Plant Viruses
Online 
Descriptions and Lists from
the VIDE Database
Pepper Texas
bigeminivirus
Index
Data collated by D.C. Stenger, 1991.
Nomenclature
Synonyms
Acronym
Strains
distortion strain, yellow mosaic strain.
ICTV decimal code
Host range and symptoms
First reported
in Capsicum annuum; from Texas, U.S.A.; by Stenger et al. (1990).
Natural host range and symptoms
Symptoms persist.
Symptoms leaf curl, malformation and stunting or mosaic.
- Capsicum annuum - leaf curling, malformation, vein clearing
and stunting (distortion strain); mosaic, vein clearing and stunting (mosaic
strain).
Transmission
Transmitted by a vector; an insect;
Bemisia tabaci; Aleyrodidae. Transmitted in a persistent manner. Virus
transmitted by mechanical inoculation; transmitted by grafting; not transmitted
by contact between plants; not transmitted by seed; not transmitted by pollen.
Geographical distribution
Spreads in Mexico and the USA.
Experimental host range
Few (<3) families susceptible.
Experimentally infected plants mostly show leaf curl, malformation, stunting,
vein malformation, mosaic.
Diagnostically susceptible host
species and symptoms
- Capsicum annuum - leaf curl,
malformation, stunting, vein malformation.
- Datura stramonium,
Lycopersicon esculentum - mosaic, vein clearing, stunting.
- Nicotiana benthamiana - mosaic, vein clearing, leaf curl,
stunting.
Diagnostically insusceptible host species
Chenopodium quinoa, Cucumis melo, Malva parviflora, Phaseolus vulgaris.
Maintenance and propagation hosts
Assay hosts (Local lesions or
Whole plants)
Nicotiana benthamiana (W),
Capsicum annuum (W).
Susceptible host species
Insusceptible host
species
Families containing susceptible hosts
Families containing
insusceptible hosts
Comments on host-range
Restricted
to Solanaceae.
Sources of host-range data
Physical and
biochemical properties
Properties of particles in sap
Leaf sap
contains few virions. Electron microscopy: stain with UA.
Purification method
Stein et
al. (1983); Stenger et al. (1990).
Particle morphology
Virions geminate (isometric virions
also present); not enveloped; 18 nm in diameter; dimers 40 nm in length; without
a conspicuous capsomere arrangement.
Physical properties
Two sedimenting components in
purified preparations; sedimentation coefficient of the fastest 88 S; of
the other(s) 50 S.
Biochemical properties
Genome consists of DNA;
single-stranded; circular. Total genome size 5.2 kb. Genome of two parts;
largest (or only) genome part the larger 2.6 kb; the 2nd largest 2.6 kb. Genomic
nucleic acid isolated by : extracting in phenol/ chloroform, precipitate with
ethanol. Additional factor not required for infectivity.
Features of the genome
Non-genomic nucleic acid
not found in the virions.
Replication
Genome replicates in nuclei. Replication does
not depend on a helper virus.
Cytopathology
Virions found in leaves and roots; in
nuclei.
Taxonomy and
relationships
Additional comments on relationships
Texas pepper geminivirus DNA A has homology with tomato golden mosaic
virus DNA A.
Best tests for diagnosis
DNA A cross hybridizes with the A DNAs of other bipartite geminiviruses. DNA B
does not hybridize with other geminivirus DNAs.
Comments and
References
References
- Stenger, D.C., Duffus,
J.E. and Villalon, B. (1990). Phytopathology 80: 704.
- Stein,
V.E., Coutts, R.H.A. and Buck, K.W. (1983). J. gen. Virol. 64:
2493.
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