The wound-, pathogen-, and ultraviolet B-responsive MYB134 gene encodes an R2R3 MYB transcription factor that regulates proanthocyanidin synthesis in poplar.
Identifieur interne : 003452 ( Main/Exploration ); précédent : 003451; suivant : 003453The wound-, pathogen-, and ultraviolet B-responsive MYB134 gene encodes an R2R3 MYB transcription factor that regulates proanthocyanidin synthesis in poplar.
Auteurs : Robin D. Mellway [Canada] ; Lan T. Tran ; Michael B. Prouse ; Malcolm M. Campbell ; C Peter ConstabelSource :
- Plant physiology [ 0032-0889 ] ; 2009.
Descripteurs français
- KwdFr :
- Analyse de profil d'expression de gènes (MeSH), Basidiomycota (physiologie), Chromatographie en phase liquide à haute performance (MeSH), Données de séquences moléculaires (MeSH), Facteurs de transcription (composition chimique), Facteurs de transcription (génétique), Facteurs de transcription (métabolisme), Flavonoïdes (métabolisme), Gènes de plante (MeSH), Liaison aux protéines (MeSH), Phylogenèse (MeSH), Phénols (métabolisme), Populus (cytologie), Populus (effets des radiations), Populus (génétique), Populus (microbiologie), Proanthocyanidines (biosynthèse), Protéines végétales (composition chimique), Protéines végétales (génétique), Protéines végétales (métabolisme), Rayons ultraviolets (MeSH), Régions promotrices (génétique) (génétique), Régulation de l'expression des gènes végétaux (effets des radiations), Stress physiologique (effets des radiations), Séquence d'acides aminés (MeSH), Séquence nucléotidique (MeSH), Voies et réseaux métaboliques (effets des radiations).
- MESH :
- biosynthèse : Proanthocyanidines.
- composition chimique : Facteurs de transcription, Protéines végétales.
- cytologie : Populus.
- effets des radiations : Populus, Régulation de l'expression des gènes végétaux, Stress physiologique, Voies et réseaux métaboliques.
- génétique : Facteurs de transcription, Populus, Protéines végétales, Régions promotrices (génétique).
- microbiologie : Populus.
- métabolisme : Facteurs de transcription, Flavonoïdes, Phénols, Protéines végétales.
- physiologie : Basidiomycota.
- Analyse de profil d'expression de gènes, Chromatographie en phase liquide à haute performance, Données de séquences moléculaires, Gènes de plante, Liaison aux protéines, Phylogenèse, Rayons ultraviolets, Séquence d'acides aminés, Séquence nucléotidique.
English descriptors
- KwdEn :
- Amino Acid Sequence (MeSH), Base Sequence (MeSH), Basidiomycota (physiology), Chromatography, High Pressure Liquid (MeSH), Flavonoids (metabolism), Gene Expression Profiling (MeSH), Gene Expression Regulation, Plant (radiation effects), Genes, Plant (MeSH), Metabolic Networks and Pathways (radiation effects), Molecular Sequence Data (MeSH), Phenols (metabolism), Phylogeny (MeSH), Plant Proteins (chemistry), Plant Proteins (genetics), Plant Proteins (metabolism), Populus (cytology), Populus (genetics), Populus (microbiology), Populus (radiation effects), Proanthocyanidins (biosynthesis), Promoter Regions, Genetic (genetics), Protein Binding (MeSH), Stress, Physiological (radiation effects), Transcription Factors (chemistry), Transcription Factors (genetics), Transcription Factors (metabolism), Ultraviolet Rays (MeSH).
- MESH :
- chemical , biosynthesis : Proanthocyanidins.
- chemical , chemistry : Plant Proteins, Transcription Factors.
- chemical , genetics : Plant Proteins, Transcription Factors.
- chemical , metabolism : Flavonoids, Phenols, Plant Proteins, Transcription Factors.
- cytology : Populus.
- genetics : Populus, Promoter Regions, Genetic.
- microbiology : Populus.
- physiology : Basidiomycota.
- radiation effects : Gene Expression Regulation, Plant, Metabolic Networks and Pathways, Populus, Stress, Physiological.
- Amino Acid Sequence, Base Sequence, Chromatography, High Pressure Liquid, Gene Expression Profiling, Genes, Plant, Molecular Sequence Data, Phylogeny, Protein Binding, Ultraviolet Rays.
Abstract
In poplar (Populus spp.), the major defense phenolics produced in leaves are the flavonoid-derived proanthocyanidins (PAs) and the salicin-based phenolic glycosides. Transcriptional activation of PA biosynthetic genes leading to PA accumulation in leaves occurs following herbivore damage and mechanical wounding as well as infection by the fungal biotroph Melampsora medusae. In this study, we have identified a poplar R2R3 MYB transcription factor gene, MYB134, that exhibits close sequence similarity to the Arabidopsis (Arabidopsis thaliana) PA regulator TRANSPARENT TESTA2 and that is coinduced with PA biosynthetic genes following mechanical wounding, M. medusae infection, and exposure to elevated ultraviolet B light. Overexpression of MYB134 in poplar resulted in transcriptional activation of the full PA biosynthetic pathway and a significant plant-wide increase in PA levels, and electrophoretic mobility shift assays showed that recombinant MYB134 protein is able to bind to promoter regions of PA pathway genes. MYB134-overexpressing plants exhibited a concomitant reduction in phenolic glycoside concentrations and other minor alterations to levels of small phenylpropanoid metabolites. Our data provide insight into the regulatory mechanisms controlling stress-induced PA metabolism in poplar, and the identification of a regulator of stress-responsive PA biosynthesis constitutes a valuable tool for manipulating PA metabolism in poplar and investigating the biological functions of PAs in resistance to biotic and abiotic stresses.
DOI: 10.1104/pp.109.139071
PubMed: 19395405
PubMed Central: PMC2689947
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Basidiomycota</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Basidiomycota</term></keywords><keywords scheme="MESH" qualifier="radiation effects" xml:lang="en"><term>Gene Expression Regulation, Plant</term><term>Metabolic Networks and Pathways</term><term>Populus</term><term>Stress, Physiological</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Amino Acid Sequence</term><term>Base Sequence</term><term>Chromatography, High Pressure Liquid</term><term>Gene Expression Profiling</term><term>Genes, Plant</term><term>Molecular Sequence Data</term><term>Phylogeny</term><term>Protein Binding</term><term>Ultraviolet Rays</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Analyse de profil d'expression de gènes</term><term>Chromatographie en phase liquide à haute performance</term><term>Données de séquences moléculaires</term><term>Gènes de plante</term><term>Liaison aux protéines</term><term>Phylogenèse</term><term>Rayons ultraviolets</term><term>Séquence d'acides aminés</term><term>Séquence nucléotidique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In poplar (Populus spp.), the major defense phenolics produced in leaves are the flavonoid-derived proanthocyanidins (PAs) and the salicin-based phenolic glycosides. Transcriptional activation of PA biosynthetic genes leading to PA accumulation in leaves occurs following herbivore damage and mechanical wounding as well as infection by the fungal biotroph Melampsora medusae. In this study, we have identified a poplar R2R3 MYB transcription factor gene, MYB134, that exhibits close sequence similarity to the Arabidopsis (Arabidopsis thaliana) PA regulator TRANSPARENT TESTA2 and that is coinduced with PA biosynthetic genes following mechanical wounding, M. medusae infection, and exposure to elevated ultraviolet B light. Overexpression of MYB134 in poplar resulted in transcriptional activation of the full PA biosynthetic pathway and a significant plant-wide increase in PA levels, and electrophoretic mobility shift assays showed that recombinant MYB134 protein is able to bind to promoter regions of PA pathway genes. MYB134-overexpressing plants exhibited a concomitant reduction in phenolic glycoside concentrations and other minor alterations to levels of small phenylpropanoid metabolites. Our data provide insight into the regulatory mechanisms controlling stress-induced PA metabolism in poplar, and the identification of a regulator of stress-responsive PA biosynthesis constitutes a valuable tool for manipulating PA metabolism in poplar and investigating the biological functions of PAs in resistance to biotic and abiotic stresses.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">19395405</PMID><DateCompleted><Year>2009</Year><Month>08</Month><Day>03</Day></DateCompleted><DateRevised><Year>2019</Year><Month>01</Month><Day>08</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0032-0889</ISSN><JournalIssue CitedMedium="Print"><Volume>150</Volume><Issue>2</Issue><PubDate><Year>2009</Year><Month>Jun</Month></PubDate></JournalIssue><Title>Plant physiology</Title><ISOAbbreviation>Plant Physiol</ISOAbbreviation></Journal><ArticleTitle>The wound-, pathogen-, and ultraviolet B-responsive MYB134 gene encodes an R2R3 MYB transcription factor that regulates proanthocyanidin synthesis in poplar.</ArticleTitle><Pagination><MedlinePgn>924-41</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1104/pp.109.139071</ELocationID><Abstract><AbstractText>In poplar (Populus spp.), the major defense phenolics produced in leaves are the flavonoid-derived proanthocyanidins (PAs) and the salicin-based phenolic glycosides. Transcriptional activation of PA biosynthetic genes leading to PA accumulation in leaves occurs following herbivore damage and mechanical wounding as well as infection by the fungal biotroph Melampsora medusae. In this study, we have identified a poplar R2R3 MYB transcription factor gene, MYB134, that exhibits close sequence similarity to the Arabidopsis (Arabidopsis thaliana) PA regulator TRANSPARENT TESTA2 and that is coinduced with PA biosynthetic genes following mechanical wounding, M. medusae infection, and exposure to elevated ultraviolet B light. Overexpression of MYB134 in poplar resulted in transcriptional activation of the full PA biosynthetic pathway and a significant plant-wide increase in PA levels, and electrophoretic mobility shift assays showed that recombinant MYB134 protein is able to bind to promoter regions of PA pathway genes. MYB134-overexpressing plants exhibited a concomitant reduction in phenolic glycoside concentrations and other minor alterations to levels of small phenylpropanoid metabolites. Our data provide insight into the regulatory mechanisms controlling stress-induced PA metabolism in poplar, and the identification of a regulator of stress-responsive PA biosynthesis constitutes a valuable tool for manipulating PA metabolism in poplar and investigating the biological functions of PAs in resistance to biotic and abiotic stresses.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Mellway</LastName><ForeName>Robin D</ForeName><Initials>RD</Initials><AffiliationInfo><Affiliation>Centre for Forest Biology and Department of Biology, University of Victoria, Victoria, British Columbia, Canada V8W 3N5.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Tran</LastName><ForeName>Lan T</ForeName><Initials>LT</Initials></Author><Author ValidYN="Y"><LastName>Prouse</LastName><ForeName>Michael B</ForeName><Initials>MB</Initials></Author><Author ValidYN="Y"><LastName>Campbell</LastName><ForeName>Malcolm M</ForeName><Initials>MM</Initials></Author><Author ValidYN="Y"><LastName>Constabel</LastName><ForeName>C Peter</ForeName><Initials>CP</Initials></Author></AuthorList><Language>eng</Language><DataBankList CompleteYN="Y"><DataBank><DataBankName>GENBANK</DataBankName><AccessionNumberList><AccessionNumber>FJ573150</AccessionNumber><AccessionNumber>FJ573151</AccessionNumber><AccessionNumber>FJ573152</AccessionNumber><AccessionNumber>FJ588548</AccessionNumber></AccessionNumberList></DataBank></DataBankList><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2009</Year><Month>04</Month><Day>24</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Plant Physiol</MedlineTA><NlmUniqueID>0401224</NlmUniqueID><ISSNLinking>0032-0889</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D005419">Flavonoids</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D010636">Phenols</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D010940">Plant Proteins</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D044945">Proanthocyanidins</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D014157">Transcription Factors</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><CommentsCorrectionsList><CommentsCorrections RefType="CommentIn"><RefSource>Plant Signal Behav. 2009 Aug;4(8):790-2</RefSource><PMID Version="1">19820325</PMID></CommentsCorrections></CommentsCorrectionsList><MeshHeadingList><MeshHeading><DescriptorName UI="D000595" MajorTopicYN="N">Amino Acid Sequence</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D001483" MajorTopicYN="N">Base Sequence</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D001487" MajorTopicYN="N">Basidiomycota</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D002851" MajorTopicYN="N">Chromatography, High Pressure Liquid</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D005419" MajorTopicYN="N">Flavonoids</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D020869" MajorTopicYN="N">Gene Expression Profiling</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018506" MajorTopicYN="N">Gene Expression Regulation, Plant</DescriptorName><QualifierName UI="Q000528" MajorTopicYN="N">radiation effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D017343" MajorTopicYN="N">Genes, Plant</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D053858" MajorTopicYN="N">Metabolic Networks and Pathways</DescriptorName><QualifierName UI="Q000528" MajorTopicYN="N">radiation effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D008969" MajorTopicYN="N">Molecular Sequence Data</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010636" MajorTopicYN="N">Phenols</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010802" MajorTopicYN="N">Phylogeny</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010940" MajorTopicYN="N">Plant Proteins</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000235" MajorTopicYN="Y">genetics</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000166" MajorTopicYN="N">cytology</QualifierName><QualifierName UI="Q000235" MajorTopicYN="Y">genetics</QualifierName><QualifierName UI="Q000382" MajorTopicYN="Y">microbiology</QualifierName><QualifierName UI="Q000528" MajorTopicYN="N">radiation effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D044945" MajorTopicYN="N">Proanthocyanidins</DescriptorName><QualifierName UI="Q000096" MajorTopicYN="Y">biosynthesis</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D011401" MajorTopicYN="N">Promoter Regions, Genetic</DescriptorName><QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D011485" MajorTopicYN="N">Protein Binding</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013312" MajorTopicYN="N">Stress, Physiological</DescriptorName><QualifierName UI="Q000528" MajorTopicYN="N">radiation effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014157" MajorTopicYN="N">Transcription Factors</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000235" MajorTopicYN="Y">genetics</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014466" MajorTopicYN="Y">Ultraviolet Rays</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2009</Year><Month>4</Month><Day>28</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2009</Year><Month>4</Month><Day>28</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate 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Campbell</name><name sortKey="Constabel, C Peter" sort="Constabel, C Peter" uniqKey="Constabel C" first="C Peter" last="Constabel">C Peter Constabel</name><name sortKey="Prouse, Michael B" sort="Prouse, Michael B" uniqKey="Prouse M" first="Michael B" last="Prouse">Michael B. Prouse</name><name sortKey="Tran, Lan T" sort="Tran, Lan T" uniqKey="Tran L" first="Lan T" last="Tran">Lan T. Tran</name></noCountry><country name="Canada"><noRegion><name sortKey="Mellway, Robin D" sort="Mellway, Robin D" uniqKey="Mellway R" first="Robin D" last="Mellway">Robin D. Mellway</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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