Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Enamoviruses

Index

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

Nomenclature

ICTV reference

ICTV decimal code 24.0.1.

Definitive species

• Pea enation mosaic enamovirus

Host range and symptoms

Natural host range and symptoms

Symptoms persist.

Transmission

Transmitted by a vector; an insect; Aphididae. Transmitted in a persistent manner. Virus retained when the vector moults; does not multiply in the vector; not transmitted congenitally to the progeny of the vector; can help the vector transmission of another virus; transmitted by mechanical inoculation; transmitted by seed.

Experimental host range

Several (3-9) families susceptible.

Susceptible host species

• Chenopodium album
• Chenopodium amaranticolor
• Chenopodium quinoa
• Cicer arietinum
• Lathyrus odoratus
• Lens culinaris
• Lespedeza stipulacea
• Lupinus albus
• Lupinus angustifolius
• Medicago arabica
• Medicago sativa
• Melilotus albus
• Nicotiana clevelandii
• Phaseolus vulgaris
• Pisum sativum
• Trifolium hybridum
• Trifolium incarnatum
• Trifolium repens
• Trifolium subterraneum
• Vicia faba
• Vicia sativa
• Vicia villosa

Insusceptible host species

• Cyamopsis tetragonoloba
• Gomphrena globosa
• Lotus corniculatus
• Medicago hispida
• Nicotiana rustica
• Sesbania exaltata
• Trifolium dubium
• Trifolium pratense

Families containing susceptible hosts

• Chenopodiaceae
• Leguminosae-Papilionoideae
• Solanaceae

Families containing insusceptible hosts

• Amaranthaceae
• Leguminosae-Papilionoideae
• Solanaceae

Physical and biochemical properties

Properties of particles in sap

TIP: 55-65 °C. LIV: 4 days. DEP: log₁₀ minus 4. Infectivity of sap not changed by treatment with di-ethyl ether. Leaf sap contains many virions.

Particle morphology

Virions isometric; not enveloped; 25-28 nm in diameter; rounded in profile, or angular in profile; without a conspicuous capsomere arrangement.

Physical properties

Two sedimenting components in purified preparations; sedimentation coefficient 112 S; of the other(s) 99 S. Density 1.436 g cm^-3 in CsCl. Isoelectric point pH 5-6. A₂₆₀/A₂₈₀ ratio 1.63.

Biochemical properties

Virions contain 28 % nucleic acid; 72 % protein; 0 % lipid.

Genome consists of RNA; single-stranded; linear. Total genome size 9.96 kb. Genome of two parts; largest (or only) genome part 5.71 kb; the 2nd largest 4.25 kb. Base composition 26.6 % G; 24.1 % A; 24.5 % C; 24.8 % U. 5´ terminus of RNA has a VPg. Infectivity lost when deproteinised with proteases. Poly A region absent.

NCBI sequence data (Entrez search)

Features of the genome

Non-genomic nucleic acid found in the virions; is satellite RNA.

Features of proteins

Virion protein(s) three; M_r 54000. M_r of 2nd largest 21000. M_r of 3rd largest 17500.

Cytopathology

Virions found in cytoplasm, or in nuclei, or in cell vacuoles. Inclusions present in infected cells; are unusual in shape; they contain virions.

Taxonomy and relationships

No data available.

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: 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.

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