Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Eucharis mottle (?) nepovirus

Index

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

Data collated by A.A. Brunt, 1987.

Nomenclature

ICTV decimal code

18.0.3.T.DE.2

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Eucharis candida - leaf mottling.

Transmission

Virus transmitted by mechanical inoculation; transmitted by seed.

Geographical distribution

Spreads in Peru.

Experimental host range

Many (>9) families susceptible.

Diagnostically susceptible host species and symptoms

• Celosia cristata - chlorotic local lesions, then systemic vein-banding and malformation.
• Chenopodium amaranticolor - local and systemic ringspots.
• Cucumis sativus - chlorotic and necrotic local lesions, then systemic mottling.
• Datura stramonium - local green rings, becoming systemic.
• Gomphrena globosa - systemic vein-banding and rings.
• Nicotiana tabacum - mostly symptomless.
• Phaseolus vulgaris - local lesions then systemic necrosis.
• Tetragonia tetragonioides - white necrotic rings.
• Vigna unguiculata - necrotic local lesions, then systemic necrosis.

Maintenance and propagation hosts

Nicotiana tabacum, Gomphrena globosa.

Assay hosts (Local lesions or Whole plants)

Chenopodium amaranticolor (L), Vigna unguiculata (L).

Susceptible host species

• Celosia cristata
• Chenopodium amaranticolor
• Cucumis sativus
• Cucurbita maxima
• Datura stramonium
• Eucharis candida
• Glycine max
• Gomphrena globosa
• Nicotiana bigelovii
• Nicotiana tabacum
• Phaseolus vulgaris
• Tetragonia tetragonioides
• Vigna unguiculata

Families containing susceptible hosts

• Amaranthaceae (2/2)
• Amaryllidaceae (1/1)
• Chenopodiaceae (1/1)
• Cucurbitaceae (2/2)
• Leguminosae-Papilionoideae (3/3)
• Solanaceae (3/3)
• Tetragoniaceae (1/1)

Sources of host-range data

Kahn et al. (1962).

Physical and biochemical properties

Properties of particles in sap

TIP: in sap of Gomphrena globosa or tobacco 65-75 °C. LIV: 6-10 days. DEP: log₁₀ minus 2-3.

Purification method

Kahn et al. (1962).

Particle morphology

Virions isometric; not enveloped; 26 nm in diameter; angular in profile.

Taxonomy and relationships

Possible Nepovirus: Comoviridae

Virus(es) with serologically related virions

Tobacco ringspot virus (several isolates).

Virus(es) with serologically unrelated virions

Arabis mosaic, the beet ringspot strain of tomato black ring and raspberry ringspot viruses.

Additional comments on relationships

Kahn et al. (1962) considered eucharis mottle virus to be a strain of tobacco ringspot virus. However, as its virions are serologically distinct and the two viruses fail to cross-protect and are unable to form pseudo-recombinants, it is considered to be a separate virus species (Gooding, 1970; Salazar and Harrison, 1978).

Comments and References

References

• Gooding, G.V. (1970). Phytopathology 60: 708.
• Kahn, R.F., Scott, H.A. and Monroe, R.L. (1962). Phytopathology 52: 1211.
• Salazar, L.F. and Harrison, B.D. (1978). Ann. appl. Biol. 90: 387.

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.