Plant Viruses
Online 
Descriptions and Lists from
the VIDE Database
Monogeminiviruses: Geminiviridae
Index
Nomenclature
ICTV reference
Definitive species
Tentative species
Host range and
symptoms
Natural host range and symptoms
Transmission
Transmitted by a vector (10/10); an insect
(10/10); Cicadellidae (10/10). Transmitted in a non-persistent manner (1/8),
or in a semi-persistent manner (2/8), or in a persistent manner (6/8). Virus
retained when the vector moults (5/5); does not multiply in the vector (5/5);
not transmitted congenitally to the progeny of the vector (5/5); does not
require a helper virus for vector transmission (1/1); transmitted by mechanical
inoculation (1/10), or not transmitted by mechanical inoculation (9/10);
transmitted by grafting (1/3), or not transmitted by grafting (2/3); not
transmitted by contact between plants (5/5); transmitted by seed (1/6), or not
transmitted by seed (5/6); not transmitted by pollen (4/4).
Experimental host range
Many (>9) families susceptible
(1/9), or several (3-9) families susceptible (4/9), or few (<3) families
susceptible (4/9).
Susceptible host species
Insusceptible host species
Families containing susceptible hosts
Families containing
insusceptible hosts
Physical and
biochemical properties
Properties of particles in sap
TIP:
50-55-60 °C. LIV: 7-13.33-26 days. DEP: log10 minus 2-4 (1/1). Leaf sap
contains few virions (4/7), or contains many virions (3/7).
Particle morphology
Virions geminate; not enveloped
(6/6); 15-18.1-20 nm in diameter; 25-30-35 nm in length; angular in profile
(5/5); with a conspicuous capsomere arrangement (1/5), or without a conspicuous
capsomere arrangement (4/5).
Physical properties
One sedimenting component in purified
preparations (5/6), or two sedimenting components in purified preparations
(2/6); sedimentation coefficient 70-74.6-76 S; of the other(s) 50-52-54
S. Density 1.35 g cm-3 in CsCl. A260/A280 ratio
1.1-1.283-1.4.
Biochemical properties
Virions contain 19-19.66-20 %
nucleic acid; 80 % protein; 0 % lipid.
Genome consists of DNA; single-stranded; circular (9/9). Total genome
size 2.672-2.752-2.9 kb. Genome unipartite (7/7); largest (or only) genome part
2.672-2.752-2.9 kb. Base composition 25.7-26.4-27.7 % G; 21.8-24.23-25.5 % A;
23.1-23.53-23.9 % C; 24.8-26.06-28.1 % T. Infectivity lost when deproteinised
with proteases (1/1); retained when deproteinised with phenol or detergent
(1/1). Poly A region absent (1/1). Additional factor required for infectivity
(1/1). Genome has no tRNA-like activity (1/1).
Features of the genome
Non-genomic nucleic acid
not found in the virions (3/3). Sub-genomic mRNA found in infected
cells (1/2), or not found in infected cells (1/2).
Features of proteins
Virion protein(s) one (8/8);
Mr 26600-28120-32000.
Virus-coded non-virion proteins identified by genomic sequence
analysis (1/1); one protein found (1/1). Mr 10900.
Replication
Genome replicates in nuclei (4/4).
Replication does not depend on a helper virus (4/4).
Cytopathology
Virions found in cytoplasm (3/8), or in
nuclei (8/8), or in cell vacuoles (3/8). Inclusions present in infected cells
(4/6), or absent from infected cells (2/6); are crystals in the nucleus (3/4),
or viroplasms (1/4), or unusual in shape (2/4); they contain virions (3/3).
Taxonomy and
relationships
Viral family : Geminiviridae.
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
