Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Sequiviruses: Sequiviridae

Index

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

Nomenclature

ICTV reference

ICTV decimal code 65.0.1.

Definitive species

• Dandelion yellow mosaic sequivirus
• Parsnip yellow fleck sequivirus

Host range and symptoms

Natural host range and symptoms

Symptoms persist.

Transmission

Transmitted by a vector; an insect; Aphididae. Transmitted in a semi-persistent manner (1/1). Virus lost by the vector when it moults (1/1); not transmitted congenitally to the progeny of the vector (1/1); requires, for vector transmission, a helper virus (1/1); transmitted by mechanical inoculation; not transmitted by seed (1/1); not transmitted by pollen (1/1).

Experimental host range

Several (3-9) families susceptible.

Susceptible host species

• Aethusa cynapium (1)
• Anethum graveolens (1)
• Anthriscus cerefolium (1)
• Anthriscus sylvestris (1)
• Apium graveolens (1)
• Beta vulgaris (1)
• Chaerophyllum temulum (1)
• Chenopodium amaranticolor
• Chenopodium ambrosioides (1)
• Chenopodium capitatum (1)
• Chenopodium murale
• Chenopodium quinoa
• Cichorium endiva (1)
• Coriandrum sativum (1)
• Cucumis sativus
• Datura stramonium (1)
• Daucus carota (1)
• Gomphrena globosa
• Heracleum sphondylium (1)
• Hyoscyamus niger (1)
• Lactuca sativa (1)
• Lactuca serriola (1)
• Lactuca virosa (1)
• Lycopersicon esculentum (1)
• Montia perfoliata (1)
• Nicotiana benthamiana
• Nicotiana clevelandii
• Nicotiana glutinosa
• Nicotiana rustica
• Nicotiana sylvestris (1)
• Nicotiana tabacum (1)
• Oenanthe aquatica (1)
• Pastinaca sativa
• Petroselinum crispum (1)
• Petunia × hybrida (1)
• Spinacia oleracea
• Taraxacum officinale (1)
• Tetragonia tetragonioides (1)
• Torilis japonica (1)

Insusceptible host species

• Apium graveolens (1)
• Brassica campestris ssp. pekinensis (1)
• Calendula officinalis (1)
• Cheiranthus cheiri (1)
• Foeniculum vulgare (1)
• Phaseolus vulgaris
• Pisum sativum (1)
• Senecio vulgaris (1)
• Sonchus oleraceus (1)
• Verbesina encelioides (1)
• Vigna unguiculata

Families containing susceptible hosts

• Amaranthaceae
• Chenopodiaceae
• Compositae (1)
• Cucurbitaceae
• Portulacaceae (1)
• Solanaceae
• Tetragoniaceae (1)
• Umbelliferae

Families containing insusceptible hosts

• Compositae
• Cruciferae
• Leguminosae-Papilionoideae
• Umbelliferae

Physical and biochemical properties

Properties of particles in sap

TIP: 57.5-61.87-65 °C. LIV: 1-3.25-7 days. DEP: log₁₀ minus 3 (1), or 4, or 5 (1). Leaf sap contains few virions (1/1).

Particle morphology

Virions isometric; not enveloped (1/1); 31 nm in diameter; rounded in profile (1/1); without a conspicuous capsomere arrangement (1/1).

Physical properties

One sedimenting component in purified preparations (1), or two sedimenting components in purified preparations (1); sedimentation coefficient 153-156-159 S; of the other(s) 60 S. Density 1.297-1.393-1.49 g cm^-3 in CsCl. A₂₆₀/A₂₈₀ ratio 1.46-1.597-1.67.

Biochemical properties

Virions contain 40 % nucleic acid.

Genome consists of RNA; single-stranded. Total genome size 9.871 kb. Genome unipartite; largest (or only) genome part 9.871-9.935-10 kb.

NCBI sequence data (Entrez search)

Features of proteins

Virion protein(s) three; M_r 29000-30700-32000. M_r of 2nd largest 25000-26370-29500. M_r of 3rd largest 22700-24100-27000.

Replication

Replication does not depend on a helper virus (1/1).

Cytopathology

Virions found in cytoplasm (1/1). Inclusions present in infected cells (1/1); are membranous bodies (1/1); they contain virions (1/1).

Taxonomy and relationships

Viral family : Sequiviridae.

Illustrations

Electron micrograph.

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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: 16^th January 1997.' URL http://biology.anu.edu.au/Groups/MES/vide/

Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993) should also be cited.

Please send comments, corrections and suggestions to: vide-manager@biology.anu.edu.au