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Uncovering the defence responses of Eucalyptus to pests and pathogens in the genomics age.

Identifieur interne : 001F79 ( Main/Exploration ); précédent : 001F78; suivant : 001F80

Uncovering the defence responses of Eucalyptus to pests and pathogens in the genomics age.

Auteurs : Sanushka Naidoo [Afrique du Sud] ; Carsten Külheim [Australie] ; Lizahn Zwart [Afrique du Sud] ; Ronishree Mangwanda [Afrique du Sud] ; Caryn N. Oates [Afrique du Sud] ; Erik A. Visser [Afrique du Sud] ; Febé E. Wilken [Afrique du Sud] ; Thandekile B. Mamni [Afrique du Sud] ; Alexander A. Myburg [Afrique du Sud]

Source :

RBID : pubmed:25261123

Descripteurs français

English descriptors

Abstract

Long-lived tree species are subject to attack by various pests and pathogens during their lifetime. This problem is exacerbated by climate change, which may increase the host range for pathogens and extend the period of infestation by pests. Plant defences may involve preformed barriers or induced resistance mechanisms based on recognition of the invader, complex signalling cascades, hormone signalling, activation of transcription factors and production of pathogenesis-related (PR) proteins with direct antimicrobial or anti-insect activity. Trees have evolved some unique defence mechanisms compared with well-studied model plants, which are mostly herbaceous annuals. The genome sequence of Eucalyptus grandis W. Hill ex Maiden has recently become available and provides a resource to extend our understanding of defence in large woody perennials. This review synthesizes existing knowledge of defence mechanisms in model plants and tree species and features mechanisms that may be important for defence in Eucalyptus, such as anatomical variants and the role of chemicals and proteins. Based on the E. grandis genome sequence, we have identified putative PR proteins based on sequence identity to the previously described plant PR proteins. Putative orthologues for PR-1, PR-2, PR-4, PR-5, PR-6, PR-7, PR-8, PR-9, PR-10, PR-12, PR-14, PR-15 and PR-17 have been identified and compared with their orthologues in Populus trichocarpa Torr. & A. Gray ex Hook and Arabidopsis thaliana (L.) Heynh. The survey of PR genes in Eucalyptus provides a first step in identifying defence gene targets that may be employed for protection of the species in future. Genomic resources available for Eucalyptus are discussed and approaches for improving resistance in these hardwood trees, earmarked as a bioenergy source in future, are considered.

DOI: 10.1093/treephys/tpu075
PubMed: 25261123


Affiliations:


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Le document en format XML

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<div type="abstract" xml:lang="en">Long-lived tree species are subject to attack by various pests and pathogens during their lifetime. This problem is exacerbated by climate change, which may increase the host range for pathogens and extend the period of infestation by pests. Plant defences may involve preformed barriers or induced resistance mechanisms based on recognition of the invader, complex signalling cascades, hormone signalling, activation of transcription factors and production of pathogenesis-related (PR) proteins with direct antimicrobial or anti-insect activity. Trees have evolved some unique defence mechanisms compared with well-studied model plants, which are mostly herbaceous annuals. The genome sequence of Eucalyptus grandis W. Hill ex Maiden has recently become available and provides a resource to extend our understanding of defence in large woody perennials. This review synthesizes existing knowledge of defence mechanisms in model plants and tree species and features mechanisms that may be important for defence in Eucalyptus, such as anatomical variants and the role of chemicals and proteins. Based on the E. grandis genome sequence, we have identified putative PR proteins based on sequence identity to the previously described plant PR proteins. Putative orthologues for PR-1, PR-2, PR-4, PR-5, PR-6, PR-7, PR-8, PR-9, PR-10, PR-12, PR-14, PR-15 and PR-17 have been identified and compared with their orthologues in Populus trichocarpa Torr. & A. Gray ex Hook and Arabidopsis thaliana (L.) Heynh. The survey of PR genes in Eucalyptus provides a first step in identifying defence gene targets that may be employed for protection of the species in future. Genomic resources available for Eucalyptus are discussed and approaches for improving resistance in these hardwood trees, earmarked as a bioenergy source in future, are considered. </div>
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<AbstractText>Long-lived tree species are subject to attack by various pests and pathogens during their lifetime. This problem is exacerbated by climate change, which may increase the host range for pathogens and extend the period of infestation by pests. Plant defences may involve preformed barriers or induced resistance mechanisms based on recognition of the invader, complex signalling cascades, hormone signalling, activation of transcription factors and production of pathogenesis-related (PR) proteins with direct antimicrobial or anti-insect activity. Trees have evolved some unique defence mechanisms compared with well-studied model plants, which are mostly herbaceous annuals. The genome sequence of Eucalyptus grandis W. Hill ex Maiden has recently become available and provides a resource to extend our understanding of defence in large woody perennials. This review synthesizes existing knowledge of defence mechanisms in model plants and tree species and features mechanisms that may be important for defence in Eucalyptus, such as anatomical variants and the role of chemicals and proteins. Based on the E. grandis genome sequence, we have identified putative PR proteins based on sequence identity to the previously described plant PR proteins. Putative orthologues for PR-1, PR-2, PR-4, PR-5, PR-6, PR-7, PR-8, PR-9, PR-10, PR-12, PR-14, PR-15 and PR-17 have been identified and compared with their orthologues in Populus trichocarpa Torr. & A. Gray ex Hook and Arabidopsis thaliana (L.) Heynh. The survey of PR genes in Eucalyptus provides a first step in identifying defence gene targets that may be employed for protection of the species in future. Genomic resources available for Eucalyptus are discussed and approaches for improving resistance in these hardwood trees, earmarked as a bioenergy source in future, are considered. </AbstractText>
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<Affiliation>Department of Genetics, Genomics Research Institute (GRI), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria 0028, South Africa;</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Myburg</LastName>
<ForeName>Alexander A</ForeName>
<Initials>AA</Initials>
<AffiliationInfo>
<Affiliation>Department of Genetics, Genomics Research Institute (GRI), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Pretoria 0028, South Africa;</Affiliation>
</AffiliationInfo>
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</AuthorList>
<Language>eng</Language>
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<PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType>
<PublicationType UI="D016454">Review</PublicationType>
</PublicationTypeList>
</Article>
<MedlineJournalInfo>
<Country>Canada</Country>
<MedlineTA>Tree Physiol</MedlineTA>
<NlmUniqueID>100955338</NlmUniqueID>
<ISSNLinking>0829-318X</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D010940">Plant Proteins</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="C053376">pathogenesis-related proteins, plant</NameOfSubstance>
</Chemical>
</ChemicalList>
<CitationSubset>IM</CitationSubset>
<MeshHeadingList>
<MeshHeading>
<DescriptorName UI="D005052" MajorTopicYN="N">Eucalyptus</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="Y">genetics</QualifierName>
<QualifierName UI="Q000276" MajorTopicYN="Y">immunology</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010935" MajorTopicYN="N">Plant Diseases</DescriptorName>
<QualifierName UI="Q000209" MajorTopicYN="N">etiology</QualifierName>
<QualifierName UI="Q000276" MajorTopicYN="N">immunology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D057865" MajorTopicYN="Y">Plant Immunity</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010940" MajorTopicYN="N">Plant Proteins</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="Y">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM">
<Keyword MajorTopicYN="N">anatomical defences</Keyword>
<Keyword MajorTopicYN="N">biotechnology</Keyword>
<Keyword MajorTopicYN="N">breeding</Keyword>
<Keyword MajorTopicYN="N">genomic resources</Keyword>
<Keyword MajorTopicYN="N">phytohormone</Keyword>
<Keyword MajorTopicYN="N">plant immunity</Keyword>
<Keyword MajorTopicYN="N">terpenoid</Keyword>
<Keyword MajorTopicYN="N">transcriptomics</Keyword>
</KeywordList>
</MedlineCitation>
<PubmedData>
<History>
<PubMedPubDate PubStatus="entrez">
<Year>2014</Year>
<Month>9</Month>
<Day>28</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="pubmed">
<Year>2014</Year>
<Month>9</Month>
<Day>28</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2015</Year>
<Month>5</Month>
<Day>28</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">25261123</ArticleId>
<ArticleId IdType="pii">tpu075</ArticleId>
<ArticleId IdType="doi">10.1093/treephys/tpu075</ArticleId>
</ArticleIdList>
</PubmedData>
</pubmed>
<affiliations>
<list>
<country>
<li>Afrique du Sud</li>
<li>Australie</li>
</country>
</list>
<tree>
<country name="Afrique du Sud">
<noRegion>
<name sortKey="Naidoo, Sanushka" sort="Naidoo, Sanushka" uniqKey="Naidoo S" first="Sanushka" last="Naidoo">Sanushka Naidoo</name>
</noRegion>
<name sortKey="Mamni, Thandekile B" sort="Mamni, Thandekile B" uniqKey="Mamni T" first="Thandekile B" last="Mamni">Thandekile B. Mamni</name>
<name sortKey="Mangwanda, Ronishree" sort="Mangwanda, Ronishree" uniqKey="Mangwanda R" first="Ronishree" last="Mangwanda">Ronishree Mangwanda</name>
<name sortKey="Myburg, Alexander A" sort="Myburg, Alexander A" uniqKey="Myburg A" first="Alexander A" last="Myburg">Alexander A. Myburg</name>
<name sortKey="Oates, Caryn N" sort="Oates, Caryn N" uniqKey="Oates C" first="Caryn N" last="Oates">Caryn N. Oates</name>
<name sortKey="Visser, Erik A" sort="Visser, Erik A" uniqKey="Visser E" first="Erik A" last="Visser">Erik A. Visser</name>
<name sortKey="Wilken, Febe E" sort="Wilken, Febe E" uniqKey="Wilken F" first="Febé E" last="Wilken">Febé E. Wilken</name>
<name sortKey="Zwart, Lizahn" sort="Zwart, Lizahn" uniqKey="Zwart L" first="Lizahn" last="Zwart">Lizahn Zwart</name>
</country>
<country name="Australie">
<noRegion>
<name sortKey="Kulheim, Carsten" sort="Kulheim, Carsten" uniqKey="Kulheim C" first="Carsten" last="Külheim">Carsten Külheim</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

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