Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Colocasia bobone disease (?) rhabdovirus

Index

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

Data collated by R. Plumb, 1984. Revised by A.A. Brunt, 1990.

Nomenclature

Acronym

CBDV

ICTV decimal code

62.U.P.0.012

Host range and symptoms

Natural host range and symptoms

Symptoms disappear soon after infection.
• Colocasia esculenta - thickened malformed and brittle leaves, severe stunting.

Transmission

Transmitted by a vector; an insect; Tarophagus proserpina; Delphacidae. Transmitted in a persistent manner. Virus not transmitted by mechanical inoculation; not transmitted by contact between plants; not transmitted by seed; not transmitted by pollen.

Geographical distribution

Spreads in Papua New Guinea and the Solomon Islands.

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Colocasia esculenta - malformation, puckering and thickening of leaves followed by recovery.
• Philodendron selloum - leaf chlorosis.

Diagnostically insusceptible host species

no natural infection recorded in Xanthosoma sp., Caladium sp., Cyrtosperma sp., Alocasia sp. and not transmitted to Tetragonia tetragonioides.

Maintenance and propagation hosts

Colocasia esculenta.

Assay hosts (Local lesions or Whole plants)

Colocasia esculenta (W).

Susceptible host species

• Colocasia esculenta
• Philodendron selloum

Insusceptible host species

• Alocasia
• Caladium
• Cyrtosperma
• Tetragonia tetragonioides
• Xanthosoma

Families containing susceptible hosts

• Araceae (2/6)

Families containing insusceptible hosts

• Araceae (4/6)
• Tetragoniaceae (1/1)

Sources of host-range data

Gollifer et al. (1977); Shaw et al. (1979).

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains few virions (generally, but often aggregated).

Purification method

James et al. (1973).

Particle morphology

Virions rhabdo- or bullet-shaped; not enveloped; with a clear modal length; of 300-335 nm; 50-55 nm wide. Axial canal obvious (can be seen in broken virions); 7 nm in diameter. Basic helix obvious; pitch of basic helix 4.5 nm.

Physical properties

Sedimentation coefficient 285 S (»15).

Cytopathology

Virions found in mesophyll and phloem sieve tubes; in the perinuclear space. Inclusions present in infected cells; are viroplasms; they contain virions. Other cellular changes: formation of crystalline arrays of virions.

Taxonomy and relationships

Possible unassigned rhabdovirus

Differences between type strain and others

Isolates that differ in virulence are found in different Pacific Island countries.

Comments and References

General comments

"Male" taro plants in Papua New Guinea and Solomon Islands also containing taro badnavirus develop a very severe disease described as "alomae".

References

• Gollifer, D.E. and Brown, J.E. (1972). Pl. Dis. Reptr 56: 597.
• Gollifer, D.E., Jackson, G.V.H., Dabek, A.J., Plumb, R.T. and May, Y.Y. (1977). PANS 23: 171.
• Jackson, G.H.V. (1980). Diseases and Pests of Taro. South Pacific Commission, Noumea.
• James, M., Kenten, R.H. and Woods, R.D. (1973). J. gen. Virol. 21: 145.
• Kenten, R.H. and Woods, R.D. (1973). PANS 19: 38.
• Shaw, D.E., Plumb, R.T. and Jackson, G.V.H. (1979). Papua New Guinea agric. J. 30: 71.

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.