Plant Viruses
Online 
Descriptions and Lists from
the VIDE Database
Waikaviruses:
Sequiviridae
Index
Nomenclature
ICTV reference
Definitive species
Host range and
symptoms
Natural host range and symptoms
Transmission
Transmitted by a vector; an insect;
Aphididae (1), or Cicadellidae (2). Transmitted in a semi-persistent manner.
Virus lost by the vector when it moults (2/2); does not multiply in the vector
(2/2); not transmitted congenitally to the progeny of the vector (2/2); can help
the vector transmission of another virus (2/2); not transmitted by mechanical
inoculation; not transmitted by contact between plants (2/2); not transmitted by
seed (2/2); not transmitted by pollen (2/2).
Experimental host range
Few (<3) families susceptible.
Susceptible host species
Insusceptible host species
Families containing susceptible hosts
Families containing
insusceptible hosts
Physical and
biochemical properties
Properties of particles in sap
LIV: 45
days. Leaf sap contains few virions (1/2), or contains many virions (1/2).
Particle morphology
Virions isometric; not enveloped;
29-29.66-30 nm in diameter; rounded in profile (2), or angular in profile (1);
with a conspicuous capsomere arrangement (2), or without a conspicuous capsomere
arrangement (1).
Physical properties
One sedimenting component in purified
preparations (2), or two sedimenting components in purified preparations (1);
sedimentation coefficient 175-179-183 S. Density 1.27-1.484-1.551 g
cm-3 in CsCl. A260/A280 ratio 0.73-1.28-1.83.
Biochemical properties
Virions contain 0-28.5-42 %
nucleic acid; 58-71.5-100 % protein; 0 % lipid.
Genome consists of RNA; single-stranded; linear (1/1). Total genome size
10.6-10.63-10.67 kb. Genome unipartite; largest (or only) genome part
10.42-10.56-10.67 kb. Base composition 24 % G; 30 % A; 17 % C; 29 % U.
Features of proteins
Virion protein(s) one (1), or
two (1), or four (1); Mr 23000-29330-35000. Mr of 2nd
largest 18000-23460-28400. Mr of 3rd largest 24300. Mr of
4th largest 22300.
Replication
Acts as helper for another virus (1/1).
Cytopathology
Virions found in cytoplasm. Inclusions
present in infected cells (2), or absent from infected cells (1); are amorphous
X-bodies (1/2), or viroplasms (2/2), or unusual in shape (2/2); they contain
virions (2/2), or they do not contain virions (1/2).
Taxonomy and
relationships
Viral family : Sequiviridae.
Illustrations
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
