Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Vanilla necrosis potyvirus

Index

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

Data collated by M.N. Pearson and S.P. Pone, 1989.

Nomenclature

ICTV decimal code

57.0.1.0.073

Host range and symptoms

Natural host range and symptoms

Symptoms persist (but symptoms patchy).
• Vanilla fragrans - chlorotic blotching or streaking and malformed margins of tip leaves which, as they age, develop brown scab-like and necrotic local lesions, which also form on the vines causing die-back.

Transmission

Transmitted by a vector; possibly an insect; Aphis gossypii and Myzus persicae; Aphididae. Transmitted in a non-persistent manner. Virus transmitted by mechanical inoculation; transmitted by grafting.

Geographical distribution

Spreads in Fiji and Tonga.

Experimental host range

Several (3-9) families susceptible. Experimentally infected plants mostly show systemic mosaics, mottles, ringspots or necrosis and leaf malformation.

Diagnostically susceptible host species and symptoms

• Nicotiana benthamiana - systemic vein chlorosis and malformed leaves.
• Nicotiana clevelandii - mild systemic mottling.
• Chenopodium amaranticolor - necrotic local lesions; not systemic.
• C. quinoa - diffuse chlorotic local lesions; not systemic.

Maintenance and propagation hosts

Nicotiana benthamiana, N. clevelandii.

Assay hosts (Local lesions or Whole plants)

Chenopodium amaranticolor (L), C. quinoa (L).

Susceptible host species

• Chenopodium amaranticolor
• Chenopodium quinoa
• Nicotiana benthamiana
• Nicotiana clevelandii
• Vanilla fragrans

Insusceptible host species

• Cassia occidentalis
• Cassia tora
• Chenopodium murale
• Colocasia esculenta
• Datura stramonium
• Gomphrena globosa
• Nicotiana glutinosa
• Nicotiana megalosiphon
• Nicotiana tabacum
• Phaseolus vulgaris
• Vigna unguiculata

Families containing susceptible hosts

• Chenopodiaceae (2/3)
• Orchidaceae (1/1)
• Solanaceae (2/6)

Families containing insusceptible hosts

• Amaranthaceae (1/1)
• Araceae (1/1)
• Chenopodiaceae (1/3)
• Leguminosae-Caesalpinioideae (2/2)
• Leguminosae-Papilionoideae (2/2)
• Solanaceae (4/6)

Comments on host-range

Chenopodium amaranticolor, C. quinoa and Nicotiana clevelandii only successfully infected from Nicotiana benthamiana but not directly from Vanilla fragrans.

Sources of host-range data

Pearson et al. (1990).

Physical and biochemical properties

Properties of particles in sap

TIP: 58-60 °C. LIV: 1-2 days. DEP: log₁₀ minus 4-5. Leaf sap contains few virions.

Purification method

Pearson et al. (1990).

Particle morphology

Virions filamentous; not enveloped; usually flexuous; with a clear modal length; of 775 nm. Axial canal obscure. Basic helix obscure.

Physical properties

One sedimenting component in purified preparations.

NCBI sequence data (Entrez search)

Features of proteins

Virion protein(s) one; M_r 32700; coat protein. Method of preparation: Pearson et al. (1990).

Cytopathology

Virions found in leaves and mesophyll; in cytoplasm. Inclusions present in infected cells; are pinwheels; they do not contain virions.

Taxonomy and relationships

Potyvirus: Potyviridae

Virus(es) with serologically unrelated virions

Alstroemeria mosaic, asparagus I, bean yellow mosaic, commelina Y, dasheen mosaic, hippeastrum mosaic, iris mild mosaic, iris severe mosaic, narcissus late season yellows, narcissus degeneration, narcissus yellow stripe, nerine yellow stripe, potato Y, turnip mosaic, tulip breaking, watermelon mosaic 2, yam mosaic and vanilla mosaic viruses.

Comments and References

References

• Pearson, M.N. and Pone, S.P. (1988). Australas. Pl. Path. 17: 59.
• Pearson, M.N., Brunt, A.A. and Pone, S.P. (1990). J. Phytopath. 128: 46.

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.