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00.057.0.81.007. Asystasia gangetica mottle virus

Cite this publication as: ICTVdB Management (2006). 00.057.0.81.007. Asystasia gangetica 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: Cote d'Ivoire.

Host of Isolate and Habitat Details
Source of isolate: Asystasia gangetica.

Natural host and symptoms
Asystasia gangetica — vein mottle, lines and ringspots.

Reference to Isolation Report
Thouvenel et al. (1982).

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: 00.057.0.81.007. Virus accession number: 57081007. Obsolete virus code: 57.0.1.T.007; superceded accession number: 5701t007.

Name, Synonyms and Lineage

ICTV approved acronym: AGMoV. Virus is a tentative member of the genus 00.057.0.01. Potyvirus in the family 00.057. Potyviridae.

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 clear modal length with a length of 750 nm and a width of 13 nm. Axial canal is indistinct. Basic helix is obscure.

Electron microscopic preparation and references: Virus preparation contains few virions. Reference for electron microscopic methods: Thouvenel et al. (1982).

Physicochemical and Physical Properties

There are 1 sedimenting component(s) found in purified preparations. The thermal inactivation point (TIP) is at 70-75°C. The longevity in vitro (LIV) is 3 days. Although the titer is dependent on the host, the decimal exponent (DEX) of the dilution end point is usually around 3-4. The infectivity is not changed by treatment with ether.

Nucleic Acid

The Mr of the genome constitutes 5% of the virion by weight. The genome is monopartite, only one particle size is recovered of linear, positive-sense, single-stranded RNA.

Proteins

Proteins constitute about 95% of the particle weight.

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

Structural Proteins: Reference to amino acid sequence or composition Fauquet and Thouvenel (1987).

Lipids

Lipids are not reported.

Antigenicity

The virus does not show serological relationships to 30 other group members tested.

Biological Properties

Natural Host

Domain
Viral hosts belong to the Domain Eucarya.

Domain Eucarya
Kingdom Plantae.

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

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; transmitted by grafting; not transmitted by seeds.

Vector Transmission:
Virus is transmitted by arthropods, by insects of the order Hemiptera, family Aphididae; Aphis spiraecola. Virus is transmitted in a non-persistent manner.

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 Acanthaceae, Chenopodiaceae, Leguminosae-Papilionoideae, Pedaliaceae, Scrophulariaceae, Solanaceae, Tetragoniaceae. The following species were susceptible to experimental virus infection: Antirrhinum majus, Asystasia gangetica, Chenopodium amaranticolor, Nicotiana benthamiana, Nicotiana clevelandii, Nicotiana megalosiphon, Nicotiana tabacum, Phaseolus vulgaris, Sesamum indicum, Solanum nigrum, Tetragonia tetragonioides.

Host:
Experimentally infected hosts mainly show symptoms of local lesions, mosaics, ringspots.

Experimentally infected insusceptible Hosts: Families containing insusceptible hosts: Cucurbitaceae, Gramineae, or Leguminosae-Papilionoideae, Malvaceae, Solanaceae. Species inoculated with virus that do not show signs of susceptibility: Abelmoschus esculentus, Arachis hypogaea, Cucumis melo, Cucumis sativus, Cucurbita maxima, Cucurbita moschata, Cucurbita pepo, Momordica balsamina, Nicotiana glutinosa, Vigna unguiculata, Vigna unguiculata ssp. cylindrica, Zea mays.

Diagnostic Hosts

Diagnostic host species and symptoms:

Chenopodium amaranticolor, Tetragonia tetragonioides — necrotic local lesions; not systemic.

Nicotiana benthamiana — systemic mosaic, leaf curling.

Nicotiana megalosiphon — systemic mottling.

Nicotiana tabacum cvs Samsun NN and Xanthi-nc — necrotic ringspots and line pattern.

Antirrhinum majus, Phaseolus vulgaris — systemic chlorosis.

Sesamum indicum — systemic chlorotic spotting. Diagnostic host: insusceptible host species Cucurbita ssp., Cucumis ssp., Nicotiana glutinosa, Vigna unguiculata.

Maintenance and Propagation Hosts

Most commonly used maintenance and propagation host species are Nicotiana benthamiana.

Assay Hosts

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

References to host data: Thouvenel et al. (1988).

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

Cytopathology: Inclusions are present in infected cells. Inclusion bodies in the host cell are found in the cytoplasm. Cytoplasmic inclusions are pinwheels.

Geographical Distribution

The virus spreads in Africa. The virus occurs in the Congo, Cote d'Ivoire, and Guinea.

References

Fauquet, C. and Thouvenel, J.-C. (1987). In: Plant Viral Diseases in the Ivory Coast, pp. 228; Initiations, Documentations, Techniques. No.46. ORSTOM. Paris.

Thouvenel, J.-C. Fauquet, C. and Monsarrat, A (1982). C.r. Acad. Sci. Paris 295: 213.

Thouvenel, J.-C., Fauquet, C. and Fargette, D. (1988). Ann. appl. Biol. 112: 127. 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 50 by J.-C.Thouvenel, 1986. Revised 1989.



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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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