Serveur d'exploration Phytophthora

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Loop-mediated isothermal amplification for detection of the tomato and potato late blight pathogen, Phytophthora infestans.

Identifieur interne : 000B89 ( Main/Exploration ); précédent : 000B88; suivant : 000B90

Loop-mediated isothermal amplification for detection of the tomato and potato late blight pathogen, Phytophthora infestans.

Auteurs : Z R Hansen [États-Unis] ; B J Knaus [États-Unis] ; J F Tabima [États-Unis] ; C M Press [États-Unis] ; H S Judelson [États-Unis] ; N J Grünwald [États-Unis] ; C D Smart [États-Unis]

Source :

RBID : pubmed:26820117

Descripteurs français

English descriptors

Abstract

AIMS

To design and validate a colorimetric loop-mediated isothermal amplification assay for rapid detection of Phytophthora infestans DNA.

METHODS AND RESULTS

Two sets of loop-mediated isothermal amplification (LAMP) primers were designed and evaluated for their sensitivity and specificity for P. infestans. ITSII primers targeted a portion of the internal transcribed spacer region of ribosomal DNA. These primers had a limit of detection of 2 pg P. infestans DNA and cross-reacted with the closely related species Phytophthora nicotianae. Rgn86_2 primers, designed to improve assay specificity, targeted a portion of a conserved hypothetical protein. These primers had a limit of detection of 200 pg P. infestans DNA and did not cross-react with P. nicotianae. The specificity of the Rgn86_2 assay was tested further using the closely related species P. andina, P. ipomoeae, P. mirabilis and P. phaseoli. Cross-reactions occurred with P. andina and P. mirabilis, but neither species occurs on tomato or potato. Both primer sets were able to detect P. infestans DNA extracted from tomato late blight leaf lesions.

CONCLUSIONS

Two colorimetric LAMP assays detected P. infestans DNA from pure cultures as well as infected leaf tissue. The ITSII primers had higher sensitivity, and the Rgn86_2 primers had higher specificity.

SIGNIFICANCE AND IMPACT OF THE STUDY

This is the first report of a LAMP assay for the detection of P. infestans, the causal organism of potato and tomato late blight. These assays have potential for immediate utility in plant disease research and diagnostic laboratories.


DOI: 10.1111/jam.13079
PubMed: 26820117


Affiliations:


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Le document en format XML

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<term>DNA Primers (MeSH)</term>
<term>Lycopersicon esculentum (microbiology)</term>
<term>Nucleic Acid Amplification Techniques (methods)</term>
<term>Phytophthora infestans (genetics)</term>
<term>Phytophthora infestans (isolation & purification)</term>
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<term>Feuilles de plante (microbiologie)</term>
<term>Lycopersicon esculentum (microbiologie)</term>
<term>Maladies des plantes (microbiologie)</term>
<term>Phytophthora infestans (génétique)</term>
<term>Phytophthora infestans (isolement et purification)</term>
<term>Solanum tuberosum (microbiologie)</term>
<term>Techniques d'amplification d'acides nucléiques (méthodes)</term>
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<term>DNA Primers</term>
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<term>Phytophthora infestans</term>
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<term>Phytophthora infestans</term>
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<term>Nucleic Acid Amplification Techniques</term>
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<term>Lycopersicon esculentum</term>
<term>Maladies des plantes</term>
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<b>AIMS</b>
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<p>To design and validate a colorimetric loop-mediated isothermal amplification assay for rapid detection of Phytophthora infestans DNA.</p>
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<p>
<b>METHODS AND RESULTS</b>
</p>
<p>Two sets of loop-mediated isothermal amplification (LAMP) primers were designed and evaluated for their sensitivity and specificity for P. infestans. ITSII primers targeted a portion of the internal transcribed spacer region of ribosomal DNA. These primers had a limit of detection of 2 pg P. infestans DNA and cross-reacted with the closely related species Phytophthora nicotianae. Rgn86_2 primers, designed to improve assay specificity, targeted a portion of a conserved hypothetical protein. These primers had a limit of detection of 200 pg P. infestans DNA and did not cross-react with P. nicotianae. The specificity of the Rgn86_2 assay was tested further using the closely related species P. andina, P. ipomoeae, P. mirabilis and P. phaseoli. Cross-reactions occurred with P. andina and P. mirabilis, but neither species occurs on tomato or potato. Both primer sets were able to detect P. infestans DNA extracted from tomato late blight leaf lesions.</p>
</div>
<div type="abstract" xml:lang="en">
<p>
<b>CONCLUSIONS</b>
</p>
<p>Two colorimetric LAMP assays detected P. infestans DNA from pure cultures as well as infected leaf tissue. The ITSII primers had higher sensitivity, and the Rgn86_2 primers had higher specificity.</p>
</div>
<div type="abstract" xml:lang="en">
<p>
<b>SIGNIFICANCE AND IMPACT OF THE STUDY</b>
</p>
<p>This is the first report of a LAMP assay for the detection of P. infestans, the causal organism of potato and tomato late blight. These assays have potential for immediate utility in plant disease research and diagnostic laboratories.</p>
</div>
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<DescriptorName UI="D018551" MajorTopicYN="N">Lycopersicon esculentum</DescriptorName>
<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
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<DescriptorName UI="D021141" MajorTopicYN="N">Nucleic Acid Amplification Techniques</DescriptorName>
<QualifierName UI="Q000379" MajorTopicYN="Y">methods</QualifierName>
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<DescriptorName UI="D055750" MajorTopicYN="N">Phytophthora infestans</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="Y">genetics</QualifierName>
<QualifierName UI="Q000302" MajorTopicYN="N">isolation & purification</QualifierName>
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<DescriptorName UI="D010935" MajorTopicYN="N">Plant Diseases</DescriptorName>
<QualifierName UI="Q000382" MajorTopicYN="Y">microbiology</QualifierName>
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<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
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<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
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<Keyword MajorTopicYN="N">agriculture</Keyword>
<Keyword MajorTopicYN="N">diagnostics</Keyword>
<Keyword MajorTopicYN="N">late blight</Keyword>
<Keyword MajorTopicYN="N">loop-mediated isothermal amplification</Keyword>
<Keyword MajorTopicYN="N">plant pathology</Keyword>
<Keyword MajorTopicYN="N">potato</Keyword>
<Keyword MajorTopicYN="N">tomato</Keyword>
</KeywordList>
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<Year>2015</Year>
<Month>09</Month>
<Day>28</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="revised">
<Year>2016</Year>
<Month>01</Month>
<Day>20</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
<Year>2016</Year>
<Month>01</Month>
<Day>21</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez">
<Year>2016</Year>
<Month>1</Month>
<Day>29</Day>
<Hour>6</Hour>
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<PubMedPubDate PubStatus="pubmed">
<Year>2016</Year>
<Month>1</Month>
<Day>29</Day>
<Hour>6</Hour>
<Minute>0</Minute>
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<PubMedPubDate PubStatus="medline">
<Year>2016</Year>
<Month>12</Month>
<Day>27</Day>
<Hour>6</Hour>
<Minute>0</Minute>
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</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">26820117</ArticleId>
<ArticleId IdType="doi">10.1111/jam.13079</ArticleId>
</ArticleIdList>
</PubmedData>
</pubmed>
<affiliations>
<list>
<country>
<li>États-Unis</li>
</country>
<region>
<li>Californie</li>
<li>Oregon</li>
<li>État de New York</li>
</region>
<settlement>
<li>Ithaca (New York)</li>
</settlement>
<orgName>
<li>Université Cornell</li>
</orgName>
</list>
<tree>
<country name="États-Unis">
<region name="État de New York">
<name sortKey="Hansen, Z R" sort="Hansen, Z R" uniqKey="Hansen Z" first="Z R" last="Hansen">Z R Hansen</name>
</region>
<name sortKey="Grunwald, N J" sort="Grunwald, N J" uniqKey="Grunwald N" first="N J" last="Grünwald">N J Grünwald</name>
<name sortKey="Grunwald, N J" sort="Grunwald, N J" uniqKey="Grunwald N" first="N J" last="Grünwald">N J Grünwald</name>
<name sortKey="Judelson, H S" sort="Judelson, H S" uniqKey="Judelson H" first="H S" last="Judelson">H S Judelson</name>
<name sortKey="Knaus, B J" sort="Knaus, B J" uniqKey="Knaus B" first="B J" last="Knaus">B J Knaus</name>
<name sortKey="Press, C M" sort="Press, C M" uniqKey="Press C" first="C M" last="Press">C M Press</name>
<name sortKey="Smart, C D" sort="Smart, C D" uniqKey="Smart C" first="C D" last="Smart">C D Smart</name>
<name sortKey="Tabima, J F" sort="Tabima, J F" uniqKey="Tabima J" first="J F" last="Tabima">J F Tabima</name>
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