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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.

00.067.0.01.003. Cocksfoot mottle virus

Cite this publication as: ICTVdB Management (2006). 00.067.0.01.003. Cocksfoot mottle 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: the United Kingdom.

Host of Isolate and Habitat Details
Source of isolate: Dactylis glomerata.

Natural host and symptoms
Dactylis glomerata, Triticum aestivum — conspicuous yellow streaking and mottling of leaves.

Reference to Isolation Report
Serjeant (1963).

Classification

This is a description of a plant virus at the species level with data on all virus properties from morphology to genome, replication, antigenicity and biological properties.

ICTVdB Virus Code: 00.067.0.01.003. Virus accession number: 67001003. Obsolete virus code: 67.0.1.0.003; superceded accession number: 67010003.
NCBI Taxon Identifier NCBI Taxonomy ID: 40979.

Name, Synonyms and Lineage

Synonym(s): cocksfoot necrotic mosaic virus. ICTV approved acronym: CoMV. Virus is an ICTV approved species of the genus 00.067.0.01. Sobemovirus; not assigned to a family.

Virion Properties

Morphology

Virions consist of a capsid. Virus capsid is not enveloped, round with icosahedral symmetry (T=3). The capsid is isometric and has a diameter of 29.4-32.4 nm. Capsids appear hexagonal in outline.


Depth cued along z direction.
 Rendered Surface
T= 3 Lattice
  N-terminus (blue) to C-terminus (red).  
Protein Subunits
 Capsomeres

Capsid structures, detailed structural and computational analysis are found in the Protein Data Bank (PDB) using VIPERdB, the VIrus Particle ExploreR 1ng0.

Physicochemical and Physical Properties

Virions have a buoyant density in CsCl of 1.39 g cm-3. The sedimentation coefficient is 118 S20w. A260/A280 ratio is 1.6. The thermal inactivation point (TIP) is at 65°C. The longevity in vitro (LIV) is 4-6 days (at 20°C). Although the titer is dependent on the host, the decimal exponent (DEX) of the dilution end point is usually around 3.

Nucleic Acid

The Mr of the genome constitutes 25% of the virion by weight. The genome is monopartite. Only one particle size of linear, positive-sense, single-stranded RNA is recovered. The complete genome is 4350 nucleotides long, is partially sequenced, or sequenced, but only an estimate is available, complete sequence is 4350 nucleotides long. Sequence has the accession number

[Z36903] Gb(89)n:Cmvrep Cocksfoot mottle virus gene for putative replicase. 6/95 2,838bp.
[Z48630] Em(44)n:Cfmvseq Gb(90)_vi:Cfmvseq Cocksfoot Mottle Virus genes for polyprotein, RNA dependent RNA polymerase and coat protein.

GenBank records for nucleotide sequences; complete genome sequences.

Proteins

Proteins constitute about 75% of the particle weight.

The viral genome encodes structural proteins and non-structural proteins. Virions consist of 1 structural protein(s) located in the capsid.

Structural Proteins: Capsid protein has a molecular mass of 27610 Da (254 AA) with 180 copies per virion; sequence has the accession number [Q66012]; is the coat protein.

Images of Structural Proteins






















virus capsid protein structure.

Lipids

Lipids are not reported.

Antigenicity

The virus is serologically related to cynosurus mottle virus (New Zealand isolate). The virus does not show serological relationships to cynosurus mottle virus (European isolate).

The genome of a New Zealand isolate is reported to have 5-8% nucleotide sequence homology with that of cynosurus mottle virus.

Biological Properties

Natural Host

Domain
Viral hosts belong to the Domain Eucarya.

Domain Eucarya
Kingdom Plantae.

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

General Symptoms in Plants Symptoms streaking and mottling of leaves.

Severity and Occurrence of Disease

Host: Signs and symptoms persist.

Transmission and Vector Relationships

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

Vector Transmission:
Virus is transmitted by arthropods, by insects of the order Coleoptera; Chrysomelid beetles, Lema melanopa, L. lichenis. Virus is transmitted in a semi-persistent manner.

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 Gramineae. The following species were susceptible to experimental virus infection: Avena sativa, Dactylis glomerata, Hordeum vulgare, Triticum aestivum.

Host:
Experimentally infected hosts mainly show symptoms of yellow streaking and mottling with necrosis.

Experimentally infected insusceptible Hosts: Families containing insusceptible hosts: Chenopodiaceae, Cucurbitaceae, Gramineae, Leguminosae-Papilionoideae, Liliaceae, Musaceae, Solanaceae. Species inoculated with virus that do not show signs of susceptibility: Anthoxanthum odoratum, Bromus mollis, Chenopodium amaranticolor, Chenopodium hybridum, Chenopodium quinoa, Cucumis sativus, Elytrigia repens, Lilium formosanum, Lolium perenne, Musa balbisiana, Nicotiana clevelandii, Nicotiana glutinosa, Nicotiana tabacum, Oryza sativa, Petunia x hybrida, Phaseolus vulgaris, Poa pratensis, Poa trivialis, Sorghum halepense, Vicia faba, Zea mays.

Diagnostic Hosts

Diagnostic host species and symptoms:

Avena sativa, Dactylis glomerata, Hordeum vulgare, Triticum aestivum — systemic leaf streaking, mottling and necrosis. Diagnostic host: insusceptible host species Musa balbisiana, Oryza sativa, Poa pratensis, Sorghum halepense, Zea mays.

Maintenance and Propagation Hosts

Most commonly used maintenance and propagation host species are Dactylis glomerata.

Histopathology: Virus can be best detected in all parts of the host plant.

Geographical Distribution

The virus occurs in France, Germany, Japan, New Zealand (Aotearoa), and the United Kingdom.

Comments

Although the virus alone will not infect Cynosurus cristatus, it induces systemic infection when present together with cynosurus mottle virus.

References

Catherall, P.L. (1970). CMI/AAB Descr. Pl. Viruses No. 23, 3 pp.

Hariri, D. and Lapierre, H. (1978). C.N.R.A., I.N.R.A., Versailles, France, p. 281.

Hull, R. (1977a).J. gen. Virol. 36: 289.

Hull, R. (1977b). Virology 79: 50.

Hull, R. (1977c). Virology 79: 58.

Huth, W. (1968). Phytopath. Z. 62: 300.

Mohamed, N.A. (1980). J. agric. Res. 23: 273.

Mohamed, N.A. and Mossop, D.W. (1981). J. gen. Virol. 55: 63.

Rabenstein, F. and Schmidt, H.B. (1979). Arch. Phytopath. Pflanzenschutz 15: 351.

Serjeant, E.P. (1963). Rep. Rothamsted Exp. Stn. 1962, p. 112.

Serjeant, E.P. (1964). Pl. Path. 13: 23.

Serjeant, E.P. (1967). Ann. appl. Biol. 59: 31.

Taliansky, M.E., Malyshenko, S.I., Pshannikova, E.S. and Atabekov, JG (1982). Virology 122: 327.

Toriyama, S. (1982). Ann. Phytopath. Soc. Japan 48: 514.

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 234 by P. Jeyanandarajah, 1991.

A description of the virus is found in DPV, a database for plant viruses developed by the Association of Applied Biologists (AAB), with the number 23.

Images

Taxon images: • EM from IACR Rothamsted.



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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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