Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Malva vein clearing potyvirus

Index

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

Data collated by G.R. Johnstone, 1987.

Nomenclature

Synonyms

malva green mosaic virus, malva yellow vein mosaic virus, malva mosaic virus.

Acronym

MVCV

Strains

Hein (1957) distinguishes two strains, that are the yellow vein mosaic and green mosaic strains of Costa and Duffus (1957).

ICTV decimal code

57.0.1.T.049

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Malva neglecta, M. nicaensis, M. parviflora, M. rotundifolia, M. sylvestris, Lavatera assurgentiflora, L. cretica, L. trimestris - vein clearing and yellow mosaic.

Transmission

Transmitted by a vector; an insect; Aphis umbrella (syn. Aphis malvae Koch) and Myzus persicae are vectors, whereas Acyrthosiphon solani, Coloradoa rufomaculata, Macrosiphum euphorbiae, Myzus ornatus, M. ascalonicus and Aulocorthum circumflexum are non-vectors; Aphididae. Transmitted in a non-persistent manner. Virus transmitted by mechanical inoculation.

Geographical distribution

Spreads in Australia (Tasmania), Brazil, the former Czechoslovakia, Germany, Israel, Italy, Portugal, the USA (California), the former USSR, the former Yugoslavia.

Experimental host range

Few (<3) families susceptible (and only some genera of the Malvaceae are infected).

Diagnostically susceptible host species and symptoms

• Malva parviflora, M. neglecta, M. sylvestris, M. rotundifolia, Lavatera assurgentiflora.

Diagnostically insusceptible host species

Abelmoschus esculentus, Chenopodium amaranticolor, Cucumis sativus, Datura stramonium, Gossypium hirsutum.

Assay hosts (Local lesions or Whole plants)

Malva parviflora (W); M. neglecta (W); M. sylvestris (W); M. rotundifolia (W); Lavatera assurgentiflora (W).

Susceptible host species

• Abutilon indicum
• Abutilon theophrasti
• Althaea officinalis
• Althaea sinensis
• Anoda cristata
• Anoda dillerriana
• Anoda lavateroides
• Gossypium barbadense
• Hibiscus cannabinus
• Hibiscus sabdariffa
• Hibiscus trionum
• Kitaibelia vitifolia
• Lavatera ambigua
• Lavatera arborea
• Lavatera assurgentiflora
• Lavatera cretica
• Lavatera trimestris
• Malva alcea
• Malva crispa
• Malva meluca
• Malva moschata
• Malva neglecta
• Malva nicaensis
• Malva parviflora
• Malva rotundifolia
• Malva sylvestris
• Malva verticillata
• Malvastrum capense
• Napaea dioica
• Sida napaeae
• Sida rhombifolia
• Sidalcea malvaefolia
• Urocarpidium peruvianum

Insusceptible host species

• Abelmoschus esculentus
• Althaea rosea
• Amaranthus retroflexus
• Armeria vulgaris
• Astrocarpa sesmoides
• Beta maritima
• Beta vulgaris
• Capsicum annuum
• Chenopodium amaranticolor
• Chenopodium quinoa
• Consolida ajacis
• Coriandrum sativum
• Cucumis sativus
• Cucurbita pepo
• Datura stramonium
• Gomphrena globosa
• Gossypium hirsutum
• Lamium purpureum
• Lycopersicon esculentum
• Melandrium nodiflorum
• Nicotiana glutinosa
• Nicotiana sylvestris
• Nicotiana tabacum
• Phaseolus vulgaris
• Salsola kali
• Scabiosa columbaria
• Schizanthus pinnatus
• Stellaria media

Families containing susceptible hosts

• Malvaceae (33/36)

Families containing insusceptible hosts

• Amaranthaceae (2/2)
• Caryophyllaceae (2/2)
• Chenopodiaceae (5/5)
• Cucurbitaceae (2/2)
• Dipsacaceae (1/1)
• Labiatae (1/1)
• Leguminosae-Papilionoideae (1/1)
• Malvaceae (3/36)
• Plumbaginaceae (1 /1)
• Ranunculaceae (1/1)
• Resedaceae (1/1)
• Solanaceae (7/7)
• Umbelliferae (1/1)

Sources of host-range data

Hein (1957); Horváth et al. (1979).

Physical and biochemical properties

Properties of particles in sap

TIP: 60-65 °C. LIV: 1-8 days. DEP: log₁₀ minus 2-3. Leaf sap contains few virions.

Particle morphology

Virions filamentous; not enveloped; usually flexuous; with a clear modal length; of 850-860 nm; 12 nm wide. Axial canal obscure. Basic helix obscure.

Physical properties

Presumably one sedimenting component in purified preparations.

Biochemical properties

Virions contain c. 5 % nucleic acid; c. 95 % protein.

Genome consists of RNA; single-stranded; linear; unipartite (presumably).

Features of proteins

Virus-coded non-virion proteins isolated; probably three proteins found. M_r coding for inclusion protein and helper component.

Cytopathology

Virions found in all parts of the host plant; in cytoplasm. Inclusions present in infected cells; are crystals in the cytoplasm, pinwheels, and unusual in shape; and scrolls; they do not contain virions.

Taxonomy and relationships

Potyvirus: Potyviridae

Comments and References

References

• Costa, A.S. and Duffus, J.E. (1957). Pl. Dis. Reptr 41: 1006
• Hein, A. (1957). Phytopath. Z. 28: 205.
• Horváth, J., Mamula, D., Besada, W.H. and Juretic, N. (1979). Phytopath. Z. 95: 51.

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.