Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Milk vetch dwarf nanavirus

Index

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

Data collated by T. Inouye, 1981. Revised 1984.

Nomenclature

Acronym

MVDV

ICTV decimal code

39.0.1.T.007

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Astragalus sinicus, Glycine max, Phaseolus vulgaris, Pisum sativum, Vicia faba - yellow dwarf and leaf rolling.

Transmission

Transmitted by a vector; an insect; Aphis craccivora, A. gossypii, Acyrthosiphon pisum, Acyrthosiphon (Aulocorthum) solani; Aphididae. Transmitted in a persistent manner. Virus retained when the vector moults; not transmitted by mechanical inoculation; transmitted by grafting.

Geographical distribution

Spreads in Japan.

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Spinacia oleracea, Vigna unguiculata ssp. sesquipedalis - leaf rolling, stunting.
• Astragalus sinicus, Vicia sativa - yellow dwarf.
• Phaseolus vulgaris - stunting.
• Pisum sativum, Vicia faba - yellow dwarf, leaf roll.
• Datura stramonium - interveinal yellowing, leaf rolling.
• Nicotiana rustica - leaf rolling.

Maintenance and propagation hosts

Pisum sativum, Vicia faba.

Assay hosts (Local lesions or Whole plants)

Astragalus sinicus (W), Pisum sativum (W), Vicia faba (W).

Susceptible host species

• Arachis hypogaea
• Astragalus sinicus
• Cassia tora
• Crotalaria spectabilis
• Datura stramonium
• Glycine max
• Lathyrus odoratus
• Medicago sativa
• Melilotus albus
• Nicotiana glutinosa
• Nicotiana rustica
• Nicotiana tabacum
• Phaseolus vulgaris
• Pisum sativum
• Spinacia oleracea
• Trifolium incarnatum
• Trifolium subterraneum
• Vicia faba
• Vicia sativa
• Vicia villosa
• Vigna angularis
• Vigna unguiculata
• Vigna unguiculata ssp. sesquipedalis

Insusceptible host species

• Chenopodium amaranticolor
• Cucumis sativus
• Gomphrena globosa
• Lycopersicon esculentum
• Petunia × hybrida
• Tetragonia tetragonioides
• Trifolium hybridum
• Trifolium pratense
• Trifolium repens

Families containing susceptible hosts

• Chenopodiaceae (1/2)
• Leguminosae-Caesalpinioideae (1/1)
• Leguminosae-Papilionoideae (17/20)
• Solanaceae (4/6)

Families containing insusceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (1/2)
• Cucurbitaceae (1/1)
• Leguminosae-Papilionoideae (3/20)
• Solanaceae (2/6)
• Tetragoniaceae (1/1)

Sources of host-range data

Inouye et al. (1968).

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains few virions.

Purification method

Ohki et al. (1975).

Particle morphology

Virions isometric; not enveloped; 26 nm in diameter; angular in profile; without a conspicuous capsomere arrangement.

Cytopathology

Virions found in phloem; in cytoplasm and in cell vacuoles. Inclusions absent from infected cells. Other cellular changes: an increase of mitochondria.

Taxonomy and relationships

nanavirus

Virus(es) with serologically related virions

Faba bean necrotic yellows virus, closely (Katul et al., 1993.

Virus(es) with serologically unrelated virions

This virus was previously considered to be a luteovirus, but is now known to share properties with subterranean clover stunt and related viruses. Its virions are very closely serologically related to those of faba bean necrotic yellows virus (Katul et al., 1993) but, at present, they are listed as separate species, rather than related strains.

Comments and References

References

• Asada, Ohki, S.T., Osaki, T. and Inouye, T. (1984). Shokubutsu Boeki 38: 184.
• Katul, L., van Vetten, H.J., Maiss, E., Makkouk, K.M., Lesemann, D.-E. and Casper, R. (1993) Ann. appl. Biol. 123: 629.
• Inouye et al. (1968). Ann. Phytopath. Soc. Japan 34: 28.
• Ohki, S.T. (1975). Ann. Phytopath. Soc. Japan 41: 508.

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.