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00.010.0.03.006. Melandrium yellow fleck virus

Cite this publication as: ICTVdB Management (2006). 00.010.0.03.006. Melandrium yellow fleck 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: Hungary.

Host of Isolate and Habitat Details
Source of isolate: Melandrium album.

Natural host and symptoms
Melandrium album — systemic vein clearing and yellow flecks.

Reference to Isolation Report
Hollings and Stone (1978).

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: 00.010.0.03.006. Virus accession number: 10003006. Obsolete virus code: 10.0.3.0.006; superceded accession number: 10030006.

Name, Synonyms and Lineage

ICTV approved acronym: MYFV. Virus is an ICTV approved species of the genus 00.010.0.03. Bromovirus in the family 00.010. Bromoviridae.

Virion Properties

Morphology

Virions consist of a capsid. Virus capsid is not enveloped, round with icosahedral symmetry. The isometric capsid has a diameter of 25 nm. Virus preparations contain more than one particle component.




















Electron micrograph of Bromoviridae.

Electron microscopic preparation and references: Reference for electron microscopic methods: Hollings et al. (1981).

Physicochemical and Physical Properties

The thermal inactivation point (TIP) is at 85°C. The longevity in vitro (LIV) is 25 days. Although the titer is dependent on the host, the decimal exponent (DEX) of the dilution end point is usually around 5.

Nucleic Acid

The Mr of the genome constitutes 20% of the virion by weight. The genome is segmented, tripartite (segements are distribute among 3 particle types of different size), and consists of three segments of to four segments of linear positive-sense, single-stranded RNA. Minor species of non-genomic nucleic acid are also found in virions. The encapsidated nucleic acid is mainly of genomic origin, but virions may also contain subgenomic RNA. The multipartite genome is divided among more than one type of particle and the segments are distributed between 3 different types of particles. The largest particles contain each one molecule of RNA-1 (sedimenting component B). The medium sized particles contain each one molecule of RNA-2 (sedimenting component M). The smallest particles contain one molecule each of RNA-3 and RNA-4 (sedimenting component T).

Proteins

The viral genome encodes structural proteins and non-structural proteins located in the capsid.

Structural Proteins: Capsid protein is involved in viral encapsidation and involved in protein movement.

Lipids

Lipids are absent.

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.

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 many families. Susceptible host species are found in the Family Amaranthaceae, Caryophyllaceae, Chenopodiaceae, Compositae, Cucurbitaceae, Leguminosae-Papilionoideae, Nolanaceae, Solanaceae, Tetragoniaceae, Tropaeolaceae. The following species were susceptible to experimental virus infection: Calendula officinalis, Chenopodium amaranticolor, Chenopodium hybridum, Chenopodium murale, Chenopodium quinoa, Cucumis sativus, Cucurbita maxima, Cucurbita moschata, Datura ferox, Datura metel, Datura stramonium, Dianthus caryophyllus, Emilia flammea, Gomphrena globosa, Helianthus annuus, Lycium barbarum, Melandrium album, Nicandra physalodes, Nicotiana clevelandii, Nicotiana glutinosa, Nicotiana glutinosa x N. clevelandii, Nicotiana tabacum, Nolana prostrata, Petunia x hybrida, Phaseolus acutifolius, Phaseolus lunatus, Phaseolus tuberosus, Phaseolus vulgaris, Physalis aequata, Physalis floridana, Physalis franchetii, Pisum sativum, Tetragonia tetragonioides, Tropaeolum majus, Vicia faba.

Experimentally infected insusceptible Hosts: Families containing insusceptible hosts: Caryophyllaceae, Cruciferae, or Leguminosae-Papilionoideae. Species inoculated with virus that do not show signs of susceptibility: Brassica campestris ssp. pekinensis, Brassica oleracea, Crambe abyssinica, Dianthus caryophyllus (cv. Joker), Trifolium incarnatum.

Diagnostic Hosts

Diagnostic host species and symptoms:

Chenopodium quinoa, Phaseolus vulgaris — necrotic local lesions.

Nicotiana clevelandii — chlorotic/necrotic local lesions, then systemic mottle.

Gomphrena globosa — necrotic local lesions, then systemic mottle.

Datura stramonium — chlorotic spots, not systemic.

Nicotiana glutinosa — chlorotic local lesions.

Tetragonia tetragonioides — necrotic local lesions, then systemic vein yellowing.

Lycium barbarum — chlorotic/necrotic local lesions.

Physalis aequata — chlorotic/necrotic systemic vein clearing, mosaic.

Diagnostic host: insusceptible host species Dianthus caryophyllus cv. Joker, Brassica campestris ssp. pekinensis, B. oleracea, Crambe abyssinica, Trifolium incarnatum.

Maintenance and Propagation Hosts

Most commonly used maintenance and propagation host species are Nicotiana clevelandii, Gomphrena globosa, Melandrium album, Tropaeolum majus, Physalis franchetii.

Assay Hosts

Host: Assay hosts (for Local lesions or Whole plants):
Chenopodium quinoa (L), C. amaranticolor (L), Phaseolus vulgaris (L), Emilia flammea (L), Phaseolus tuberosus (L), Gomphrena globosa (W), Pisum sativum (W), Nolana prostrata (W).

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

Histopathology: Virus can be best detected in leaves, roots and stems.

Geographical Distribution

The virus occurs in Hungary.

References

Hollings, M. and Horváth, J. (1978). Rep. Glasshouse Crops Res. Inst. 1977, p.129.

Hollings, M. and Horváth, J. (1981). CMI/AAB Descr. Pl. Viruses No. 236, 4 pp.

Hollings, M., Horváth, J. and Besada, W.H. (1981). 3rd Int. Congr. Pl. Path., München, 1978 p.26.

Horváth, J., Hollings, M. and Barton, RJ (1988). Acta Phytopath. Ent. 23: 449.

The following generic references are cited in the most recent ICTV Report.
A description of this taxon can also be found on the web at VIDEdB, the plant virus database developed at the Australian National University by Adrian J. Gibbs and collaborators, contains an earlier description; VIDEdB, the plant virus database developed at the Australian National University by Adrian J. Gibbs and collaborators, contains an earlier description with the number 484 by J. Horváth, 1987.

A description of the virus is found in DPV, a database for plant viruses developed by the Association of Applied Biologists (AAB), with the number 236.



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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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