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Descriptions and Lists from the VIDE Database

Sweet potato mild mottle ipomovirus

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 T virus, sweet potato B virus (Hollings et al., 1976a; Sheffield, 1957).

Acronym

SPMMV

ICTV decimal code

57.0.U.1.001

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Ipomoea batatas - mild leaf mottling and stunting in intolerant cultivars, but symptomless infection in others. Some cultivars are immune.

Transmission

Transmitted by a vector; an insect; Bemisia tabaci; Aleyrodidae. Transmitted in a persistent manner. Virus transmitted by mechanical inoculation; transmitted by grafting; not transmitted by contact between plants; not transmitted by seed.

Ecology and control

Studies reported by Hollings et al. (1976a); Wambugu (1990).

Geographical distribution

Spreads in Burundi, Kenya, Tanzania, and Uganda.

Experimental host range

Many (>9) families susceptible.

Diagnostically susceptible host species and symptoms

• Nicotiana glutinosa, N. tabacum - vein clearing, leaf curling and deformation.
• Chenopodium quinoa - local lesions; not systemic.

Maintenance and propagation hosts

Nicotiana glutinosa, N. clevelandii, N. tabacum.

Assay hosts (Local lesions or Whole plants)

Chenopodium quinoa (L).

Susceptible host species

• Atriplex hortensis
• Beta vulgaris
• Celosia argentea
• Chenopodium murale
• Chenopodium quinoa
• Datura stramonium
• Gomphrena globosa
• Hyoscyamus niger
• Ipomoea batatas
• Lathyrus odoratus
• Lycopersicon esculentum
• Montia perfoliata
• Nicandra physalodes
• Nicotiana benthamiana
• Nicotiana clevelandii
• Nicotiana debneyi
• Nicotiana glutinosa
• Nicotiana glutinosa × N. clevelandii
• Nicotiana megalosiphon
• Nicotiana rustica
• Nicotiana tabacum
• Petunia × hybrida
• Phlox drummondii
• Primula malacoides
• Saponaria vaccaria
• Silene armeria
• Solanum nigrum
• Spinacia oleracea
• Tetragonia tetragonioides
• Torenia fournieri
• Trifolium incarnatum
• Zinnia elegans

Insusceptible host species

• Abelmoschus esculentus
• Ageratum conyzoides
• Amaranthus caudatus
• Antirrhinum majus
• Apium graveolens
• Arachis hypogaea
• Bellis perennis
• Brassica campestris ssp. pekinensis
• Brassica campestris ssp. rapa
• Brassica juncea
• Brassica oleracea var. capitata
• Calendula officinalis
• Capsicum frutescens
• Catharanthus roseus
• Cheiranthus cheiri
• Chenopodium capitatum
• Chrysanthemum morifolium
• Cucumis sativus
• Cucurbita maxima
• Cucurbita moschata
• Dianthus barbatus
• Dianthus caryophyllus
• Emilia sagittata
• Fagopyrum esculentum
• Glycine max
• Helianthus annuus
• Lactuca sativa
• Myosotis sylvatica
• Ocimum basilicum
• Phaseolus vulgaris
• Physalis floridana
• Phytolacca americana
• Pisum sativum
• Senecio vulgaris
• Solanum melongena
• Solanum tuberosum
• Stellaria media
• Triticum aestivum
• Tropaeolum majus
• Verbesina encelioides
• Vicia faba
• Vigna unguiculata
• Zea mays

Families containing susceptible hosts

• Amaranthaceae (2/3)
• Caryophyllaceae (2/5)
• Chenopodiaceae (5/6)
• Compositae (1/10)
• Convolvulaceae (1/1)
• Leguminosae-Papilionoideae (2/8)
• Polemoniaceae (1/1)
• Portulacaceae (1/1)
• Primulaceae (1 /1)
• Scrophulariaceae (1/2)
• Solanaceae (14/18)
• Tetragoniaceae (1/1)

Families containing insusceptible hosts

• Amaranthaceae (1/3)
• Apocynaceae (1/1)
• Boraginaceae (1/1)
• Caryophyllaceae (3/5)
• Chenopodiaceae (1/6)
• Compositae (9/10)
• Cruciferae (5/5)
• Cucurbitaceae (3/3)
• Gramineae (2/2)
• Labiatae (1 /1)
• Leguminosae-Papilionoideae (6/8)
• Malvaceae (1/1)
• Phytolaccaceae (1/1)
• Polygonaceae (1/1)
• Scrophulariaceae (1/2)
• Solanaceae (4/18)
• Tropaeolaceae (1/1)
• Umbelliferae (1/1)

Sources of host-range data

Hollings et al. (1976).

Physical and biochemical properties

Properties of particles in sap

TIP: 60 °C (in Nicotiana clevelandii sap). LIV: 3-7 days (at 18ºC), or 42-49 days (at 2ºC). DEP: log₁₀ minus 2-3.

Purification method

Hollings et al. (1976 a,b).

Particle morphology

Virions filamentous; of 800-950 nm.

Physical properties

One sedimenting component in purified preparations; sedimentation coefficient 155 S.

Biochemical properties

Virions contain 5 % nucleic acid; 95 % protein.

Genome consists of RNA; single-stranded.

NCBI sequence data (Entrez search)

Sequence database accession code(s)

• Z48058 Em(44)n:Spmmvrpcp Gb(90)_vi:Spmmvrpcp Sweet potato mild mottle virus mRNA. 6/95 2,109bp.

Features of proteins

Virion protein(s) one; M_r 37700; coat protein.

Cytopathology

Virions found in mesophyll and epidermis; in cytoplasm. Inclusions present in infected cells; are pinwheels; they do not contain virions.

Taxonomy and relationships

ipomovirus: Potyviridae

Virus(es) with serologically unrelated virions

Bean yellow mosaic, carnation vein mottle, clover yellow vein, henbane mosaic, hippeastrum mosaic, iris mild mosaic, pepper veinal mottle, potato Y, sweet potato feathery mottle, tobacco etch, turnip mosaic, watermelon mosaic 2 and narcissus yellow stripe viruses.

Comments and References

References

• Hollings, M., Stone, O.M. and Bock, K.R. (1971). Rep. Glasshouse Crops Res. Inst. 1970, p. 155.
• Hollings, M., Stone, O.M. and Bock, K.R. (1976a). Ann. appl. Biol. 82: 511.
• Hollings, M., Stone, O.M. and Bock, K.R. (1976b). CMI/AAB Descr. Pl. Viruses No. 162, 4 pp.
• Sheffield, F.M.L. (1957). Phytopathology 47: 582.
• Wambugu, F. (1990). Ph.D. Thesis, pp. 271. University of Bath, U.K.

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.