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Descriptions are generated automatically from the ICTVdB database including links. Some descriptions are only very basic and links may point to documents that are not yet published on the Web.

00.015.0.03.001. Cassava vein mosaic virus

Cite this publication as: ICTVdB Management (2006). 00.015.0.03.001. Cassava vein mosaic virus. In: ICTVdB - The Universal Virus Database, version 4. Büchen-Osmond, C. (Ed), Columbia University, New York, USA

Cite this site as: ICTVdB - The Universal Virus Database, version 4. http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/

Table of Contents

Isolate Description

Location: Sao Paulo; Brazil.

Host of Isolate and Habitat Details
Source of isolate: Manihot esculenta.

Natural host and symptoms
Manihot esculenta — vein mosaic.

Reference to Isolation Report
Costa and Normanha (1940).

Classification

This is a description of a plant virus at the species level.

ICTVdB Virus Code: 00.015.0.03.001. Virus accession number: 15003001. Obsolete virus code: 15.0.1.T.002; superceded accession number: 1501t002.
NCBI Taxon Identifier NCBI Taxonomy ID: 38062.

Name, Synonyms and Lineage

ICTV approved acronym: CsVMV. Virus is the type of the genus 00.015.0.03. Cavemovirus in the family 00.015. Caulimoviridae.

Virion Properties

Morphology

Virions consist of a capsid. Virus capsid is not enveloped. Capsid is round to elongated with icosahedral symmetry. The capsid is isometric and has a diameter of 45-50 nm. The capsid shells of virions are composed of multiple layers. Capsids appear round. The capsomer arrangement is not obvious.

Electron microscopic preparation and references: Virus preparation contains few virions. Reference for electron microscopic methods: Lin and Kitajima (1980).

Physicochemical and Physical Properties

There are 1 sedimenting component(s) found in purified preparations. The sedimentation coefficient is 246 S20w. The infectivity is not changed by treatment with ether.

Nucleic Acid

The genome is not segmented and contains a single molecule of circular. The genome is -RT. The genome is double-stranded DNA. The complete genome is 8159 nucleotides long. Sequence can be accessed from EBI-EMBL, or GenBank, or Rothamsted is fully sequenced, complete sequence is 8159 nucleotides long. Sequence has the accession number [U95208]. The genome has a guanine + cytosine content of 24.93 %. Reference to nucleotide sequence R.J. Shepherd (personal communication).

GenBank records for nucleotide sequences; complete genome sequences.

Proteins

The viral genome encodes structural proteins and non-structural proteins.

Non-Structural Proteins: The virus codes for an RNA-dependent DNA polymerase.

Lipids

Lipids are not reported.

Transcription: The virus codes for 5 ORF(s).

Translation: Replication involves a reverse transcription step.

Antigenicity

The virus is serologically related to none.

Biological Properties

Natural Host

Domain
Viral hosts belong to the Domain Eucarya.

Domain Eucarya
Kingdom Plantae.

Kingdom Plantae
Phylum Magnoliophyta (Angiosperms, Class Magnoliopsida (Dicotyledonae).

Severity and Occurrence of Disease

Host: Signs and symptoms persist.

Transmission and Vector Relationships

Virus is not transmitted by a vector. Virus is transmitted by mechanical inoculation; transmitted by grafting; not transmitted by seeds; not transmitted by pollen.

Experimental Hosts and Symptoms

Under experimental conditions susceptibility to infection by virus is found in few families. Susceptible host species are found in the Family Euphorbiaceae. The following species were susceptible to experimental virus infection: Manihot esculenta.

Host:
Experimentally infected hosts mainly show symptoms of vein mosaic.

Diagnostic Hosts

Diagnostic host species and symptoms:

Manihot esculenta — vein mosaic.

Maintenance and Propagation Hosts

Most commonly used maintenance and propagation host species are Manihot esculenta.

Assay Hosts

Host: Assay hosts (for Local lesions or Whole plants):
Manihot esculenta (W).

Histopathology: Virus can be best detected in all parts of the host plant. Virions are found in the cytoplasm.

Cytopathology: Inclusions are present in infected cells. Inclusion bodies in the host cell are found in the cytoplasm. Cytoplasmic inclusions are viroplasma (but not as dense as those of other caulimoviruses). Inclusions contain mature virions.

Geographical Distribution

The virus occurs in Brazil.

References

Costa, AS. and Normanha, E.S. (1940). J. Agron. 3: 239.

Kitajima, E.W. and Costa, AS. (1966). Bragantia 25: 211.

Lin, M.T. and Kitajima, E.W. (1980). Fitopatol. Bras. 5: 419.
The following generic references are cited in the most recent ICTV Report.

PubMed References.

VIDEdB, the plant virus database developed at the Australian National University by Adrian J. Gibbs and collaborators, contains an earlier description with the number 176 by E.W. Kitajima, 1985.

Taxonomic Proposals and Changes

A taxonomic proposal has been submitted to the ICTV by the Plant Virus Subcommittee, Study Group for Caulimoviridae at the meeting in Strasburg, April 1997. The proposal has been approved at the meeting of the Executive Committee in Strasburg, 1997, the taxon has been removed from the Species (Caulimovirus).



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DELTA - DEscription Language for TAxonomy developed by Dr Mike Dallwitz, Toni Paine and Eric Zurcher, CSIRO Entomology, Canberra, Australia. ICTVdB - The Universal Virus Database, developed for the International Committee on Taxonomy of Viruses by Dr Cornelia Büchen-Osmond is written in DELTA. The virus descriptions in ICTVdB are coded by, or using data from experts in the field of virology or members ICTV. The character list is the underlying code. All virus descriptions are based on the character list and natural language translations are automatically generated and formatted for display on the Web from the descriptions in DELTA-format. The description has been generated automatically from DELTA files. DELTA - DEscription Language for TAxonomy developed by Dr Mike Dallwitz, Toni Paine and Eric Zurcher, CSIRO Entomology, Canberra, Australia.

ICTVdB - The Universal Virus Database, developed for the International Committee on Taxonomy of Viruses (ICTV) by Dr Cornelia Büchen-Osmond, is written in DELTA. The virus descriptions in ICTVdB are coded by ICTV members and experts, or by the ICTVdB Management using data provided by the experts, the literature or the latest ICTV Report. The character list is the underlying code. All virus descriptions are based on the character list and natural language translations from the encoded descriptions are automatically generated and formatted for display on the Web.

Developer of the DELTA software: M. J. Dallwitz, T. Paine and E. Zurcher

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Last updated on 25 April 2006 by Cornelia Büchen-Osmond
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