Plant Viruses
Online 
Descriptions and Lists from
the VIDE Database
Hop latent
carlavirus
Index
Data collated by A.N. Adams, 1986.
Nomenclature
Acronym
ICTV decimal code
Host range and symptoms
First reported
in Humulus japonicus, Humulus lupulus; from Aschersleben, Germany; by
Schmidt et al. (1966).
Natural host range and symptoms
Symptoms persist.
- Humulus lupulus - systemic chlorotic flecking, but usually
symptomless.
Transmission
Transmitted by a vector; an insect; Myzus
(Phorodon) humuli; Aphididae. Transmitted in a non-persistent manner.
Virus transmitted by mechanical inoculation; transmitted by grafting; not
transmitted by seed.
Geographical distribution
Spreads in the
Eurasian region; Australia, China, and the USA. Found, but with no evidence of
spread, in New Zealand. Probably occurs worldwide as it is latent and planting
material of hops has been distributed to all parts of the world.
Experimental host range
Few (<3) families susceptible.
Diagnostically susceptible host species and symptoms
no reliable diagnostic host is known, as most susceptible plants show
no symptoms.
Diagnostically insusceptible host species
Nicotiana clevelandii, which is however susceptible to hop mosaic
carlavirus but shows no symptoms.
Maintenance and propagation hosts
Assay hosts (Local lesions or Whole plants)
Phaseolus vulgaris cv. Kinghorn wax (L) - local lesions, but
unreliable.
Susceptible host species
Insusceptible host species
Families containing susceptible hosts
Families
containing insusceptible hosts
Sources of host-range data
Probasco
and Skotland (1978); Adams and Barbara (1982).
Physical and
biochemical properties
Properties of particles in sap
DEP:
log10 minus 2-3. Infectivity of sap not changed by treatment with di-ethyl
ether. Leaf sap contains few virions (usually).
Purification method
Probasco and
Skotland (1978); Adams and Barbara (1982).
Particle morphology
Virions filamentous; not enveloped;
usually straight (or slightly flexuous); with a clear modal length; of 674 nm;
14.4 nm wide. Axial canal obscure.
Physical properties
One sedimenting component in purified
preparations; sedimentation coefficient 176 S.
Biochemical properties
Virions contain 6 % nucleic acid;
94 % protein; 0 % lipid.
Genome consists of RNA; single-stranded; linear. Total genome size 8.2
kb. Genome unipartite; largest (or only) genome part 8.2 kb. Genomic nucleic
acid isolated by Adams and Barbara (1982).
Features of proteins
Virion protein(s) one;
Mr 33000. Method of preparation: Adams and Barbara (1980).
Replication
Replication does not depend on a helper
virus.
Taxonomy and
relationships
Virus(es) with serologically related virions
Carnation latent, hop mosaic, lily symptomless, nerine latent and
helenium S viruses are moderately related; American hop latent and potato M
viruses are more distantly related.
Virus(es) with serologically
unrelated virions
Potato S and poplar mosaic
viruses.
Comments and
References
References
- Adams, A.N. and Barbara,
D.J. (1980). Ann. appl. Biol. 96: 201.
- Adams, A.N. and
Barbara, D.J. (1982). Ann. appl. Biol. 101: 483.
- Barbara, D.J.
and Adams, A.N. (1983). CMI/AAB Descr. Pl. Viruses No. 261, 4 pp.
- Probasco, E.G. and Skotland, C.B. (1978). Phytopathology 68:
277.
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