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00.032.0.01.005. Poa semilatent virus

Cite this publication as: ICTVdB Management (2006). 00.032.0.01.005. Poa semilatent 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: Canada.

Host of Isolate and Habitat Details
Source of isolate: Elymus trachycaulus, Poa palustris.

Natural host and symptoms
Elymus trachycaulus, Poa palustris — probably symptomless infection or faint transient leaf chlorosis (but often occurs together with hordeum mosaic and/or oat necrotic mottle viruses in plants with conspicuous leaf chlorosis).

Reference to Isolation Report
Slykhuis (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: 00.032.0.01.005. Virus accession number: 32001005. Obsolete virus code: 32.0.1.0.005; superceded accession number: 32010005.
NCBI Taxon Identifier NCBI Taxonomy ID: 12328.

Name, Synonyms and Lineage

ICTV approved acronym: PSLV. Virus is an ICTV approved species of the genus 00.032.0.01. Hordeivirus; not assigned to a family.

Virion Properties

Morphology

Virions consist of a capsid. Virus capsid is not enveloped. Capsid/nucleocapsid is elongated with helical symmetry. Virus preparations contain more than one particle component. The capsid is rod-shaped, straight with a clear modal length; with a length of 162 nm and a width of 25 nm. Axial canal is distinct. Basic helix is obvious.

Electron microscopic preparation and references: Virus preparation contains few virions. Reference for electron microscopic methods: Lane (1974).

Physicochemical and Physical Properties

The thermal inactivation point (TIP) is at 67°C. The longevity in vitro (LIV) is 120 days. Although the titer is dependent on the host, the decimal exponent (DEX) of the dilution end point is usually around 3.

Nucleic Acid

The genome is segmented; multipartite and segments are distributed over several particles of varying size, depending on the length of the genome enclosed; consists of four segments of linear, positive-sense, single-stranded RNA. The complete genome is 15600 nucleotides long. The RNA-1 is partially sequenced, sequenced region is 4500 nucleotides long. Sequence has the accession number

[M81486] Em(40)_vi:PSZBETACD Gb(84)_vi:PSZBETACD Poa semilatent virus beta genomic segment, 3' proximal end. 12/92 795bp.
[M81487] Em(40)_vi:PSZGAMRNA Gb(84)_vi:PSZGAMRNAP Poa semilatent virus gamma genomic segment, 3' terminal end. 12/92 1,519bp. 2 sequences.
RNA-2 is fully sequenced, complete sequence is 4000 nucleotides long,
RNA-3 is sequenced, but only an estimate is given, complete sequence is 3600 nucleotides long.
RNA-4 has been sequenced, but only an estimate is provided; complete sequence is 3500 nucleotides long. Reference to nucleotide sequence Lane (1974).

GenBank records for nucleotide sequences; complete genome sequences.

Proteins

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 barley stripe mosaic and lychnis ringspot viruses.

Several that differ in pathogenicity have been described. The genome of the virus does not cross-hybridize with those of barley stripe mosaic or lychnis ringspot viruses using cDNAs transcribed from them.

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 disappear soon after infection.

Transmission and Vector Relationships

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

Experimental Hosts and Symptoms

Susceptible host species are found in the Family Gramineae. The following species were susceptible to experimental virus infection: Avena sativa, Elymus trachycaulus, Hordeum vulgare, Lolium multiflorum, Phleum pratense, Poa compressa, Poa palustris, Secale cereale, Triticum aestivum, Triticum durum, Zea mays.

Experimentally infected insusceptible Hosts: Families containing insusceptible hosts: Gramineae. Species inoculated with virus that do not show signs of susceptibility: Agrostis alba, Agrostis palustris, Agrostis tenuis, Bromus inermis, Elytrigia intermedia, Elytrigia repens, Lolium perenne.

Diagnostic Hosts

Diagnostic host species and symptoms:

Avena sativa, Triticum aestivum — chlorotic leaf mottling and plant death. Diagnostic host: insusceptible host species Elytrigia repens, Agrostis palustris, Bromus inermis, Lolium perenne.

Maintenance and Propagation Hosts

Most commonly used maintenance and propagation host species are Avena sativa, Poa palustris.

Assay Hosts

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

References to host data: Slykhuis (1972).

Geographical Distribution

The virus occurs in Canada (Alberta).

List of Strains and Isolates in the Species

Mild and severe strains.

References

Carroll, TW (1986). In: The Plant Viruses, Vol. 2, The Rod-Shaped Plant Viruses, p. 388; eds M.H.V. van Regenmortel and H. Fraenkel-Conrat Plenum Press, New York.

Hunter, BG, Heaton, L.A., Bracker, C.E. and Jackson, AO (1986). Phytopathology 76: 322.

Hunter, BG, Smith, J., Fattouh, F. and Jackson, AO (1989). Intervirology 30: 18.

Jackson, AO, Hunter, BG and Gustafson, GD (1989). Ann. Rev. Phytopath. 27: 95.

Lane, LC (1974). Virology 58: 323.

Polak, Z. and Slykhuis, J. (1972). Can. J. Bot. 50: 263.

Slykhuis, J. (1972). Phytopathology 62: 508.

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 631 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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