Plant Viruses
Online 
Descriptions and Lists from
the VIDE Database
Kalanchoe latent
carlavirus
Index
Data collated by S.L. Bhattiprolu, 1992.
Nomenclature
Synonyms
Acronym
Strains
ICTV decimal code
Host range and symptoms
First reported
in Kalanchoe blossfeldiana; from the U.S.A.; by Hearon (1981).
Natural host range and symptoms
- Kalanchoe
blossfeldiana - symptomless infection.
Transmission
Virus transmitted by mechanical inoculation;
transmitted by grafting.
Ecology and control
Studies reported
by Paludan (1985). Kalanchoe latent virus 1 was eliminated from the mother
plants by meristem tip culture combined with previous heat treatment.
Experimental host range
Few (<3) families susceptible.
Diagnostically susceptible host species and symptoms
- Chenopodium amaranticolor, C. album, C. quinoa - local
lesions, systemic yellow vein-banding and leaf distortion with strain KV2).
- Chenopodium album, C. murale, Tetragonia tetragonioides - local
lesions; no systemic infection.
Diagnostically insusceptible host
species
Datura stramonium, Gomphrena globosa, Petunia ×
hybrida, Nicotiana clevelandii, Phaseolus vulgaris.
Maintenance
and propagation hosts
Assay
hosts (Local lesions or Whole plants)
Chenopodium quinoa (L and W), Tetragonia tetragonioides
(L).
Susceptible host species
Insusceptible host species
Families containing susceptible hosts
Families containing
insusceptible hosts
Comments on host-range
Only the
strain KV-2 induces systemic infection in Chenopodium amaranticolor
and C. quinoa.
Sources of host-range data
Physical and
biochemical properties
Properties of particles in sap
TIP:
75-80 °C. LIV: 3-5 days. Leaf sap contains many virions.
Purification method
Particle morphology
Virions filamentous; not enveloped;
usually flexuous; with a clear modal length; of 620-650 nm. Axial canal obscure.
Basic helix obscure.
Physical properties
One sedimenting component in purified
preparations; sedimentation coefficient 170 S. Density 1.3 g cm-3
in CsCl. A260/A280 ratio 1.32-1.38.
Biochemical properties
Virions contain 5 % nucleic acid;
95 % protein.
Genome consists of RNA; single-stranded. Infectivity retained when
deproteinised with phenol or detergent (KV-1), or lost when deproteinised
with phenol or detergent (KV-2).
Features of proteins
Virion protein(s) one;
Mr 33000-34000; it is coat protein. Method of preparation: Hearon
(1982).
Replication
Replication does not depend on a helper
virus.
Cytopathology
Virions found in leaves, mesophyll and the
vascular parenchyma; in cytoplasm. Inclusions present in infected cells; are
viroplasms; they contain virions. Other cellular changes: fusiform inclusions
consisting of aggregates of parallel virions and pockets of cytoplasmic
materials, vesicles, or microbodies; virions also aggregate along organelle
membranes and the tonoplast. Bands of virions and `fingerprint like' inclusions
also in cells within the local lesions (Hearon, 1982, 1984).
Taxonomy and
relationships
Virus(es) with serologically related virions
Carnation latent, potato S, lily symptomless and chrysanthemum B
carlaviruses.
Virus(es) with serologically unrelated virions
Elderberry, potato M and red clover vein mosaic
carlaviruses.
Comments and
References
References
- Hearon, S.S. (1981).
Phytopathology 71: 767.
- Hearon, S.S. (1982).
Phytopathology 72: 838.
- Hearon, S.S. (1984).
Phytopathology 74: 670.
- Paludan, N. (1985). Tidsskr.
PlAvl. 89: 191.
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