Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Rice bunchy stunt (?) phytoreovirus

Index

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

Data collated by A.A. Brunt and H. Hibino, 1988.

Nomenclature

ICTV decimal code

60.0.8.T.DE.1

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Oryza sativa - most cultivars have short narrow mottled leaves, are severely stunted with increased tillering; intolerant cultivars also produce nodal branches and bunches of short narrow leaves which have the appearance of birds nests.

Transmission

Transmitted by a vector; an insect; Nephotettix virescens, N. cincticeps; Cicadellidae. Transmitted in a persistent manner. Virus multiplies in the vector; not transmitted congenitally to the progeny of the vector; not transmitted by mechanical inoculation; not transmitted by contact between plants; not transmitted by seed.

Ecology and control

Studies reported by Chen et al. (1978); Xie et al. (1979, 1980); Xie and Lin (1980, 1982). The virus occurs sporadically in rice fields; average incidence differs according to year, location and cultivar, it was less than 1% in 1974, 1975, 1980 and 1981, over 3% from 1976-1979 and highest (3.2%) in 1977, but has declined since 1981. Infected rice plants can over-winter and produce new leaves from which non-viruliferous leafhoppers can acquire virus. Viruliferous nymph and adult leafhoppers can also over-winter.

Geographical distribution

Spreads in China.

Diagnostically susceptible host species and symptoms

• Oryza sativa - symptoms as in naturally infected plants.

Maintenance and propagation hosts

Oryza sativa.

Assay hosts (Local lesions or Whole plants)

Oryza sativa (W).

Susceptible host species

• Oryza sativa

Families containing susceptible hosts

• Gramineae (1/1)

Physical and biochemical properties

Properties of particles in sap

TIP: 60 °C (in rice sap; determined by micro injection of vectors). LIV: 4 days (at 2ºC).

Particle morphology

Virions isometric; not enveloped; about 60 nm in diameter.

Cytopathology

Virions found in cells of leaves and roots.

Taxonomy and relationships

Possible Phytoreovirus: Reoviridae

Virus(es) with serologically unrelated virions

Rice dwarf virus.

Additional comments on relationships

No cross protection in rice plants previously infected with rice dwarf or rice ragged stunt viruses.

Comments and References

References

• Chen, S.H., Lin, H.Y., Xi, L.H. and Hu, F.P. (1978). Scientia Agric. Sinica 3: 79.
• Xie, L.H., Chen, Z.X. and Lin, Q.Y. (1979). Acta Phytopath. Sin. 9: 93.
• Xie, L.H. and Lin, J.Y. (1980). Kexue Tongbao 25: 786.
• Xie, L.H. and Lin, J.Y. (1982). Int. Rice Res. Newsl. 7: 6.
• Xie, L.H. and Lin, H.Y. (1983). Acta Phytopath. Sin. 13: 15.
• Xie, L.H., Lin, Q.Y. and Zhu, Q.L. (1982). Acta Phytopath. Sinica 12: 16.

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.