Plant Viruses
Online 
Descriptions and Lists from
the VIDE Database
Carlaviruses
Index
Nomenclature
ICTV reference
Definitive species
Tentative species
Host range and
symptoms
Natural host range and symptoms
Symptoms
persist (18/31), or vary cyclically over a few weeks (1/31), or vary seasonally
(2/31), or disappear soon after infection (1/31), or none (10/31).
Transmission
Transmitted by a vector (29/30), or means
not involving a vector (1/30); an insect (29/29); Aleyrodidae (2/29), or
Aphididae (27/29). Transmitted in a non-persistent manner (24/26), or in a
semi-persistent manner (2/26). Virus lost by the vector when it moults (1/1);
does not multiply in the vector (1/1); not transmitted congenitally to the
progeny of the vector (1/1); transmitted by mechanical inoculation (41/45), or
not transmitted by mechanical inoculation (4/45); transmitted by grafting
(16/16); not transmitted by contact between plants (12/12); transmitted by seed
(2/20), or not transmitted by seed (18/20); transmitted by pollen to the
pollinated plant (1/7), or not transmitted by pollen (6/7).
Experimental host range
Many (>9) families susceptible
(1/40), or several (3-9) families susceptible (18/40), or few (<3) families
susceptible (21/40).
Susceptible host species
Insusceptible host species
Families containing susceptible hosts
Families containing
insusceptible hosts
Physical and
biochemical properties
Properties of particles in sap
TIP:
50-68.5-85 °C. LIV: 0.5-4.852-21 days. DEP: log10 minus 2 (4/21), or 3
(12/21), or 4 (11/21), or 5 (5/21), or 6 (3/21), or 7 (1/21). Infectivity of sap
not changed by treatment with di-ethyl ether (2/2). Leaf sap contains few
virions (20/33), or contains many virions (13/33).
Particle morphology
Virions filamentous (49/49); not
enveloped (40/40); usually straight (28/44), or usually flexuous (17/44); with a
clear modal length (44/44); of 509-655.7-720 nm; 11-13.14-18 nm wide. Axial
canal obvious (8/34), or obscure (26/34); 2-2.666-3.5 nm in diameter. Basic
helix obvious (3/29), or obscure (27/29); pitch of basic helix 3.3-3.4-3.5 nm.
Physical properties
One sedimenting component in purified
preparations (24/24); sedimentation coefficient 147.5-163.2-176 S.
Density 1.28-1.306-1.32 g cm-3 in CsCl. Density 1.29 g cm-3 in
sucrose. Isoelectric point pH 4.5. A260/A280 ratio 1.08-1.239-1.4.
Biochemical properties
Virions contain 2.5-5.703-8.5 %
nucleic acid; 93.75-94.52-95 % protein; 0 % lipid.
Genome consists of RNA (20/20); single-stranded (20/20); linear (11/11).
Total genome size 6.48-7.772-8.5 kb. Genome unipartite (19/19); largest (or
only) genome part 6.48-7.759-8.535 kb. Base composition 31 % G; 24 % A; 23 % C;
22 % U. Infectivity retained when deproteinised with proteases (1/1); retained
when deproteinised with phenol or detergent (4/4), or lost when deproteinised
with phenol or detergent (1/4). Additional factor not required for infectivity
(2/2).
Features of the genome
Non-genomic nucleic acid
not found in the virions (5/5). Sub-genomic mRNA not found in infected
cells (1/1). 1 virus specified dsRNA species found in infected cells.
Features of proteins
Virion protein(s) one (19/20),
or two (1/20); Mr 23200-32530-40000. Mr of 2nd largest
24000.
Replication
Replication does not depend on a helper virus
(13/13).
Cytopathology
Virions found in cytoplasm (23/23), or in
chloroplasts (1/23), or in mitochondria (1/23). Inclusions present in infected
cells (12/20), or absent from infected cells (8/20); are crystals in the
cytoplasm (1/12), or amorphous X-bodies (2/12), or membranous bodies (3/12),
or viroplasms (3/12), or unusual in shape (6/12); they contain virions (7/8), or
they do not contain virions (1/8).
Taxonomy and relationships
No data available.
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
