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00.056.0.01.002. Asparagus 3 virus

Cite this publication as: ICTVdB Management (2006). 00.056.0.01.002. Asparagus 3 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: Japan.

Host of Isolate and Habitat Details
Source of isolate: Asparagus sp.

Natural host and symptoms
Asparagus ssp. — faint leaf chlorosis.

Reference to Isolation Report
Fujisawa (1986).

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: 00.056.0.01.002. Virus accession number: 56001002. Obsolete virus code: 56.0.1.0.002; superceded accession number: 56010002.
NCBI Taxon Identifier NCBI Taxonomy ID: 39681.

Name, Synonyms and Lineage

ICTV approved acronym: AV-3. Virus is an ICTV approved species of the genus 00.056.0.01. Potexvirus in the family 00.056. Flexiviridae.

Virion Properties

Morphology

Virions consist of a capsid. Virus capsid is not enveloped. Capsid/nucleocapsid is elongated with helical symmetry. The capsid is filamentous, flexuous with a length of 580 nm and a width of 13 nm. Axial canal is indistinct. Basic helix is obscure.

Electron microscopic preparation and references: Virus preparation contains many virions. Use glutaraldehyde or osmic acid to fix. Reference for electron microscopic methods: Fujisawa (1986).

Physicochemical and Physical Properties

There are 1 sedimenting component(s) found in purified preparations. A260/A280 ratio is 1.18-1.19. The thermal inactivation point (TIP) is at 60°C. The longevity in vitro (LIV) is 23 days. Although the titer is dependent on the host, the decimal exponent (DEX) of the dilution end point is usually around 4.

Nucleic Acid

The genome is monopartite. Only one particle size of linear, positive-sense, single-stranded RNA is recovered.

GenBank records for nucleotide sequences; complete genome sequences.

Proteins

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

Lipids

Lipids are not reported.

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

Coding Strategy of Segment 1: Sequence has a gene block. Sequence has triple gene block sequence (TGB). Encodes proteins involved in cell to cell movement.

Antigenicity

The virus is serologically related to cactus X and narcissus mosaic viruses. The virus does not show serological relationships to white clover mosaic, clover yellow mosaic, potato X and tulip X viruses.

Diagnostics and Reference Collections

The best tests for diagnosis are bioassay on test plants: Sesamum indicum, Vicia faba.

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 vary seasonally.

Transmission and Vector Relationships

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

Vector Transmission: Virus is not transmitted by aphids.

Experimental Hosts and Symptoms

Under experimental conditions susceptibility to infection by virus is found in several families. Susceptible host species are found in the Family Amaranthaceae, Asparagaceae, Chenopodiaceae, Compositae, Leguminosae-Papilionoideae, Pedaliaceae, Solanaceae, Tetragoniaceae. The following species were susceptible to experimental virus infection: Amaranthus retroflexus, Asparagus, Beta vulgaris, Chenopodium amaranticolor, Chenopodium murale, Chenopodium quinoa, Datura metel, Datura stramonium, Glycine max, Gomphrena globosa, Nicotiana benthamiana, Nicotiana clevelandii, Nicotiana debneyi, Nicotiana glutinosa, Nicotiana megalosiphon, Nicotiana rustica, Nicotiana tabacum, Pisum sativum, Sesamum indicum, Solanum tuberosum, Spinacia oleracea, Tetragonia tetragonioides, Vicia faba, Vigna angularis, Vigna unguiculata ssp. sesquipedalis , Zinnia elegans.

Host:
Experimentally infected hosts mainly show symptoms of mosaic, mild mosaic and necrotic local lesions.

Experimentally infected insusceptible Hosts: Families containing insusceptible hosts: Alliaceae, Caryophyllaceae, Cruciferae, or Cucurbitaceae, Gramineae, Leguminosae-Papilionoideae, Solanaceae. Species inoculated with virus that do not show signs of susceptibility: Allium cepa, Allium fistulosum, Brassica campestris ssp. pekinensis, Brassica campestris ssp. rapa, Brassica oleracea var. capitata, Capsicum annuum, Cucumis melo, Cucumis sativus, Cucurbita maxima, Cucurbita pepo, Dianthus caryophyllus, Hordeum vulgare, Lycopersicon esculentum, Petunia x hybrida, Phaseolus vulgaris, Triticum aestivum, Zea mays.

Diagnostic Hosts

Diagnostic host species and symptoms:

Chenopodium quinoa, Nicotiana clevelandii — mosaic.

Spinacia oleracea — symptomless systemic infection.

Nicotiana tabacum cv. Bright Yellow, Vicia faba — necrotic local lesions; not systemic.

Nicotiana debneyi, Glycine max — mild mosaic. Diagnostic host: insusceptible host species Allium cepa, A fistulosum, Lycopersicon esculentum, Brassica campestris ssp. rapa, Cucurbita pepo.

Maintenance and Propagation Hosts

Most commonly used maintenance and propagation host species are Nicotiana debneyi, N. megalosiphon, N. clevelandii.

Assay Hosts

Host: Assay hosts (for Local lesions or Whole plants):
Chenopodium amaranticolor (L), Vicia faba (L), Sesamum indicum (L), Nicotiana benthamiana (W).

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

Cytopathology: Inclusions are not present in infected cells.

Geographical Distribution

The virus spreads in East Asia. The virus occurs in Japan.

References

Fujisawa, I. (1986). Ann. Phytopath. Soc. Japan 52: 2.

Hull, R., Brown, F. and Payne, C. (1989). In: Virology: Directory and Dictionary of Animal, Bacterial and Plant Viruses. Macmillan Press, U.K. 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 48 by I. Fujisawa, 1990.



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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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