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00.067.0.81.013. Cynosurus mottle virus

Cite this publication as: ICTVdB Management (2006). 00.067.0.81.013. Cynosurus 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 U.K.; the United Kingdom.

Host of Isolate and Habitat Details
Source of isolate: Cynosurus cristatus, Lolium perenne.

Natural host and symptoms
Agrostis tenuis, Cynosurus cristatus — severe leaf mottling and necrosis.

Agrostis stolonifera — dark green leaf mottling.

Lolium perenne, Lolium multiflorum x L. perenne — chlorotic leaf mottling.

Reference to Isolation Report
A'Brook (1972).

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: 00.067.0.81.013. Virus accession number: 67081013. Obsolete virus code: 67.0.1.T.013; superceded accession number: 6701t013.

Name, Synonyms and Lineage

Synonym(s): lolium mottle virus (A'Brook, 1972). ICTV approved acronym: CnMoV. Virus is a tentative member 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. The isometric capsid has a diameter of 28 nm. Capsids appear hexagonal in outline.

Electron microscopic preparation and references: Reference for electron microscopic methods: Mohamed (1978b).

Physicochemical and Physical Properties

Virions have a buoyant density in CsCl of 1.399 g cm-3. The density of virions is 1.332 g cm-3 in Cs2SO4. There are 1 sedimenting component(s) found in purified preparations. The sedimentation coefficient is 113 S20w. A260/A280 ratio is 1.72. The thermal inactivation point (TIP) is at 75°C. Although the titer is dependent on the host, the decimal exponent (DEX) of the dilution end point is usually around 8.

Nucleic Acid

The Mr of the genome constitutes 22.5% of the virion by weight. The genome is monopartite. Only one particle size of linear, positive-sense, single-stranded RNA is recovered, is sequenced, complete sequence is about 4300 nucleotides long. The genome has a base ratio of 24.2 % guanine; 24.3 % adenine; 26.2 % cytosine; 25.3 % uracil. Reference to nucleotide sequence Mohamed (1978b).

Proteins

Proteins constitute about 77.5% of the particle weight.

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

Lipids

Lipids are not reported.

Antigenicity

The virus is serologically related to cocksfoot mottle virus.

The viral RNA has 5-8% nucleotide sequence homology with that of cocksfoot mottle virus.

Biological Properties

Natural Host

Domain
Viral hosts belong to the Domain Eucarya.

Domain Eucarya
Kingdom Plantae.

Kingdom Plantae
Phylum Magnoliophyta (Angiosperms, Class Liliopsida (Monocotyledonae).

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.

Vector Transmission:
Virus is transmitted by arthropods, by insects of the order Hemiptera, family Aphididae; Rhopalosiphum padi (New Zealand isolate). Virus is transmitted in a non-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: Agrostis puchella, Agrostis stolonifera, Agrostis tenuis, Avena fatua, Avena sativa, Bromus secalinus, Cynosurus cristatus, Hordeum vulgare, Lagurus ovatus, Lolium multiflorum x L. perenne, Lolium perenne, Phleum arenarium, Poa annua, Secale cereale, Triticum aestivum.

Experimentally infected insusceptible Hosts: Families containing insusceptible hosts: Gramineae. Species inoculated with virus that do not show signs of susceptibility: Bromus mollis, Dactylis glomerata, Echinochloa colona, Echinochloa crus-galli, Elytrigia repens, Festuca pratensis, Lamarckia aurea, Lolium multiflorum, Lolium perenne, Oryza sativa, Panicum miliaceum, Poa annua, Setaria italica, Setaria viridis, Zea mays.

Diagnostic Hosts

Diagnostic host species and symptoms:

Agrostis puchella, Bromus secalinus, Cynosurus cristatus, Lagurus ovatus, Phleum arenarium, Triticum aestivum — severe systemic leaf mottling and, often, necrosis.

Avena fatua, A sativa, Hordeum vulgare, Secale cereale — mild systemic leaf mottling.

Diagnostic host: insusceptible host species Elytrigia repens, Bromus mollis, Dactylis glomerata, Lolium multiflorum, Setaria italica.

Maintenance and Propagation Hosts

Most commonly used maintenance and propagation host species are Avena sativa, Triticum aestivum.

Assay Hosts

Host: Assay hosts (for Local lesions or Whole plants):
Avena sativa (W), Cynosurus cristatus (W), Triticum aestivum (W).

References to host data: Catherall et al. (1977, Mohamed (1978a).

Histopathology: Virus can be best detected in leaves and mesophyll. Virions are found in the cytoplasm and cell vacuole.

Cytopathology: Inclusions are not present in infected cells.

Geographical Distribution

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

References

A'Brook, J. (1972). Pl. Path. 32: 118.

Catherall, P.L., Andrews, P.A. and Chamberlain, J.A. (1977). Ann. appl. Biol. 87: 233.

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

Hull, R. (1988). In: The Plant Viruses, Vol. 3, Polyhedral Virions with Monopartite RNA Genomes, p. 113; ed. R. Koenig. Plenum Press, New York.

Huth, W. and Paul, H.L. (1977). Annls. Phytopath. 9: 293.

Mohamed, N.A. (1978a). N.Z. Jl agric. Res. 21: 709.

Mohamed, N.A. (1978b). J. gen. Virol. 40: 379.

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

Paul, H.L., Querfurth, G. and Huth, W. (1980). J. gen. Virol. 47: 67.

The following generic references are cited in the most recent ICTV Report.
VIDEdB, the plant virus database developed at the Australian National University by Adrian J. Gibbs and collaborators, contains an earlier description with the number 279 by A.A. Brunt, 1992.



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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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