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00.057.0.81.020. Cowpea rugose mosaic virus

Cite this publication as: ICTVdB Management (2006). 00.057.0.81.020. Cowpea 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: Piaui State; Brazil.

Host of Isolate and Habitat Details
Source of isolate: Vigna unguiculata ssp. unguiculata.

Natural host and symptoms
Vigna unguiculata ssp. unguiculata.

Reference to Isolation Report
Santos (1981, Santos et al. (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: 00.057.0.81.020. Virus accession number: 57081020. Obsolete virus code: 57.0.1.T.020; superceded accession number: 5701t020.

Name, Synonyms and Lineage

ICTV approved acronym: CPRMV. Virus is an ICTV approved species of the genus 00.057.0.01. Potyvirus in the family 00.057. Potyviridae.

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 clear modal length with a length of 730 nm and a width of 15 nm. Axial canal is indistinct. Basic helix is obscure.

Electron microscopic preparation and references: Virus preparation contains few virions. Reference for electron microscopic methods: Kitajima: extraction in phosphate buffer + EDTA + Na2SO3. Clarification in 8% n-butanol. Differential centrifugation, then into sucrose cushion, and finally density gradient. Yields c. 6 mg per kg.

Physicochemical and Physical Properties

The thermal inactivation point (TIP) is at 60-65°C. The longevity in vitro (LIV) is 7-9 days. Although the titer is dependent on the host, the decimal exponent (DEX) of the dilution end point is usually around 3-4.

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.

Antigenicity

The virus does not show serological relationships to soybean mosaic, blackeye cowpea mosaic, turnip mosaic, bean common mosaic and watermelon mosaic 1 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).

General Symptoms in Plants Symptoms rugose mosaic.

Severity and Occurrence of Disease

Host: Signs and symptoms persist.

Transmission and Vector Relationships

Virus is transmitted by a vector (probably). Virus is transmitted by mechanical inoculation; not transmitted by seeds.

Vector Transmission:
Virus is transmitted by arthropods, by insects of the order Hemiptera, family Aphididae; Myzus persicae, Aphis neri. Virus is not transmitted by Aphis coreopsidis, A citricola, Dactynotus sp. Virus is transmitted in a non-persistent manner.

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, Chenopodiaceae, Leguminosae-Papilionoideae. The following species were susceptible to experimental virus infection: Centrosema, Chenopodium amaranticolor, Chenopodium murale, Chenopodium quinoa, Gomphrena globosa, Phaseolus vulgaris, Pisum sativum, Vigna unguiculata, Vigna unguiculata ssp. unguiculata.

Experimentally infected insusceptible Hosts: Families containing insusceptible hosts: Compositae, Gramineae, or Leguminosae-Caesalpinioideae, Leguminosae-Papilionoideae, Solanaceae. Species inoculated with virus that do not show signs of susceptibility: Cassia obtusifolia, Cichorium endiva, Crotalaria paulina, Datura stramonium, Glycine max, Lactuca sativa, Lycopersicon esculentum, Nicandra physalodes, Nicotiana rustica, Nicotiana tabacum, Solanum melongena, Sonchus oleraceus, Zea mays.

Diagnostic Hosts

Diagnostic host species and symptoms:

Vigna unguiculata, Phaseolus vulgaris, Pisum sativum, Chenopodium amaranticolor, C. quinoa, C. murale, Gomphrena globosa, Centrosema sp.

Diagnostic host: insusceptible host species Glycine max, Crotalaria paulina, Nicotiana tabacum, Sonchus oleraceus, Zea mays.

Maintenance and Propagation Hosts

Most commonly used maintenance and propagation host species are Vigna unguiculata ssp. unguiculata, Phaseolus vulgaris.

Assay Hosts

Host: Assay hosts (for Local lesions or Whole plants):
Chenopodium quinoa (L), Vigna unguiculata ssp. unguiculata (W).

Histopathology: Virus can be best detected in leaves, mesophyll and epidermis. Virions are found in the cytoplasm.

Cytopathology: Inclusions are present in infected cells. Inclusion bodies in the host cell are found in the cytoplasm. Cytoplasmic inclusions are pinwheels.

Geographical Distribution

The virus occurs in Brazil (Praui).

References

Santos, AA (1981). M.Sc. Dissertation, Univ. Brasilia.

Santos, AA, Lin, M.T. and Kitajima, E.W. (1981). Phytopathology 71: 890.

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 256 by E.W. Kitajima, 1991.



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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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