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00.017.0.81.014. Clover yellows virus

Cite this publication as: ICTVdB Management (2006). 00.017.0.81.014. Clover yellows 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: Tokyo; Japan.

Host of Isolate and Habitat Details
Source of isolate: Trifolium repens.

Natural host and symptoms
Trifolium repens, T. incarnatum — yellowing or reddening.

Reference to Isolation Report
Ohki et al., 1976.

Classification

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

ICTVdB Virus Code: 00.017.0.81.014. Virus accession number: 17081014. Obsolete virus code: 17.0.1.DE.02; superceded accession number: 1701de02.

Name, Synonyms and Lineage

ICTV approved acronym: CYV. Virus is an ICTV approved species of the genus 00.017.0.01. Closterovirus in the family 00.017. Closteroviridae.

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 length of 1700 nm and a width of 12 nm. Axial canal is indistinct. Basic helix is obvious. Pitch of helix is 3.7 nm.

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

Nucleic Acid

The genome is monopartite. Only one particle size of linear, positive-sense, single-stranded RNA is recovered.

Proteins

The viral genome encodes structural proteins and non-structural proteins.

Lipids

Lipids are not reported.

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 not transmitted by mechanical inoculation; not transmitted by contact between hosts.

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

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 Leguminosae-Papilionoideae. The following species were susceptible to experimental virus infection: Pisum sativum, Trifolium incarnatum, Trifolium repens, Vicia faba.

Host:
Experimentally infected hosts mainly show symptoms of yellowing, reddening.

Experimentally infected insusceptible Hosts: Families containing insusceptible hosts: Amaranthaceae, Chenopodiaceae, or Leguminosae-Papilionoideae, Solanaceae. Species inoculated with virus that do not show signs of susceptibility: Beta vulgaris, Chenopodium amaranticolor, Gomphrena globosa, Nicotiana glutinosa, Nicotiana tabacum, Vicia faba, Vigna unguiculata.

Diagnostic Hosts

Diagnostic host species and symptoms:

Pisum sativum, Vicia faba — systemic yellowing.

Maintenance and Propagation Hosts

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

Assay Hosts

Host: Assay hosts (for Local lesions or Whole plants):
Pisum sativum, Vicia faba.

References to host data: Ohki et al. (1976).

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

Cytopathology: Inclusions are present in infected cells. Inclusion bodies in the host cell are found in the cytoplasm. Inclusions are banded bodies and containing vesicles fibril. Inclusions contain mature virions. Other cellular changes include necrosis and vesicles in phloem cells.

Geographical Distribution

The virus occurs in Japan.

References

Ohki, S.T., Doi, Y. and Yora, K. (1976). Ann. Phytopath. Soc. Japan 42: 313.

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 231 by S.T. Ohki, 1981. Revised 1984.



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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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