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Sensitive and Specific Digoxigenin‐labelled RNA Probes for Routine Detection of Citrus tristeza virus by Dot‐blot Hybridization

Identifieur interne : 001665 ( Istex/Corpus ); précédent : 001664; suivant : 001666

Sensitive and Specific Digoxigenin‐labelled RNA Probes for Routine Detection of Citrus tristeza virus by Dot‐blot Hybridization

Auteurs : L. Barbarossa ; V. Savino

Source :

RBID : ISTEX:BB7DE7B99A54861466D00F8A915527DFF3AFD48B

English descriptors

Abstract

A non‐radioactive dot‐blot hybridization assay for the successful detection of Citrus tristeza virus (CTV) RNA in total nucleic acid extracts of infected citrus was developed. Two digoxigenin (DIG)‐labelled minus‐sense riboprobes, complementary to the coat protein gene sequence of a Chinese and an Apulian CTV isolate were synthesized. Several citrus tissues were evaluated as optimal virus source and leaf petioles were found appropriate material for reliable detection. The hybridization assay showed a detection limit corresponding to 0.2 mg of fresh infected tissue. The riboprobes allowed CTV detection in isolates from different geographical areas, grown in the screenhouse or in the field, resulting in similar hybridization patterns. The infected trees were tested during different seasons with positive results, although from July to August most of the samples gave a weaker hybridization signal, compared to other seasons. The high sensitivity and reliability of the molecular hybridization assay described make it a good alternative to serological methods for CTV detection.

Url:
DOI: 10.1111/j.1439-0434.2006.01102.x

Links to Exploration step

ISTEX:BB7DE7B99A54861466D00F8A915527DFF3AFD48B

Le document en format XML

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<abstract lang="en">A non‐radioactive dot‐blot hybridization assay for the successful detection of Citrus tristeza virus (CTV) RNA in total nucleic acid extracts of infected citrus was developed. Two digoxigenin (DIG)‐labelled minus‐sense riboprobes, complementary to the coat protein gene sequence of a Chinese and an Apulian CTV isolate were synthesized. Several citrus tissues were evaluated as optimal virus source and leaf petioles were found appropriate material for reliable detection. The hybridization assay showed a detection limit corresponding to 0.2 mg of fresh infected tissue. The riboprobes allowed CTV detection in isolates from different geographical areas, grown in the screenhouse or in the field, resulting in similar hybridization patterns. The infected trees were tested during different seasons with positive results, although from July to August most of the samples gave a weaker hybridization signal, compared to other seasons. The high sensitivity and reliability of the molecular hybridization assay described make it a good alternative to serological methods for CTV detection.</abstract>
<subject lang="en">
<genre>keywords</genre>
<topic>Citrus tristeza virus</topic>
<topic>detection</topic>
<topic>dot‐blot hybridization</topic>
<topic>riboprobes</topic>
<topic>total RNA</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>Journal of Phytopathology</title>
</titleInfo>
<genre type="journal">journal</genre>
<identifier type="ISSN">0931-1785</identifier>
<identifier type="eISSN">1439-0434</identifier>
<identifier type="DOI">10.1111/(ISSN)1439-0434</identifier>
<identifier type="PublisherID">JPH</identifier>
<part>
<date>2006</date>
<detail type="volume">
<caption>vol.</caption>
<number>154</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>6</number>
</detail>
<extent unit="pages">
<start>329</start>
<end>335</end>
<total>7</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">BB7DE7B99A54861466D00F8A915527DFF3AFD48B</identifier>
<identifier type="DOI">10.1111/j.1439-0434.2006.01102.x</identifier>
<identifier type="ArticleID">JPH1102</identifier>
<recordInfo>
<recordContentSource>WILEY</recordContentSource>
<recordOrigin>Blackwell Publishing Ltd</recordOrigin>
</recordInfo>
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<uri>https://api.istex.fr/document/BB7DE7B99A54861466D00F8A915527DFF3AFD48B/enrichments/multicat</uri>
</json:item>
</enrichments>
<serie></serie>
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