Plant Viruses
Online
Descriptions and Lists from
the VIDE Database
Closteroviruses
Index
Nomenclature
ICTV reference
Definitive species
Tentative species
Host range and
symptoms
Natural host range and symptoms
Symptoms
persist (13/13), or vary seasonally (1/13), or disappear soon after infection
(1/13).
Transmission
Transmitted by a vector (20/20); an insect
(20/20); Aleyrodidae (6/19), or Aphididae (10/19), or Psyllidae (1/19), or
Pseudococcidae (2/19). Transmitted in a non-persistent manner (2/14), or in a
semi-persistent manner (12/14). Virus lost by the vector when it moults
(4/4); does not multiply in the vector (4/4); not transmitted congenitally to
the progeny of the vector (4/4); can help the vector transmission of another
virus (1/1); transmitted by mechanical inoculation (9/19), or not transmitted by
mechanical inoculation (10/19); transmitted by grafting (8/8); not transmitted
by contact between plants (8/8); not transmitted by seed (7/7); not transmitted
by pollen (2/2).
Experimental host range
Many (>9) families susceptible
(2/18), or several (3-9) families susceptible (3/18), or few (<3) families
susceptible (13/18).
Susceptible host species
Insusceptible host species
Families containing susceptible hosts
Families containing
insusceptible hosts
Physical and
biochemical properties
Properties of particles in sap
TIP:
40-49.16-55 °C. LIV: 1-2-5 days. DEP: log10 minus 3 (1/5), or 4 (4/5), or 5
(2/5). Leaf sap contains few virions (12/13), or contains many virions (1/13).
Particle morphology
Virions filamentous (24/24); not
enveloped (13/13); usually flexuous (23/23); with a clear modal length (13/17),
or with no clear modal length (4/17); of 150-1504-2200 nm; 10-12.11-18 nm wide.
Axial canal obvious (1/8), or obscure (7/8). Basic helix obvious (8/10), or
obscure (2/10); pitch of basic helix 3-3.528-3.7 nm.
Physical properties
One sedimenting component in purified
preparations (4/5), or two sedimenting components in purified preparations
(1/5); sedimentation coefficient 110-125-140 S; of the other(s) 80-85-90
S. Density 1.325-1.332-1.34 g cm-3 in CsCl. A260/A280 ratio
1.44-1.61-1.73.
Biochemical properties
Virions contain 5-5.075-5.15 %
nucleic acid; 94.85 % protein; 0 % lipid.
Genome consists of RNA (7/7); single-stranded (7/7); linear (3/3). Total
genome size 7.1-13.96-20 kb. Genome unipartite (5/5); largest (or only) genome
part 7.1-13.22-20 kb. Base composition 23.4-25.9-28.4 % G; 24.4-25.35-26.3 % A;
21-22.95-24.9 % C; 22.3-25.8-29.3 % U. 5´ terminus of RNA has a methylated
nucleotide cap (1/1). Infectivity retained when deproteinised with phenol or
detergent (1/1). Poly A region absent (2/2). Additional factor not required for
infectivity (2/2). Genome has no tRNA-like activity (1/1).
Features of the genome
Non-genomic nucleic acid
not found in the virions (1/1). Sub-genomic mRNA found in infected
cells (1/1). 1-3.5-6 virus specified dsRNA species found in infected cells. Size
of largest virus specified dsRNA 4.6-10.9-15 kbp; 2nd largest 1.2-4.712-7 kbp;
3rd largest 0.4-3.037-5 kbp; 4th largest 2.7 kbp; 5th largest 1.6 kbp; 6th
largest 1 kbp.
Features of proteins
Virion protein(s) one (4/4);
Mr 22.3-20130-34000.
Replication
Replication does not depend on a helper virus
(5/5). Acts as helper for another virus (1/1).
Cytopathology
Virions found in cytoplasm (9/9), or in
nuclei (1/9). Inclusions present in infected cells (8/8); are crystals in the
cytoplasm (2/8), or membranous bodies (3/8), or viroplasms (1/8), or unusual in
shape (2/8); they contain virions (7/7).
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: 16th January 1997.' 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:
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