus sativus
• Sorghum bicolor
• Spinacia oleracea
• Tetragonia tetragonioides
• Trifolium incarnatum
• Trifolium pratense
• Trifolium repens
• Triticum aestivum
• Vigna unguiculata

Families containing susceptible hosts

• Chenopodiaceae (3/5)
• Convolvulaceae (3/3)
• Solanaceae (5/12)

Families containing insusceptible hosts

• Amaranthaceae (2/2)
• Chenopodiaceae (3/5)
• Compositae (1/1)
• Cruciferae (3/3)
• Cucurbitaceae (3/3)
• Gramineae (5/5)
• Leguminosae-Papilionoideae (7/7)
• Solanaceae (8/12)
• Tetragoniaceae (1 /1)

Sources of host-range data

Liao et al. (1979).

Physical and biochemical properties

Properties of particles in sap

TIP: 60-65 °C (in Nicotiana benthamiana sap). LIV: 0.6-1 days (at 25ºC). DEP: log₁₀ minus 2-3. Leaf sap contains few virions.

Purification method

Liao et al. (1979).

Particle morphology

Virions filamentous; usually flexuous; with a clear modal length; of 700-750 nm. Axial canal obscure. Basic helix obvious.

NCBI sequence data (Entrez search)

Sequence database accession code(s)

• Z26135 Em(40)_vi:SPLVCCP Gb(84)_vi:SPLVCCP Sweet potato latent virus (China) coat protein gene (partial). 9/93 423bp.
• Z26136 Em(40)_vi:SPLVTCP Gb(84)_vi:SPLVTCP Sweet potato latent virus (Taiwan) coat protein gene (partial). 9/93 426bp.
• X84011 Em(43)_vi:Splvchicp Gb(89)_vi:Splvchicp Sweet potato latent virus mRNA for coat protein (Chinese). 1/95 1,072bp.
• X84012 Em(43)_vi:Splvtwacp Gb(89)_vi:Splvtwacp Sweet potato latent virus mRNA for coat protein (Taiwan). 1/95 1,076bp.

Features of proteins

Virion protein(s) one; M_r 36000. Method of preparation: Brunt: proteins identified by SDS polyacrylamide gel electrophoresis.

Replication

Replication does not depend on a helper virus.

Cytopathology

Virions found in all parts of the host plant. Inclusions present in infected cells; are crystals in the nucleus and pinwheels.

Taxonomy and relationships

unassigned potyvirus

Virus(es) with serologically unrelated virions

Sweet potato feathery mottle virus and several other potyviruses.

Comments and References

References

• Liao, C.H., Chien, K., Chung, M.L., Chiu, R.J. and Han, Y.H. (1979). J. agric. Res. China 28: 127.
• Liao, C.H., Tsay, H.S. and Lu, Y.C. (1982). J. agric. Res. China 31: 239.

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.