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Transcriptome Profiling of Melaleuca quinquenervia Challenged by Myrtle Rust Reveals Differences in Defense Responses Among Resistant Individuals.

Identifieur interne : 000286 ( Main/Exploration ); précédent : 000285; suivant : 000287

Transcriptome Profiling of Melaleuca quinquenervia Challenged by Myrtle Rust Reveals Differences in Defense Responses Among Resistant Individuals.

Auteurs : Ji-Fan Hsieh [Australie] ; Aaron Chuah [Australie] ; Hardip R. Patel [Australie] ; Karanjeet S. Sandhu [Australie] ; William J. Foley [Australie] ; Carsten Külheim [Australie]

Source :

RBID : pubmed:29135360

Descripteurs français

English descriptors

Abstract

Plants have developed complex defense mechanisms to protect themselves against pathogens. A wide-host-range fungus, Austropuccinia psidii, which has caused severe damage to ecosystems and plantations worldwide, is a major threat to Australian ecosystems dominated by members of the family Myrtaceae. In particular, the east coast wetland foundation tree species Melaleuca quinquenervia, appears to be variably susceptible to this pathogen. Understanding the molecular basis of host resistance would enable better management of this rust disease. We identified resistant and susceptible individuals of M. quinquenervia and explored their differential gene expression in order to discover the molecular basis of resistance against A. psidii. Rust screening of germplasm showed a varying degree of response, with fully resistant to highly susceptible individuals. We used transcriptome profiling in samples collected before and at 5 days postinoculation (dpi). Differential gene expression analysis showed that numerous defense-related genes were induced in susceptible plants at 5 dpi. Mapping reads against the A. psidii genome showed that only susceptible plants contained fungal-derived transcripts. Resistant plants exhibited an overexpression of candidate A. psidii resistance-related genes such as receptor-like kinases, nucleotide-binding site leucine-rich repeat proteins, glutathione S-transferases, WRKY transcriptional regulators, and pathogenesis-related proteins. We identified large differences in the expression of defense-related genes among resistant individuals.

DOI: 10.1094/PHYTO-09-17-0307-R
PubMed: 29135360


Affiliations:


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Le document en format XML

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<term>Basidiomycota (physiology)</term>
<term>Disease Resistance (genetics)</term>
<term>Ecosystem (MeSH)</term>
<term>Gene Expression Profiling (MeSH)</term>
<term>Gene Expression Regulation, Plant (MeSH)</term>
<term>Melaleuca (genetics)</term>
<term>Melaleuca (immunology)</term>
<term>Melaleuca (microbiology)</term>
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<term>Plant Diseases (immunology)</term>
<term>Plant Diseases (microbiology)</term>
<term>Plant Leaves (genetics)</term>
<term>Plant Leaves (immunology)</term>
<term>Plant Leaves (microbiology)</term>
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<term>Trees (MeSH)</term>
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<term>Analyse de profil d'expression de gènes (MeSH)</term>
<term>Analyse de séquence d'ARN (MeSH)</term>
<term>Arbres (MeSH)</term>
<term>Australie (MeSH)</term>
<term>Basidiomycota (physiologie)</term>
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<term>Feuilles de plante (immunologie)</term>
<term>Feuilles de plante (microbiologie)</term>
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<term>Maladies des plantes (microbiologie)</term>
<term>Melaleuca (génétique)</term>
<term>Melaleuca (immunologie)</term>
<term>Melaleuca (microbiologie)</term>
<term>Modèles biologiques (MeSH)</term>
<term>Régulation de l'expression des gènes végétaux (MeSH)</term>
<term>Résistance à la maladie (génétique)</term>
<term>Transcriptome (MeSH)</term>
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<term>Résistance à la maladie</term>
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<term>Melaleuca</term>
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<div type="abstract" xml:lang="en">Plants have developed complex defense mechanisms to protect themselves against pathogens. A wide-host-range fungus, Austropuccinia psidii, which has caused severe damage to ecosystems and plantations worldwide, is a major threat to Australian ecosystems dominated by members of the family Myrtaceae. In particular, the east coast wetland foundation tree species Melaleuca quinquenervia, appears to be variably susceptible to this pathogen. Understanding the molecular basis of host resistance would enable better management of this rust disease. We identified resistant and susceptible individuals of M. quinquenervia and explored their differential gene expression in order to discover the molecular basis of resistance against A. psidii. Rust screening of germplasm showed a varying degree of response, with fully resistant to highly susceptible individuals. We used transcriptome profiling in samples collected before and at 5 days postinoculation (dpi). Differential gene expression analysis showed that numerous defense-related genes were induced in susceptible plants at 5 dpi. Mapping reads against the A. psidii genome showed that only susceptible plants contained fungal-derived transcripts. Resistant plants exhibited an overexpression of candidate A. psidii resistance-related genes such as receptor-like kinases, nucleotide-binding site leucine-rich repeat proteins, glutathione S-transferases, WRKY transcriptional regulators, and pathogenesis-related proteins. We identified large differences in the expression of defense-related genes among resistant individuals.</div>
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<AbstractText>Plants have developed complex defense mechanisms to protect themselves against pathogens. A wide-host-range fungus, Austropuccinia psidii, which has caused severe damage to ecosystems and plantations worldwide, is a major threat to Australian ecosystems dominated by members of the family Myrtaceae. In particular, the east coast wetland foundation tree species Melaleuca quinquenervia, appears to be variably susceptible to this pathogen. Understanding the molecular basis of host resistance would enable better management of this rust disease. We identified resistant and susceptible individuals of M. quinquenervia and explored their differential gene expression in order to discover the molecular basis of resistance against A. psidii. Rust screening of germplasm showed a varying degree of response, with fully resistant to highly susceptible individuals. We used transcriptome profiling in samples collected before and at 5 days postinoculation (dpi). Differential gene expression analysis showed that numerous defense-related genes were induced in susceptible plants at 5 dpi. Mapping reads against the A. psidii genome showed that only susceptible plants contained fungal-derived transcripts. Resistant plants exhibited an overexpression of candidate A. psidii resistance-related genes such as receptor-like kinases, nucleotide-binding site leucine-rich repeat proteins, glutathione S-transferases, WRKY transcriptional regulators, and pathogenesis-related proteins. We identified large differences in the expression of defense-related genes among resistant individuals.</AbstractText>
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<Affiliation>First, fifth, and sixth authors: Research School of Biology, The Australian National University, 116 Daley Road, Canberra 2601, ACT, Australia; second and third authors: The John Curtin School of Medical Research, The Australian National University, 131 Garran Road, Canberra 2601, ACT, Australia; and fourth author: Plant Breeding Institute, The University of Sydney, 107 Cobbitty Road, Cobbitty 2570, NSW, Australia.</Affiliation>
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<LastName>Foley</LastName>
<ForeName>William J</ForeName>
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<AffiliationInfo>
<Affiliation>First, fifth, and sixth authors: Research School of Biology, The Australian National University, 116 Daley Road, Canberra 2601, ACT, Australia; second and third authors: The John Curtin School of Medical Research, The Australian National University, 131 Garran Road, Canberra 2601, ACT, Australia; and fourth author: Plant Breeding Institute, The University of Sydney, 107 Cobbitty Road, Cobbitty 2570, NSW, Australia.</Affiliation>
</AffiliationInfo>
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<LastName>Külheim</LastName>
<ForeName>Carsten</ForeName>
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<AffiliationInfo>
<Affiliation>First, fifth, and sixth authors: Research School of Biology, The Australian National University, 116 Daley Road, Canberra 2601, ACT, Australia; second and third authors: The John Curtin School of Medical Research, The Australian National University, 131 Garran Road, Canberra 2601, ACT, Australia; and fourth author: Plant Breeding Institute, The University of Sydney, 107 Cobbitty Road, Cobbitty 2570, NSW, Australia.</Affiliation>
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<Month>02</Month>
<Day>14</Day>
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<DescriptorName UI="D017753" MajorTopicYN="N">Ecosystem</DescriptorName>
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<DescriptorName UI="D020869" MajorTopicYN="N">Gene Expression Profiling</DescriptorName>
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<DescriptorName UI="D018506" MajorTopicYN="N">Gene Expression Regulation, Plant</DescriptorName>
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<DescriptorName UI="D031650" MajorTopicYN="N">Melaleuca</DescriptorName>
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<QualifierName UI="Q000276" MajorTopicYN="N">immunology</QualifierName>
<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
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<DescriptorName UI="D010935" MajorTopicYN="N">Plant Diseases</DescriptorName>
<QualifierName UI="Q000276" MajorTopicYN="Y">immunology</QualifierName>
<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000276" MajorTopicYN="N">immunology</QualifierName>
<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D017423" MajorTopicYN="N">Sequence Analysis, RNA</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D059467" MajorTopicYN="Y">Transcriptome</DescriptorName>
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<MeshHeading>
<DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName>
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<Keyword MajorTopicYN="Y">RNA-Seq</Keyword>
<Keyword MajorTopicYN="Y">plant defense</Keyword>
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<Month>11</Month>
<Day>15</Day>
<Hour>6</Hour>
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<Year>2018</Year>
<Month>6</Month>
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<Hour>6</Hour>
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<ArticleId IdType="doi">10.1094/PHYTO-09-17-0307-R</ArticleId>
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<li>Australie</li>
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<name sortKey="Hsieh, Ji Fan" sort="Hsieh, Ji Fan" uniqKey="Hsieh J" first="Ji-Fan" last="Hsieh">Ji-Fan Hsieh</name>
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<name sortKey="Chuah, Aaron" sort="Chuah, Aaron" uniqKey="Chuah A" first="Aaron" last="Chuah">Aaron Chuah</name>
<name sortKey="Foley, William J" sort="Foley, William J" uniqKey="Foley W" first="William J" last="Foley">William J. Foley</name>
<name sortKey="Kulheim, Carsten" sort="Kulheim, Carsten" uniqKey="Kulheim C" first="Carsten" last="Külheim">Carsten Külheim</name>
<name sortKey="Patel, Hardip R" sort="Patel, Hardip R" uniqKey="Patel H" first="Hardip R" last="Patel">Hardip R. Patel</name>
<name sortKey="Sandhu, Karanjeet S" sort="Sandhu, Karanjeet S" uniqKey="Sandhu K" first="Karanjeet S" last="Sandhu">Karanjeet S. Sandhu</name>
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