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00.071.0.01.014. Ullucus mild mottle virus

Cite this publication as: ICTVdB Management (2006). 00.071.0.01.014. Ullucus mild 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: in imported plants tested in LittleHampton; Peru (isolated in the U.K).

Host of Isolate and Habitat Details
Source of isolate: Ullucus tuberosus.

Natural host and symptoms
Ullucus tuberosus — plants also naturally infected with other viruses. Inoculated plants show mottling.

Reference to Isolation Report
Brunt 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: 00.071.0.01.014. Virus accession number: 71001014. Obsolete virus code: 71.0.1.0.014; superceded accession number: 71010014.

Name, Synonyms and Lineage

ICTV approved acronym: UMMV. Virus is an ICTV approved species of the genus 00.071.0.01. Tobamovirus; 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. The capsid is rod-shaped, straight with a clear modal length with a length of 300 nm and a width of 18 nm. Axial canal is distinct. Basic helix is obvious. Pitch of helix is 2.4 nm.

Electron microscopic preparation and references: Virus preparation contains many virions. Reference for electron microscopic methods: Brunt (1986).

Physicochemical and Physical Properties

Virions have a buoyant density in CsCl of 1.32 g cm-3 (unfixed). There are 1 sedimenting component(s) found in purified preparations. The sedimentation coefficient is 176 S20w. The thermal inactivation point (TIP) is at 90-95°C. Although the titer is dependent on the host, the decimal exponent (DEX) of the dilution end point is usually around 7.

Nucleic Acid

The Mr of the genome constitutes 5% of the virion by weight. The genome is not segmented and contains a single molecule of linear positive-sense, single-stranded RNA. The complete genome is 6400 nucleotides long. Genome is sequenced, but only an estimate is available, complete sequence is 6400 nucleotides long.

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 Van Regenmortel and Brunt, in Brunt (1986).

Lipids

Lipids are not reported.

Antigenicity

The virus is serologically related to ribgrass mosaic virus. The virus does not show serological relationships to Cucumber green mottle mosaic, Frangipani mosaic, Odontoglossum ringspot and Sunn-hemp mosaic viruses (Brunt et al., 1982; Duarte, 1986).

Biological Properties

Natural Host

Domain
Viral hosts belong to the Domain Eucarya.

Domain Eucarya
Kingdom Plantae.

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

Class Magnoliopsida (Dicotyledonae)
Subclass CARYOPHYLLIDAE; Order Caryophyllales; Family Basellaceae. Virus found in Ullucus tuberosus .

Severity and Occurrence of Disease

Host: Signs and symptoms disappear soon after infection.

Transmission and Vector Relationships

Virus is not transmitted by a vector. Virus is transmitted by mechanical inoculation; transmitted by grafting; transmitted by contact between hosts.

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, Basellaceae, Chenopodiaceae, Cucurbitaceae, Portulacaceae, Solanaceae, Tetragoniaceae. The following species were susceptible to experimental virus infection: Amaranthus caudatus, Chenopodium amaranticolor, Chenopodium capitatum, Chenopodium murale, Chenopodium quinoa, Cucumis sativus, Datura metel, Datura stramonium, Gomphrena globosa, Lycopersicon esculentum, Montia perfoliata, Nicandra physalodes, Nicotiana benthamiana, Nicotiana clevelandii, Nicotiana debneyi, Nicotiana glutinosa, Nicotiana megalosiphon, Nicotiana rustica, Nicotiana tabacum, Petunia x hybrida, Physalis floridana, Tetragonia tetragonioides, Ullucus tuberosus.

Experimentally infected insusceptible Hosts: Families containing insusceptible hosts: Cruciferae, Leguminosae-Papilionoideae, or Solanaceae. Species inoculated with virus that do not show signs of susceptibility: Arachis hypogaea, Brassica campestris ssp. pekinensis, Capsicum frutescens, Phaseolus vulgaris, Pisum sativum, Solanum tuberosum, Trifolium incarnatum, Vicia faba, Vigna unguiculata.

Diagnostic Hosts

Diagnostic host species and symptoms:

Datura metel, Nicotiana clevelandii, N. benthamiana — systemic chlorosis.

Nicotiana glutinosa, N. megalosiphon, N. rustica, N. tabacum — chlorotic or necrotic local lesions; not systemic.

Chenopodium capitatum — severe systemic leaf chlorosis.

Chenopodium amaranticolor, C. quinoa — chlorotic rings or local lesions; not systemic.

Diagnostic host: insusceptible host species Capsicum frutescens, Solanum tuberosum, Phaseolus vulgaris, Vicia faba, Vigna unguiculata.

Maintenance and Propagation Hosts

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

Assay Hosts

Host: Assay hosts (for Local lesions or Whole plants):
Chenopodium quinoa (L), Chenopodium amaranticolor (L), Chenopodium murale (L), Nicotiana glutinosa (L).

References to host data: Brunt et al. (1982, Brunt (1986).

Histopathology: Virus can be best detected in all parts of the host plant. Virions are found in the cytoplasm.

Geographical Distribution

The virus occurs in Peru.

Ecology, Epidemiology and Control

Studies reported by Brunt et al. (1982).

References

Brunt, A.A., Phillips, S., Jones, R.A.C. and Kenten, RH (1982). Ann. appl. Biol. 101: 65.

Brunt, A.A. (1986). In: The Plant Viruses Vol. 2, The Rod-Shaped Viruses, p. 283; eds M.H.V. van Regenmortel and H. Fraenkel-Conrat Plenum Press, New York.

Duarte, I.M.N. (1986). M.Sc. Thesis, 98 pp. University of Reading, U.K.

The following generic references are cited in the most recent ; .

VIDEdB, the plant virus database developed at the Australian National University by Adrian J. Gibbs and collaborators, contains an earlier description with the number 860 by A.A. Brunt and S. Molyneux, 1986.



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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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