Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Coconut foliar decay nanavirus

Index

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

Data collated by J.W. Randles, 1989.

Nomenclature

Acronym

CFDV

ICTV decimal code

79.0.P.1.002

Host range and symptoms

Natural host range and symptoms

• Cocos nucifera - necrosis.

Transmission

Transmitted by a vector; an insect; Cixiidae: Myndus crudus; an unusual insect group. Transmitted in a semi-persistent manner, or in a persistent manner. Virus not transmitted by mechanical inoculation; not transmitted by grafting (coconuts will not graft).

Geographical distribution

Spreads in Vanuatu.

Experimental host range

Experimentally infected plants mostly show progressive yellowing and necrosis.

Diagnostically susceptible host species and symptoms

• Cocos nucifera.

Maintenance and propagation hosts

Cocos nucifera.

Assay hosts (Local lesions or Whole plants)

Cocos nucifera cv. Malayan Red Dwarf (W).

Susceptible host species

• Cocos nucifera

Families containing susceptible hosts

• Palmae (1/1)

Physical and biochemical properties

Properties of particles in sap

Electron microscopy: virions not seen in sap extracts.

Purification method

Randles and Hanold (1989).

Particle morphology

Virions isometric; 20 nm in diameter; angular in profile; without a conspicuous capsomere arrangement.

Physical properties

Density 1.21-1.25 g/ml in Nycodenz; 1.30 g/ml in CS₂SO₄.

Biochemical properties

Genome consists of DNA; single-stranded; circular. Total genome size 1.29 kb. Genome possibly unipartite; largest (or only) genome part 1.29 kb.

NCBI sequence data (Entrez search)

Sequence database accession code(s)

• M29963 Em(40)_vi:CFDCG Gb(84)_vi:CFDCG Coconut foliar decay virus, complete genome. 7/90 1,291bp. 1 sequence.

Cytopathology

Virions found in leaves, roots and meristem.

Taxonomy and relationships

nanavirus

Additional comments on relationships

Resembles subterranean clover stunt, banana bunchy top, milk vetch dwarf and faba bean necrotic yellows viruses, and also porcine circovirus, in the size of its circular single stranded DNA genome; but the latter does not hybridize with that of subterranean clover stunt virus in dot blot hybridization tests.

Best tests for diagnosis

Isolate and characterize DNA.

Comments and References

References

• Calvez, C., Renard, J.L. and Marty, G. (1980). Oleagineux 35: 443.
• Randles, J.W. and Hanold, D. (1989). Intervirology 30: 177.
• Rohde, W., Randles, J.W. and Langridge, P. (1990). Virology 176: 648.

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.