Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Dendrobium vein necrosis (?) closterovirus

Index

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

Data collated by D.E. Lesemann, 1989.

Nomenclature

Acronym

DVNV

ICTV decimal code

17.0.1.T.1.02

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Dendrobium phalaenopsis - vein necrosis in leaves, petals and sepals.

Geographical distribution

Found, but with no evidence of spread, in Germany, but only in two glasshouses.

Susceptible host species

• Dendrobium phalaenopsis

Families containing susceptible hosts

• Orchidaceae (1/1)

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains few virions. Electron microscopy: mount sap in 2% PTA, pH 7.

Particle morphology

Virions filamentous; not enveloped; usually flexuous; very with a clear modal length; of 1865 nm; 10-12 nm wide. Axial canal obvious (but indistinct). Basic helix obvious.

Cytopathology

Virions found in leaves, mesophyll, epidermis and parenchyma surrounding the vascular bundle and in the petals and sepals of the flowers; in cytoplasm. Inclusions present in infected cells; are unusual in shape; are bundles of virions; they contain virions. Other cellular changes: peripheral vesiculation of mitochondria.

Taxonomy and relationships

Possible Closterovirus

Comments and References

References

• Lesemann, D.-E. (1977). Phytopath. Z. 89: 330.

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.