Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Guar top necrosis virus

Index

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

Data collated by J.P. Varma, 1981.

Nomenclature

Strains

type and attenuated.

ICTV decimal code

79.0.P.DE.19

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Cyamopsis tetragonoloba - chlorotic leaf mottling and yellowing, chlorotic depressions then systemic necrosis and bronzing killing plant.

Transmission

Virus transmitted by mechanical inoculation.

Geographical distribution

Spreads in India.

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Glycine max - systemic necrosis, starting at tips and margins of leaves and spreading to whole plant.
• Phaseolus vulgaris - systemic chlorotic mottling and stippling.
• Vigna radiata - systemic leaf curling and tip necrosis.
• V. unguiculata - chlorotic local lesions.
• Datura stramonium - chlorotic mottling, leaves leathery and rough.
• Nicotiana tabacum cv. White Burley - systemic mosaic.
• Petunia × hybrida - slight mottle.
• Solanum nigrum - systemic mosaic, mottle.

Maintenance and propagation hosts

Datura stramonium, Nicotiana tabacum cv. White Burley, Petunia × hybrida, Solanum nigrum.

Assay hosts (Local lesions or Whole plants)

Glycine max (W), Phaseolus vulgaris (W), Vigna radiata (W), V. unguiculata (L).

Susceptible host species

• Cyamopsis tetragonoloba
• Datura stramonium
• Glycine max
• Nicotiana tabacum
• Petunia × hybrida
• Phaseolus vulgaris
• Pisum sativum
• Solanum nigrum
• Vigna radiata
• Vigna unguiculata

Insusceptible host species

• Antirrhinum majus
• Beta vulgaris
• Brassica oleracea var. capitata
• Capsicum frutescens
• Catharanthus roseus
• Cucumis sativus
• Lycopersicon esculentum
• Macrotyloma uniflorum
• Nicotiana glutinosa
• Nicotiana tabacum
• Raphanus sativus
• Vigna radiata
• Vigna unguiculata
• Zinnia elegans

Families containing susceptible hosts

• Leguminosae-Papilionoideae (6/7)
• Solanaceae (4/7)

Families containing insusceptible hosts

• Apocynaceae (1/1)
• Chenopodiaceae (1/1)
• Compositae (1/1)
• Cruciferae (2/2)
• Cucurbitaceae (1/1)
• Leguminosae-Papilionoideae (3/7)
• Scrophulariaceae (1/1)
• Solanaceae (4/7)

Sources of host-range data

Verma et al. (1962).

Physical and biochemical properties

Properties of particles in sap

TIP: 70 °C. LIV: 7 days. DEP: log₁₀ minus 3.

Taxonomy and relationships

(ungrouped)

Differences between type strain and others

The attenuated strain causes mottling, leaf malformation and stunting.

Comments and References

References

• Verma, G.S., Varma, J.P. and Saxena, P.N. (1962). Proc. Natl. Acad. Sci. India 32B: 287.

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.