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00.077.0.01.012. Melon rugose mosaic virus

Cite this publication as: ICTVdB Management (2006). 00.077.0.01.012. Melon rugose mosaic 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: Yemen.

Host of Isolate and Habitat Details
Source of isolate: Citrullus lanatus.

Natural host and symptoms
Citrullus lanatus — yellowing, rugose mosaic.

Cucumis melo — severe mosaic and rugosity.

Reference to Isolation Report
Jones (1981).

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: 00.077.0.01.012. Virus accession number: 77001012. Obsolete virus code: 77.0.1.T.DE.1; superceded accession number: 7701tde1.

Name, Synonyms and Lineage

ICTV approved acronym: MRMV. Virus is an ICTV approved species of the genus 00.077.0.01. Tymovirus; family 00.077. Tymoviridae.

Virion Properties

Morphology

Virions consist of a capsid. Virus capsid is not enveloped, round with icosahedral symmetry. The isometric capsid has a diameter of 32 nm. Capsids appear round, or hexagonal in outline.

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

Physicochemical and Physical Properties

Virions have a buoyant density in CsCl of 1.39 g cm-3. There are 2 sedimenting component(s) found in purified preparations. The sedimentation coefficient is of the fastest 118 S20w; of the other(s) are 64 S20w. The thermal inactivation point (TIP) is at 55-60°C. The longevity in vitro (LIV) is 21 days (or more). Although the titer is dependent on the host, the decimal exponent (DEX) of the dilution end point is usually around 6.

Nucleic Acid

The Mr of the genome constitutes 23% of the virion by weight (B). The genome is monopartite. Only one particle size of linear, single-stranded RNA is recovered. The complete genome is 2100 nucleotides long, is sequenced and complete sequence is about 2100 nucleotides long.

Proteins

Proteins constitute about 77% of the particle weight (B).

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

Lipids

Lipids are not reported.

Antigenicity

The virus is serologically related to belladonna mottle, dulcamara mottle, Scrophularia mottle and Andean potato latent viruses, but distantly.

Diagnostics and Reference Collections

The best tests for diagnosis are mechanical inoculation to watermelon, sweetmelon and squash.

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 DILLENIIDAE.

General Symptoms in Plants Virus affects the photosynthetic system. Symptoms are expressed in the leaf include deformation and chlorosis; include deformation of leaves. Symptoms in leaves include change in texture and development of patterns or markings that are visible in the intercostal regions. Intercostal regions show malformation and chlorosis. Leaf surface can be puckered, or warped. Leaves with mosaic.

Severity and Occurrence of Disease

Host: Signs and symptoms persist.

Transmission and Vector Relationships

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

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 Cucurbitaceae. The following species were susceptible to experimental virus infection: Citrullus lanatus, Cucumis melo, Cucumis sativus, Cucurbita pepo.

Experimentally infected insusceptible Hosts: Families containing insusceptible hosts: Chenopodiaceae, Cruciferae, Solanaceae. Species inoculated with virus that do not show signs of susceptibility: Brassica campestris ssp. chinensis, Chenopodium amaranticolor, Datura stramonium, Nicotiana clevelandii, Nicotiana tabacum.

Diagnostic Hosts

Diagnostic host species and symptoms:

Citrullus lanatus, Cucumis melo, C. sativus, Cucurbita pepo — systemic mosaic. Diagnostic host: insusceptible host species Chenopodium amaranticolor, Brassica campestris ssp. chinensis, Datura stramonium, Nicotiana clevelandii, N. tabacum cv. Xanthi-nc.

Maintenance and Propagation Hosts

Most commonly used maintenance and propagation host species are Citrullus lanatus, Cucumis melo.

Assay Hosts

Host: Assay hosts (for Local lesions or Whole plants):
Citrullus lanatus (W), Cucumis melo (W), C. sativus (W), Cucurbita pepo (W).

References to host data: Jones et al. (1986).

Geographical Distribution

The virus occurs in Yemen.

References

Jones, P. (1981). Ann. Rep. Rothamsted Exp. Stn.

Jones, P., Ba Angood S. and Carpenter J.M. (1986). Ann. appl. Biol. 108: 303.
The following generic references are cited in the most recent ICTV Report.
A description of this taxon in VIDEdB, the plant virus database developed at the Australian National University by Adrian J. Gibbs and collaborators, contains an earlier description with the number 489 by P. Jones, 1984. 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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Last updated on 25 April 2006 by Cornelia Büchen-Osmond
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