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The transcription factor MYB115 contributes to the regulation of proanthocyanidin biosynthesis and enhances fungal resistance in poplar.

Identifieur interne : 001151 ( Main/Exploration ); précédent : 001150; suivant : 001152

The transcription factor MYB115 contributes to the regulation of proanthocyanidin biosynthesis and enhances fungal resistance in poplar.

Auteurs : Lijun Wang [République populaire de Chine] ; Lingyu Ran [République populaire de Chine] ; Yisu Hou [République populaire de Chine] ; Qiaoyan Tian [République populaire de Chine] ; Chaofeng Li [République populaire de Chine] ; Rui Liu [République populaire de Chine] ; Di Fan [République populaire de Chine] ; Keming Luo [République populaire de Chine]

Source :

RBID : pubmed:28444797

Descripteurs français

English descriptors

Abstract

Proanthocyanidins (PAs) are major defense phenolic compounds in the leaves of poplar (Populus spp.) in response to abiotic and biotic stresses. Transcriptional regulation of PA biosynthetic genes by the MYB-basic helix-loop-helix (bHLH)-WD40 complexes in poplar is not still fully understood. Here, an Arabidopsis TT2-like gene MYB115 was isolated from Populus tomentosa and characterized by various molecular, genetic and biochemical approaches. MYB115 restored PA productions in the seed coat of the Arabidopsis tt2 mutant. Overexpression of MYB115 in poplar activated expression of PA biosynthetic genes, resulting in a significant increase in PA concentrations. By contrast, the CRISPR/Cas9-generated myb115 mutant exhibited reduced PA content and decreased expression of PA biosynthetic genes. MYB115 directly activated the promoters of PA-specific structural genes. MYB115 interacted with poplar TT8. Coexpression of MYB115, TT8 and poplar TTG1 significantly enhanced the expression of ANR1 and LAR3. Additionally, transgenic plants overexpressing MYB115 had increased resistance to the fungal pathogen Dothiorella gregaria, whereas myb115 mutant exhibited greater sensitivity compared with wild-type plants. Our data provide insight into the regulatory mechanisms controlling PA biosynthesis by MYB115 in poplar, which could be effectively employed for metabolic engineering of PAs to improve resistance to fungal pathogens.

DOI: 10.1111/nph.14569
PubMed: 28444797


Affiliations:


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<term>Amino Acid Sequence (MeSH)</term>
<term>Arabidopsis (genetics)</term>
<term>Arabidopsis (metabolism)</term>
<term>Biosynthetic Pathways (MeSH)</term>
<term>Disease Resistance (genetics)</term>
<term>Plant Proteins (genetics)</term>
<term>Plant Proteins (metabolism)</term>
<term>Plant Proteins (physiology)</term>
<term>Populus (genetics)</term>
<term>Populus (metabolism)</term>
<term>Populus (microbiology)</term>
<term>Proanthocyanidins (biosynthesis)</term>
<term>Sequence Alignment (MeSH)</term>
<term>Sequence Analysis, Protein (MeSH)</term>
<term>Stress, Physiological (MeSH)</term>
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<term>Alignement de séquences (MeSH)</term>
<term>Analyse de séquence de protéine (MeSH)</term>
<term>Arabidopsis (génétique)</term>
<term>Arabidopsis (métabolisme)</term>
<term>Populus (génétique)</term>
<term>Populus (microbiologie)</term>
<term>Populus (métabolisme)</term>
<term>Proanthocyanidines (biosynthèse)</term>
<term>Protéines végétales (génétique)</term>
<term>Protéines végétales (métabolisme)</term>
<term>Protéines végétales (physiologie)</term>
<term>Résistance à la maladie (génétique)</term>
<term>Stress physiologique (MeSH)</term>
<term>Séquence d'acides aminés (MeSH)</term>
<term>Voies de biosynthèse (MeSH)</term>
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<term>Proanthocyanidins</term>
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<term>Plant Proteins</term>
</keywords>
<keywords scheme="MESH" qualifier="biosynthèse" xml:lang="fr">
<term>Proanthocyanidines</term>
</keywords>
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<term>Arabidopsis</term>
<term>Disease Resistance</term>
<term>Populus</term>
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<term>Arabidopsis</term>
<term>Populus</term>
<term>Protéines végétales</term>
<term>Résistance à la maladie</term>
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<term>Arabidopsis</term>
<term>Plant Proteins</term>
<term>Populus</term>
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<term>Populus</term>
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<term>Populus</term>
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<term>Arabidopsis</term>
<term>Populus</term>
<term>Protéines végétales</term>
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<term>Analyse de séquence de protéine</term>
<term>Stress physiologique</term>
<term>Séquence d'acides aminés</term>
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<div type="abstract" xml:lang="en">Proanthocyanidins (PAs) are major defense phenolic compounds in the leaves of poplar (Populus spp.) in response to abiotic and biotic stresses. Transcriptional regulation of PA biosynthetic genes by the MYB-basic helix-loop-helix (bHLH)-WD40 complexes in poplar is not still fully understood. Here, an Arabidopsis TT2-like gene MYB115 was isolated from Populus tomentosa and characterized by various molecular, genetic and biochemical approaches. MYB115 restored PA productions in the seed coat of the Arabidopsis tt2 mutant. Overexpression of MYB115 in poplar activated expression of PA biosynthetic genes, resulting in a significant increase in PA concentrations. By contrast, the CRISPR/Cas9-generated myb115 mutant exhibited reduced PA content and decreased expression of PA biosynthetic genes. MYB115 directly activated the promoters of PA-specific structural genes. MYB115 interacted with poplar TT8. Coexpression of MYB115, TT8 and poplar TTG1 significantly enhanced the expression of ANR1 and LAR3. Additionally, transgenic plants overexpressing MYB115 had increased resistance to the fungal pathogen Dothiorella gregaria, whereas myb115 mutant exhibited greater sensitivity compared with wild-type plants. Our data provide insight into the regulatory mechanisms controlling PA biosynthesis by MYB115 in poplar, which could be effectively employed for metabolic engineering of PAs to improve resistance to fungal pathogens.</div>
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<AbstractText>Proanthocyanidins (PAs) are major defense phenolic compounds in the leaves of poplar (Populus spp.) in response to abiotic and biotic stresses. Transcriptional regulation of PA biosynthetic genes by the MYB-basic helix-loop-helix (bHLH)-WD40 complexes in poplar is not still fully understood. Here, an Arabidopsis TT2-like gene MYB115 was isolated from Populus tomentosa and characterized by various molecular, genetic and biochemical approaches. MYB115 restored PA productions in the seed coat of the Arabidopsis tt2 mutant. Overexpression of MYB115 in poplar activated expression of PA biosynthetic genes, resulting in a significant increase in PA concentrations. By contrast, the CRISPR/Cas9-generated myb115 mutant exhibited reduced PA content and decreased expression of PA biosynthetic genes. MYB115 directly activated the promoters of PA-specific structural genes. MYB115 interacted with poplar TT8. Coexpression of MYB115, TT8 and poplar TTG1 significantly enhanced the expression of ANR1 and LAR3. Additionally, transgenic plants overexpressing MYB115 had increased resistance to the fungal pathogen Dothiorella gregaria, whereas myb115 mutant exhibited greater sensitivity compared with wild-type plants. Our data provide insight into the regulatory mechanisms controlling PA biosynthesis by MYB115 in poplar, which could be effectively employed for metabolic engineering of PAs to improve resistance to fungal pathogens.</AbstractText>
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<Year>2017</Year>
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<Day>26</Day>
</ArticleDate>
</Article>
<MedlineJournalInfo>
<Country>England</Country>
<MedlineTA>New Phytol</MedlineTA>
<NlmUniqueID>9882884</NlmUniqueID>
<ISSNLinking>0028-646X</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D010940">Plant Proteins</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D044945">Proanthocyanidins</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>18206-61-6</RegistryNumber>
<NameOfSubstance UI="C013221">proanthocyanidin</NameOfSubstance>
</Chemical>
</ChemicalList>
<CitationSubset>IM</CitationSubset>
<MeshHeadingList>
<MeshHeading>
<DescriptorName UI="D000595" MajorTopicYN="N">Amino Acid Sequence</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D017360" MajorTopicYN="N">Arabidopsis</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D053898" MajorTopicYN="N">Biosynthetic Pathways</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D060467" MajorTopicYN="N">Disease Resistance</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010940" MajorTopicYN="N">Plant Proteins</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
<QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D044945" MajorTopicYN="N">Proanthocyanidins</DescriptorName>
<QualifierName UI="Q000096" MajorTopicYN="Y">biosynthesis</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D016415" MajorTopicYN="N">Sequence Alignment</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D020539" MajorTopicYN="N">Sequence Analysis, Protein</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D013312" MajorTopicYN="N">Stress, Physiological</DescriptorName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM">
<Keyword MajorTopicYN="N">Populus </Keyword>
<Keyword MajorTopicYN="N">CRISPR/Cas9</Keyword>
<Keyword MajorTopicYN="N">R2R3 MYB transcription factor</Keyword>
<Keyword MajorTopicYN="N">fungal pathogen</Keyword>
<Keyword MajorTopicYN="N">proanthocyanidin</Keyword>
</KeywordList>
</MedlineCitation>
<PubmedData>
<History>
<PubMedPubDate PubStatus="received">
<Year>2017</Year>
<Month>02</Month>
<Day>01</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
<Year>2017</Year>
<Month>03</Month>
<Day>06</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="pubmed">
<Year>2017</Year>
<Month>4</Month>
<Day>27</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2018</Year>
<Month>5</Month>
<Day>2</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez">
<Year>2017</Year>
<Month>4</Month>
<Day>27</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">28444797</ArticleId>
<ArticleId IdType="doi">10.1111/nph.14569</ArticleId>
</ArticleIdList>
</PubmedData>
</pubmed>
<affiliations>
<list>
<country>
<li>République populaire de Chine</li>
</country>
</list>
<tree>
<country name="République populaire de Chine">
<noRegion>
<name sortKey="Wang, Lijun" sort="Wang, Lijun" uniqKey="Wang L" first="Lijun" last="Wang">Lijun Wang</name>
</noRegion>
<name sortKey="Fan, Di" sort="Fan, Di" uniqKey="Fan D" first="Di" last="Fan">Di Fan</name>
<name sortKey="Hou, Yisu" sort="Hou, Yisu" uniqKey="Hou Y" first="Yisu" last="Hou">Yisu Hou</name>
<name sortKey="Li, Chaofeng" sort="Li, Chaofeng" uniqKey="Li C" first="Chaofeng" last="Li">Chaofeng Li</name>
<name sortKey="Liu, Rui" sort="Liu, Rui" uniqKey="Liu R" first="Rui" last="Liu">Rui Liu</name>
<name sortKey="Luo, Keming" sort="Luo, Keming" uniqKey="Luo K" first="Keming" last="Luo">Keming Luo</name>
<name sortKey="Ran, Lingyu" sort="Ran, Lingyu" uniqKey="Ran L" first="Lingyu" last="Ran">Lingyu Ran</name>
<name sortKey="Tian, Qiaoyan" sort="Tian, Qiaoyan" uniqKey="Tian Q" first="Qiaoyan" last="Tian">Qiaoyan Tian</name>
</country>
</tree>
</affiliations>
</record>

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