Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Passionfruit yellow mosaic tymovirus

Index

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

Data collated by E.W. Kitajima, 1985.

Nomenclature

Acronym

PFYMV (PaYMV)

ICTV decimal code

77.0.1.0.011

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Passiflora edulis f. flavicarpa - yellow mosaic, vein clearing.

Transmission

Transmitted by a vector; an insect; Diabrotica speciosa (experimental transmission); Coleoptera. Transmitted in a non-persistent manner. Virus transmitted by mechanical inoculation; transmitted by grafting; not transmitted by seed.

Geographical distribution

Spreads in Brazil.

Experimental host range

Few (<3) families susceptible.

Diagnostically susceptible host species and symptoms

• Several Passiflora spp., especially Passiflora edulis f. flavicarpa.

Maintenance and propagation hosts

Passiflora edulis f. flavicarpa.

Assay hosts (Local lesions or Whole plants)

Passiflora edulis f. flavicarpa (W). No local lesion host.

Susceptible host species

• Passiflora edulis
• Passiflora edulis f. flavicarpa

Families containing susceptible hosts

• Passifloraceae (2/2)

Comments on host-range

Limited to Passiflora spp.

Sources of host-range data

Crestani (1984).

Physical and biochemical properties

Properties of particles in sap

TIP: 55-60 °C. LIV: 8 days. DEP: log₁₀ minus 5. Infectivity of sap not changed by treatment with di-ethyl ether. Leaf sap contains many virions.

Purification method

Kitajima, adapted from Bozarth et al. (1977).

Particle morphology

Virions isometric; not enveloped; 28 nm in diameter; rounded in profile, or angular in profile; without a conspicuous capsomere arrangement.

Physical properties

Two sedimenting components in purified preparations; sedimentation coefficient of the fastest 125 S; of the other(s) 62 S.

Biochemical properties

Virions contain 25 % nucleic acid (or less).

Genome consists of RNA; single-stranded; linear. Total genome size 2 kb. Genome unipartite; largest (or only) genome part 2 kb. Genomic nucleic acid isolated by Aviv and Leder (1972).

Features of proteins

Virion protein(s) one; M_r 21000; coat protein. Method of preparation: Laemmli (1970).

Replication

Genome replicates perhaps in association with chloroplasts (in the peripheral vesicles). Coat protein mRNA translated in the cytoplasm, possibly. Replication does not depend on a helper virus.

Cytopathology

Virions found in all parts of the host plant; in cytoplasm and in cell vacuoles. Inclusions absent from infected cells. Other cellular changes: peripheral vesicles in the chloroplasts, which are characteristic for tymoviruses.

Taxonomy and relationships

Tymovirus

Virus(es) with serologically related virions

Okra mosaic, kennedya mosaic, clitoria yellow mosaic, cocoa yellow mosaic and turnip yellow mosaic viruses.

Comments and References

References

• Aviv, H. and Leder, P. (1972). Proc. Natl. Acad. Sci. U.S.A. 69: 1408.
• Bozarth, R.F., Lana, A.O., Koenig, R. and Reese, J. (1977). Phytopathology 67: 735.
• Crestani, O.A. (1984). M.Sc. Thesis, Univ. Brasilia.
• Crestani, O.A., Kitajima, E.W., Lin, M.T. and Marinho, V.L.A. (1986). Phytopathology 76: 951.
• Crestani, O.A., Kitajima, E.W., Lin, M.T., Marinho, V.L.A. and Pimentel, J.P. (1984). Fitopatol. Bras. 9: 394.
• Kitajima, E.W., Ribeiro, R.L.D., Lin, M.T., Ribeiro, M.I.S.D., Costa C.L. and Pimentel J.P. (1984). Fitopatol. Bras. 9: 607.
• Laemmli, U.K. (1970). Nature, Lond. 227: 680.

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.