Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Fabaviruses: Comoviridae

Index

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

Nomenclature

ICTV reference

ICTV decimal code 18.0.2.

Definitive species

• Broad bean wilt fabavirus
• Lamium mild mottle fabavirus

Host range and symptoms

Natural host range and symptoms

Symptoms vary seasonally (1/1).

Transmission

Transmitted by a vector; an insect; Aphididae. Transmitted in a non-persistent manner. Virus transmitted by mechanical inoculation; not transmitted by seed (1/1).

Experimental host range

Many (>9) families susceptible (1), or several (3-9) families susceptible (1).

Susceptible host species

• Amaranthus caudatus (1)
• Antirrhinum majus (1)
• Ballota nigra (1)
• Beta vulgaris (1)
• Brassica campestris (1)
• Brassica campestris ssp. rapa (1)
• Calendula officinalis (1)
• Capsella bursa-pastoris (1)
• Capsicum frutescens (1)
• Chenopodium album (1)
• Chenopodium amaranticolor
• Chenopodium foliosum (1)
• Chenopodium hybridum (1)
• Chenopodium quinoa
• Cucumis sativus (1)
• Cyamopsis tetragonoloba (1)
• Datura metel (1)
• Datura stramonium
• Glycine max (1)
• Gomphrena globosa
• Lactuca sativa (1)
• Lamium album (1)
• Lamium purpureum (1)
• Lathyrus odoratus (1)
• Lupinus angustifolius (1)
• Marrubium peregrinum (1)
• Marrubium vulgare (1)
• Matthiola incana (1)
• Nicandra physalodes (1)
• Nicotiana clevelandii
• Nicotiana debneyi (1)
• Nicotiana glutinosa
• Nicotiana megalosiphon (1)
• Nicotiana rustica
• Nicotiana sylvestris (1)
• Nicotiana tabacum
• Nicotiana × edwardsonii (1)
• Ocimum basilicum
• Petroselinum crispum (1)
• Petunia × hybrida
• Phaseolus vulgaris
• Physalis floridana
• Physalis peruviana (1)
• Pisum sativum (1)
• Plantago lanceolata (1)
• Primula obconica (1)
• Solanum nigrum (1)
• Spinacia oleracea (1)
• Tetragonia tetragonioides (1)
• Tropaeolum majus
• Vicia faba
• Vigna unguiculata (1)

Insusceptible host species

• Beta vulgaris (1)
• Brassica campestris ssp. chinensis (1)
• Brassica oleracea var. botrytis (1)
• Cajanus cajan (1)
• Capsicum annuum
• Chenopodium amaranticolor (1)
• Coleus blumei (1)
• Cucumis melo (1)
• Helianthus annuus (1)
• Lycopersicon esculentum
• Lycopersicon pimpinellifolium (1)
• Pelargonium zonale (1)
• Phaseolus lunatus (1)
• Raphanus sativus (1)
• Solanum capsicastrum (1)
• Solanum melongena (1)
• Solanum tuberosum (1)
• Sonchus oleraceus (1)
• Vigna unguiculata (1)
• Zinnia elegans (1)

Families containing susceptible hosts

• Amaranthaceae
• Chenopodiaceae
• Compositae (1)
• Cruciferae (1)
• Cucurbitaceae (1)
• Labiatae
• Leguminosae-Papilionoideae
• Plantaginaceae (1)
• Primulaceae (1)
• Scrophulariaceae (1)
• Solanaceae
• Tetragoniaceae (1)
• Tropaeolaceae
• Umbelliferae (1)

Families containing insusceptible hosts

• Chenopodiaceae
• Compositae (1)
• Cruciferae
• Cucurbitaceae (1)
• Geraniaceae (1)
• Labiatae (1)
• Leguminosae-Papilionoideae
• Solanaceae

Physical and biochemical properties

Properties of particles in sap

TIP: 55-57.5-60 °C. LIV: 3-3.5-4 days. DEP: log₁₀ minus 4-5 (1/1). Leaf sap contains many virions (1/1).

Particle morphology

Virions isometric; not enveloped; 25-27.25-32 nm in diameter; angular in profile; without a conspicuous capsomere arrangement.

Physical properties

Three sedimenting components in purified preparations; sedimentation coefficient 126 S; of the other(s) 63-81.5-100 S. Density 1.39-1.415-1.44 g cm^-3 in CsCl. A₂₆₀/A₂₈₀ ratio 0.86-1.525-1.79.

Biochemical properties

Virions contain 0-16.5-33 % nucleic acid; 67-83.5-100 % protein; 0 % lipid.

Genome consists of RNA (1/1); single-stranded (1/1); linear (1/1). Total genome size 10.8 kb. Genome of two parts (1/1); largest (or only) genome part 6.3 kb; the 2nd largest 4.5 kb. Base composition 26 % G; 30 % A; 17.5 % C; 26.5 % U. Infectivity retained when deproteinised with phenol or detergent (1/1).

NCBI sequence data (Entrez search)

Features of proteins

Virion protein(s) two; M_r 42000-43500-45000. M_r of 2nd largest 26000-27250-28500.

Replication

Replication does not depend on a helper virus.

Cytopathology

Virions found in cytoplasm. Inclusions present in infected cells (1/1); are crystals in the cytoplasm (1/1), or amorphous X-bodies (1/1); they contain virions (1/1).

Taxonomy and relationships

Viral family : Comoviridae.

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