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00.078.0.81.010. Sunflower yellow blotch virus

Cite this publication as: ICTVdB Management (2006). 00.078.0.81.010. Sunflower yellow blotch 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: Australia.

Host of Isolate and Habitat Details
Source of isolate: Helianthus annuus.

Natural host and symptoms
Glycine max, Helianthus annuus, Lycopersicon esculentum — mosaic, ringspots and/or line patterns.

Reference to Isolation Report
J.L. Dale; unpublished information.

Classification

This is a description of a plant virus at the species level.

ICTVdB Virus Code: 00.078.0.81.010. Virus accession number: 78081010. Obsolete virus code: 78.0.1.T.008; superceded accession number: 7801t008.

Name, Synonyms and Lineage

The taxon has the accepted ICTV name.

Synonym(s): Sunflower yellow ringspot virus. ICTV approved acronym: SuYBV. Virus is a tentative member of the genus 00.078.0.01. Umbravirus; not assigned to a family.

Virion Properties

Enveloped structures occur in vacuoles of infected cells, but no conventional virus structure have been found. Particles contain nucleic acid. Virus relies for encapisadtion and transmittion on the vector of the helper virus and virus relies on the coat protein (CP) from a helper virus, characteristically from a virus in the family (Luteoviridae).

Virion Properties

Morphology

No true particles are found, but vesicles containing viral matter are recovered that consist of a nucleoprotein complex. During their life cycle, virions have not been observed outside a cellular environment. Virions measure 28 nm in diameter.

Electron microscopic preparation and references: Virus preparation contains few virions.

Physicochemical and Physical Properties

There are 1 sedimenting component(s) found in purified preparations. The thermal inactivation point (TIP) is at 55-60°C. The longevity in vitro (LIV) is 1-2 days. Although the titer is dependent on the host, the decimal exponent (DEX) of the dilution end point is usually around 4-5. The infectivity is retained when deproteinized with phenol or detergent.

Nucleic Acid

The genome is segmented (?, consists of four segments of, or five 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, that is mRNA. The complete genome is 10761 nucleotides long, is fully sequenced, complete sequence is 3380 nucleotides long, is sequenced, but only an estimate is available, complete sequence is 2648 nucleotides long.   Is sequenced, but only an estimate is given, complete sequence is 2507 nucleotides long, has been sequenced, but only an estimate is provided; complete sequence is 1409 nucleotides long and has been sequenced, but only an estimate is presented, complete sequence is 817 nucleotides long.

Proteins

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

Structural Proteins: Reference to amino acid sequence or composition J.L. Dale (unpublished data).

Lipids

Lipids are present and located in the vesicles encapsidating the viral nucleic acid.

Antigenicity

The virus does not show serological relationships to Prunus necrotic ringspot, cucumber mosaic, alfalfa mosaic, prune dwarf and tobacco streak viruses.

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 ASTERIDAE; Order Asterales;
Family Asteraceae (~Compositae) . Virus found in Helianthus annuus (common sunflower) [TaxID 4232].

General Symptoms in Plants Virus affects the photosynthetic system. Symptoms are expressed in the leaf include chlorosis and development of patterns or markings that are visible in the intercostal regions. Intercostal regions show chlorosis. Leaves are turning yellow. Leaves with blotches.

Severity and Occurrence of Disease

Host: Signs and symptoms disappear soon after infection.

Transmission and Vector Relationships

Virus is transmitted by mechanical inoculation; transmitted by grafting; probably transmitted by seeds.

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, Caryophyllaceae, Chenopodiaceae, Compositae, Cruciferae, Cucurbitaceae, Leguminosae-Papilionoideae, Solanaceae. The following species were susceptible to experimental virus infection: Capsella bursa-pastoris, Chenopodium amaranticolor, Chenopodium quinoa, Cucurbita maxima, Galinsoga parviflora, Glycine max, Gomphrena globosa, Helianthus annuus, Lathyrus odoratus, Lens culinaris, Lycopersicon esculentum, Macrotyloma uniflorum, Nicandra physalodes, Nicotiana clevelandii, Nicotiana glutinosa, Petunia x hybrida, Phaseolus vulgaris, Physalis floridana, Pisum sativum, Spinacia oleracea, Stellaria media, Trifolium incarnatum, Vicia faba, Vigna unguiculata.

Diagnostic Hosts

Diagnostic host species and symptoms:

Pisum sativum — systemic chlorosis.

Chenopodium amaranticolor — local lesions.

Maintenance and Propagation Hosts

Most commonly used maintenance and propagation host species are Pisum sativum.

Assay Hosts

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

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

Cytopathology: Inclusions are not present in infected cells.

Geographical Distribution

The virus occurs in Australia.

References

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 775 by J.L. Dale, 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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Comments to ICTVdB Management
Last updated on 25 April 2006 by Cornelia Büchen-Osmond
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