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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.

00.060.0.07. Fijivirus


Cite this publication as: ICTVdB Management (2006). 00.060.0.07. Fijivirus. 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

Classification

This is a description of a plant and invertebrate (viruses replicate in and are transmitted by delphacid planthoppers infecting phloem cells of susceptible plants) virus at the genus level.

ICTVdB Virus Code: 00.060.0.07. Virus accession number: 060007GE. Obsolete virus code: 60.0.7.; superceded accession number: 60070000.
NCBI Taxon Identifier NCBI Taxonomy ID: 10988.

Name, Synonyms and Lineage

Synonym(s): Plant reovirus subgroup 2. Virus is of the family 00.060. Reoviridae.

Virion Properties

Morphology

Virions consist of a capsid, a core, and a nucleoprotein complex. Virus capsid is not enveloped. Fijiviruses have a fragile structure, unless prefixed , viruses readily break down in vitro to give cores. Capsid/nucleocapsid is round and exhibits icosahedral symmetry. The isometric capsid has a diameter of 65-80 nm. The capsid shells of virions are composed of two layers. All shells are usually present. Capsids appear round. The capsid surface structure reveals a regular pattern with distinctive features. The capsomer arrangement is clearly visible, or is not obvious. Surface projections are distinct "A"-type spikes protruding from the 12 vertices (about 11 nm in length and breadth). Inner capsids have a diameter of 55 nm. Virus preparations contain one particle component. The core is spherical with a diameter of 35 nm.

Only one species is recovered in preparations. Incomplete particles are common. They are disintegrated particles.

Electron microscopic preparation and references: Virus preparation contains few virions, or many virions.

Physicochemical and Physical Properties

There are 1 sedimenting component(s) found in purified preparations, or 2 sedimenting component(s) found in purified preparations, or 3 sedimenting component(s) found in purified preparations, or 4 sedimenting component(s) found in purified preparations. The sedimentation coefficient is 400 S20w. The thermal inactivation point (TIP) is at 60°C. The longevity in vitro (LIV) is 6-6.5-7 days. Although the titer is dependent on the host, the decimal exponent (DEX) of the dilution end point is usually around 5-6.

Nucleic Acid

The genome is monomeric; segmented and consists of ten segments of linear double-stranded RNA. Minor species of non-genomic nucleic acid are not found in virions. The complete genome is 23890-26250-28910 nucleotides long. Size and groupings of the genome species characteristic and distinctive for the three serogroups), is sequenced, complete sequence is about 3405-3950-4400 nucleotides long.   Is is about 3200-3459-3900 nucleotides long, is sequenced, complete sequence is 3150-3379-3700 nucleotides long, has been sequenced, but only an estimate is provided; complete sequence is 2600-3231-3700 nucleotides long and has been sequenced, but only an estimate is presented, complete sequence is 2550-2975-3300 nucleotides long. RNA-6 has been fully sequenced, complete sequence is 2293-2488-2900 nucleotides long. The 5'-terminal sequence has conserved regions. The 3'-terminus has conserved nucleotide sequences; in species of same genus; in all RNA species. The multipartite genome is found in one type of particle only. Each virion contains a single copy of the genome; a full length copy.

GenBank records for nucleotide sequences; complete genome sequences.

Proteins

The viral genome encodes structural proteins and non-structural proteins. Virions consist of 3 structural protein(s), or 6 structural protein(s).

Lipids

Lipids are absent.

Genome Organization and Replication

By itself, genomic nucleic acid is not infectious.

Translation: The genome replicates in the cytoplasm, or cytoplasmic viroplasma.

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, or not transmitted by mechanical inoculation; not transmitted by grafting; not transmitted by contact between hosts; not transmitted by seeds; not transmitted by pollen.

Vector Transmission:
Virus is transmitted by arthropods, by insects of the order Hemiptera, family Delphacidae. Virus is transmitted in a persistent manner; retained when the vector moults; replicates in the vector; transmitted congenitally to the progeny of the vector, or not transmitted congenitally to the progeny of the vector; does not require a helper virus for vector transmission.

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 Alliaceae, Gramineae. The following species were susceptible to experimental virus infection: Allium sativum, Arrhenatherum elatius, Avena fatua, Avena sativa, Cynodon dactylon, Cynosurus cristatus, Digitaria decumbens, Digitaria longiflora, Digitaria pentzii, Digitaria sanguinalis, Digitaria setivalvola, Digitaria valida, Echinochloa crus-galli, Festuca pratensis, Holcus lanatus, Hordeum vulgare, Lagurus ovatus, Lolium multiflorum, Lolium perenne, Lolium temulentum, Oryza sativa, Oryza sativa var. japonica, Phalaris canariensis, Poa annua, Saccharum officinarum, Secale cereale, Setaria italica, Setaria verticillata, Sorghum bicolor, Triticum aestivum, Triticum sativum, Zea mays.

Experimentally infected insusceptible Hosts: Families containing insusceptible hosts: Gramineae. Species inoculated with virus that do not show signs of susceptibility: Agrostis gigantea, Alopecurus myosuroides, Apera spica-venti, Bromus inermis, Chloris gayana, Digitaria sanguinalis, Echinochloa crus-galli, Elytrigia repens, Saccharum officinarum, Sorghum halepense, Stipa bromoides.

Histopathology: Virions are found in the cytoplasm, or cell vacuole.

Cytopathology: Inclusions are present in infected cells. Inclusion bodies in the host cell are found in the cytoplasm and nucleus. Nuclear inclusion bodies are crystals. Cytoplasmic inclusions are crystals, or viroplasma. Inclusions contain mature virions.

Geographical Distribution

Geographical distribution of the virus is probably restricted. The virus spreads in Africa, or Eurasia, or Australasia and Pacific Islands. The virus occurs in Argentina, or Australia, or Brazil, or China, or Czechoslovakia (former), or Fiji, or Finland, or France, or Germany, or Guyana, or Israel, or Italy, or Japan, or Korea (North), or Korea (South), or Norway, or Papua New Guinea, or Peru, or the Philippines, or Poland, or Spain, or Sweden, or Taiwan, or Thailand, or the United Kingdom, or Samoa, or Yugoslavia.

Taxonomic Structure of the Genus

Type species 00.060.0.07.001. Fiji disease virus .

Species in the Genus

List of Species in the Genus.

Data Sources and Contributions

The description has been compiled from data in the ICTV Report presented by Holmes IH, Boccardo G, Estes MK, Furuichi MK, Hoshino Y, Joklik WK, McCrae M, Mertens PPC, Milne RG, Samal KSK, Shikata E, Winton JR, Uyeda I, Nuss DL.

References

The following generic references are cited in the most recent ICTV Report.

PubMed References.
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 294.

Taxonomic Proposals and Changes

There are 3 antigenic groups of Fijiviruses.

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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Comments to ICTVdB Management
Last updated on 25 April 2006 by Cornelia Büchen-Osmond
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