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Descriptions and Lists from the VIDE Database

Sweet potato feathery mottle potyvirus

Index

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

Data collated by R.N. Campbell, 1984; F. Nienhaus, 1987. Revised 1989 by J.W. Moyer.

Nomenclature

Synonyms

sweet potato chlorotic leaf spot virus, sweet potato internal cork virus, sweet potato russet crack virus, sweet potato virus A (Hollings et al., 1976; Sheffield, 1957).

Acronym

SPFMV

Strains

russet crack strain and sweet potato vein-clearing virus.

ICTV decimal code

57.0.1.0.064

Host range and symptoms

Natural host range and symptoms

Symptoms disappear soon after infection (except for russet crack strain symptoms which persist on roots).
• Ipomoea spp. - vein clearing, vein feathering, chlorotic spots, in cv. Jersey also causes root necrosis if infected by russet crack strain.

Transmission

Transmitted by a vector; an insect; Aphis gossypii, A. craccivora, Lipaphis erysimi, Myzus persicae; Aphididae. Transmitted in a non-persistent manner. Virus transmitted by mechanical inoculation; transmitted by grafting; not transmitted by contact between plants; not transmitted by seed; not transmitted by pollen.

Geographical distribution

Probably distributed worldwide. Found, but with no evidence of spread, in Louisiana, U.S.A.

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Ipomoea incarnata, I. nil - systemic vein clearing, vein banding, ringspots.
• I. setosa - vein clearing followed by remission.

Maintenance and propagation hosts

Ipomoea batatas, I. incarnata, I. nil, I. purpurea, I. setosa, Nicotiana benthamiana (some strains).

Assay hosts (Local lesions or Whole plants)

Ipomoea setosa (W), I. nil (W), Chenopodium amaranticolor (L) for some isolates in certain environments.

Susceptible host species

• Chenopodium amaranticolor
• Ipomoea batatas
• Ipomoea incarnata
• Ipomoea nil
• Ipomoea purpurea
• Ipomoea setosa
• Nicotiana benthamiana

Insusceptible host species

• Beta vulgaris
• Brassica campestris
• Brassica juncea
• Chenopodium amaranticolor
• Chenopodium capitatum
• Chenopodium quinoa
• Cucumis sativus
• Cucurbita pepo
• Datura stramonium
• Gomphrena globosa
• Lycopersicon esculentum
• Nicotiana glutinosa
• Nicotiana tabacum
• Phaseolus vulgaris
• Raphanus sativus
• Vigna unguiculata

Families containing susceptible hosts

• Chenopodiaceae (1/4)
• Convolvulaceae (5/5)
• Solanaceae (1/5)

Families containing insusceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (4/4)
• Cruciferae (3/3)
• Cucurbitaceae (2/2)
• Leguminosae-Papilionoideae (2/2)
• Solanaceae (4/5)

Sources of host-range data

Campbell et al. (1974); Moyer and Kennedy (1978).

Physical and biochemical properties

Properties of particles in sap

TIP: 60-65 °C. LIV: 0.3-0.5 days (7-12 hours). DEP: log₁₀ minus 3-4. Leaf sap contains few virions.

Purification method

Moyer and Kennedy (1978); Cali and Moyer (1981); Cadena-Hinojosa and Campbell (1981a); Loebenstein et al. (1988).

Particle morphology

Virions filamentous; not enveloped; usually flexuous; with a clear modal length; of 830-850 nm. Axial canal obscure. Basic helix obscure.

Physical properties

One sedimenting component in purified preparations.

Biochemical properties

Genome consists of RNA; single-stranded; linear. Total genome size 11.6 kb. Genome unipartite; largest (or only) genome part 11.6 kb. Genomic nucleic acid isolated by Moyer and Cali (1985). Poly A region present. Additional factor not required for infectivity.

NCBI sequence data (Entrez search)

Sequence database accession code(s)

• D16664 Em(40)_vi:SPFNIBCP Gb(84)_vi:SPFNIBCP Sweet potato feathery mottle virus 3´ terminal region. 4/94 2,290bp.
• S43450 Em(40)_un:S43450 Gb(84)_vi:S43450 capsid protein sweetpotato feathery mottle virus SPFMV, RC, mRNA Partial, 1196 nt. 2/93 1,1
• S43451 Em(40)_un:S43451 Gb(84)_vi:S43451 capsid protein sweetpotato feathery mottle virus SPFMV, C, mRNA Partial, 1196 nt. 2/93 1,19
• S69825 Gb(84)n:S69825 NIb-CP region: polyprotein...CP=coat/capsid protein sweet potato feathery mottle virus SPFMV
• S69826 Gb(84)n:S69826 NIa-NIb region: polyprotein...NIb=RNA polymerase/nuclear inclusion b protein.

Features of proteins

Virion protein(s) one; M_r 38000. Method of preparation: Moyer and Cali (1985).

Cytopathology

Virions found in all parts of the host plant; in cytoplasm. Inclusions present in infected cells; are pinwheels; they do not contain virions (Lawson et al., 1971; Nome et al., 1974).

Taxonomy and relationships

Potyvirus: Potyviridae

Best tests for diagnosis

Graft sweet potato to Ipomoea setosa and check it serologically.

Comments and References

References

• Cadena-Hinojosa, M.A. and Campbell, R.N. (1981a). Phytopathology 71: 1086.
• Cadena-Hinojosa, M.A. and Campbell, R.N. (1981b). Plant Dis. 65: 412.
• Cali, B.B. and Moyer, J.W. (1981). Phytopathology 71: 302.
• Campbell, R.N., Hall, D.H. and Mielinis, N.M. (1974). Phytopathology 64: 210.
• Clark, C.A., Derrick, K.S., Pace, C.S. and Watson, B. (1986). Plant Dis. 70: 931.
• Cohen, J., Salomon, R. and Loebenstein, G. (1988). Phytopathology 78: 809.
• Doolittle, S.P. and Harter, L.L. (1945). Phytopathology 35: 695.
• Esbenshade, P.R. and Moyer, J.W. (1982). Plant Dis. 66: 911.
• Hollings, M., Stone, O.M. and Bock, K.R. (1976). Ann. appl. Biol. 82: 511.
• Kennedy, G.G. and Moyer, J.W. (1982). J. econ. Ent. 75: 130.
• Lawson, R.H., Hearon, S.S. and Smith, F.F. (1971). Virology 46: 453.
• McLean, D.L. (1959). J. econ. Ent 52: 1057.
• Moyer, J.W. and Cali, B.B. (1985). J. gen. Virol. 66: 1185.
• Moyer, J.W. and Kennedy, G.G. (1978). Phytopathology 68: 998.
• Nome, S.F., Shalla, T.A. and Petersen, L.J. (1974). Phytopath. Z. 79: 169.
• Sheffield, F.M.L. (1957). Phytopathology 47: 582.

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.