Plant Viruses
Online 
Descriptions and Lists from
the VIDE Database
Phytoreoviruses:
Reoviridae
Index
Nomenclature
ICTV reference
Definitive species
Tentative species
Host range and
symptoms
Natural host range and symptoms
Transmission
Transmitted by a vector (4/4); an insect
(4/4); Cicadellidae (4/4). Transmitted in a persistent manner (4/4). Virus
retained when the vector moults (3/3); multiplies in the vector (4/4);
transmitted congenitally to the progeny of the vector (3/4), or not transmitted
congenitally to the progeny of the vector (1/4); not transmitted by mechanical
inoculation (4/4); not transmitted by contact between plants (3/3); not
transmitted by seed (4/4); not transmitted by pollen (2/2).
Experimental host range
Many (>9) families susceptible
(1/3), or few (<3) families susceptible (2/3).
Susceptible
host species
Insusceptible host species
Families containing susceptible hosts
Families containing
insusceptible hosts
Physical and
biochemical properties
Properties of particles in sap
TIP:
45-55.83-60 °C. LIV: 4-7-10 days. DEP: log10 minus 3-4 (1/2), or 6 (1/2).
Infectivity of sap not changed by treatment with di-ethyl ether (1/1). Leaf
sap contains few virions (1/2), or contains many virions (1/2).
Particle morphology
Virions isometric (4/4); not
enveloped (2/2); 60-67-73 nm in diameter; angular in profile (3/3); with a
conspicuous capsomere arrangement (2/3), or without a conspicuous capsomere
arrangement (1/3).
Physical properties
One sedimenting component in purified
preparations (1/3), or two sedimenting components in purified preparations
(2/3); sedimentation coefficient 510 S. Density 1.26-1.385-1.46 g
cm-3 in CsCl. A260/A280 ratio 1.4-1.41-1.42.
Biochemical properties
Virions contain 20-21-22 % nucleic
acid; 78-79-80 % protein.
Genome consists of RNA (3/3); double-stranded (3/3); linear (1/1). Total
genome size 25.13-25.19-25.27 kb. Genome of 12 parts (3/3); largest (or only)
genome part 4.131-4.302-4.423 kb; the 2nd largest 3.385-3.434-3.532 kb; the 3rd
largest 3.195-3.201-3.205 kb; the 4th largest 2.468-2.511-2.565 kb; the 5th
largest 2.47-2.551-2.613 kb; the 6th largest and other parts 1.699-1.715-1.726
kb. Base composition 21.8-22.3-22.8 % G; 27.8-28.1-28.4 % A; 21.4-21.5-21.6 % C;
28-28.1-28.2 % U. Base composition of ds genome 39-42.1-48.1 % (G + C). 5´
terminus of RNA has an unusual type (1/1). Infectivity decreased when
deproteinised with proteases (1/1); lost when deproteinised with phenol or
detergent (2/2). Poly A region absent (1/1).
Features of the genome
Sub-genomic mRNA not
found in infected cells (1/1).
Features of proteins
Virion protein(s) six (1/3), or
7 (2/3); Mr 182900-196400-209900. Mr of 2nd largest
164900-174900-184900. Mr of 3rd largest 149900-157400-164900.
Mr of 4th largest 113900-128400-142900. Mr of 5th largest
55000-87500-119900. Mr of 6th largest and smaller, 45000-48250-56000.
Replication
Genome replicates in cytoplasm (1/1).
Replication does not depend on a helper virus (2/2).
Cytopathology
Virions found in cytoplasm (3/3), or in
cell vacuoles (1/3). Inclusions present in infected cells (3/3); are viroplasms
(2/3), or unusual in shape (1/3); they contain virions (1/2), or they do not
contain virions (1/2).
Taxonomy and
relationships
Viral family : Reoviridae.
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: 20th August 1996.' URL
http://biology.anu.edu.au/Groups/MES/vide/
Dallwitz (1980)
and
Dallwitz, Paine and Zurcher (1993)
should also be cited.
Please send comments, corrections and suggestions to:
vide-manager@biology.anu.edu.au