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R2R3-MYB transcription factor MYB6 promotes anthocyanin and proanthocyanidin biosynthesis but inhibits secondary cell wall formation in Populus tomentosa.

Identifieur interne : 000745 ( Main/Exploration ); précédent : 000744; suivant : 000746

R2R3-MYB transcription factor MYB6 promotes anthocyanin and proanthocyanidin biosynthesis but inhibits secondary cell wall formation in Populus tomentosa.

Auteurs : Lijun Wang [République populaire de Chine] ; Wanxiang Lu [République populaire de Chine] ; Lingyu Ran [République populaire de Chine] ; Liwen Dou [République populaire de Chine] ; Shu Yao [République populaire de Chine] ; Jian Hu [République populaire de Chine] ; Di Fan [République populaire de Chine] ; Chaofeng Li [République populaire de Chine] ; Keming Luo [République populaire de Chine]

Source :

RBID : pubmed:31021017

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English descriptors

Abstract

The secondary cell wall is an important carbon sink in higher plants and its biosynthesis requires coordination of metabolic fluxes in the phenylpropanoid pathway. In Arabidopsis (Arabidopsis thaliana), MYB75 and the KNOX transcription factor KNAT7 form functional complexes to regulate secondary cell wall formation in the inflorescence stem. However, the molecular mechanism by which these transcription factors control different branches of the phenylpropanoid pathway remains poorly understood in woody species. We isolated an R2R3-MYB transcription factor MYB6 from Populus tomentosa and determined that it was expressed predominately in young leaves. Overexpression of MYB6 in transgenic poplar upregulated flavonoid biosynthetic gene expression, resulting in significantly increased accumulation of anthocyanin and proanthocyanidins. MYB6-overexpression plants showed reduced secondary cell wall deposition, accompanied by repressed expression of secondary cell wall biosynthetic genes. We further showed that MYB6 interacted physically with KNAT7 and formed functional complexes that acted to repress secondary cell wall development in poplar and Arabidopsis. The results provide an insight into the transcriptional mechanisms involved in the regulation of the metabolic fluxes between the flavonoid and lignin biosynthetic pathways in poplar.

DOI: 10.1111/tpj.14364
PubMed: 31021017


Affiliations:


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Le document en format XML

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<term>Gene Expression Regulation, Plant (MeSH)</term>
<term>Plant Proteins (metabolism)</term>
<term>Populus (metabolism)</term>
<term>Proanthocyanidins (metabolism)</term>
<term>Transcription Factors (genetics)</term>
<term>Transcription Factors (metabolism)</term>
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<term>Anthocyanes (métabolisme)</term>
<term>Facteurs de transcription (génétique)</term>
<term>Facteurs de transcription (métabolisme)</term>
<term>Paroi cellulaire (métabolisme)</term>
<term>Populus (métabolisme)</term>
<term>Proanthocyanidines (métabolisme)</term>
<term>Protéines végétales (métabolisme)</term>
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<term>Transcription Factors</term>
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<div type="abstract" xml:lang="en">The secondary cell wall is an important carbon sink in higher plants and its biosynthesis requires coordination of metabolic fluxes in the phenylpropanoid pathway. In Arabidopsis (Arabidopsis thaliana), MYB75 and the KNOX transcription factor KNAT7 form functional complexes to regulate secondary cell wall formation in the inflorescence stem. However, the molecular mechanism by which these transcription factors control different branches of the phenylpropanoid pathway remains poorly understood in woody species. We isolated an R2R3-MYB transcription factor MYB6 from Populus tomentosa and determined that it was expressed predominately in young leaves. Overexpression of MYB6 in transgenic poplar upregulated flavonoid biosynthetic gene expression, resulting in significantly increased accumulation of anthocyanin and proanthocyanidins. MYB6-overexpression plants showed reduced secondary cell wall deposition, accompanied by repressed expression of secondary cell wall biosynthetic genes. We further showed that MYB6 interacted physically with KNAT7 and formed functional complexes that acted to repress secondary cell wall development in poplar and Arabidopsis. The results provide an insight into the transcriptional mechanisms involved in the regulation of the metabolic fluxes between the flavonoid and lignin biosynthetic pathways in poplar.</div>
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</Author>
<Author ValidYN="Y">
<LastName>Luo</LastName>
<ForeName>Keming</ForeName>
<Initials>K</Initials>
<Identifier Source="ORCID">0000-0002-1381-4308</Identifier>
<AffiliationInfo>
<Affiliation>Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715, China.</Affiliation>
</AffiliationInfo>
<AffiliationInfo>
<Affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Southwest University, Chongqing, 400715, China.</Affiliation>
</AffiliationInfo>
</Author>
</AuthorList>
<Language>eng</Language>
<DataBankList CompleteYN="Y">
<DataBank>
<DataBankName>GENBANK</DataBankName>
<AccessionNumberList>
<AccessionNumber>KF811025.1</AccessionNumber>
<AccessionNumber>KF811025</AccessionNumber>
<AccessionNumber>AED93980</AccessionNumber>
<AccessionNumber>AEE33419</AccessionNumber>
<AccessionNumber>AEE34503</AccessionNumber>
<AccessionNumber>AED91824</AccessionNumber>
<AccessionNumber>AEE29461</AccessionNumber>
<AccessionNumber>AEE36212</AccessionNumber>
<AccessionNumber>AEE84639</AccessionNumber>
<AccessionNumber>AFG28177</AccessionNumber>
<AccessionNumber>AAX51291</AccessionNumber>
<AccessionNumber>CAJ90831</AccessionNumber>
<AccessionNumber>ACK56131</AccessionNumber>
<AccessionNumber>CAJ42202</AccessionNumber>
<AccessionNumber>AAK09327</AccessionNumber>
<AccessionNumber>AAB67721</AccessionNumber>
<AccessionNumber>AGT02395</AccessionNumber>
<AccessionNumber>XP_002303999</AccessionNumber>
<AccessionNumber>XP_002309470</AccessionNumber>
<AccessionNumber>KF148676</AccessionNumber>
<AccessionNumber>XP_002308528</AccessionNumber>
<AccessionNumber>ACA33851</AccessionNumber>
<AccessionNumber>AAQ62540</AccessionNumber>
<AccessionNumber>ABD60280</AccessionNumber>
<AccessionNumber>AAY51377</AccessionNumber>
<AccessionNumber>AAF66728</AccessionNumber>
<AccessionNumber>NP_001050341</AccessionNumber>
<AccessionNumber>ADV03957</AccessionNumber>
<AccessionNumber>ACQ45201</AccessionNumber>
<AccessionNumber>CAE09057</AccessionNumber>
<AccessionNumber>CAA55725.1</AccessionNumber>
<AccessionNumber>XP_003601609</AccessionNumber>
<AccessionNumber>KEH32454.1</AccessionNumber>
<AccessionNumber>BAG12893.1</AccessionNumber>
<AccessionNumber>BAG12894.2</AccessionNumber>
<AccessionNumber>BAG12895.1</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>2019</Year>
<Month>05</Month>
<Day>30</Day>
</ArticleDate>
</Article>
<MedlineJournalInfo>
<Country>England</Country>
<MedlineTA>Plant J</MedlineTA>
<NlmUniqueID>9207397</NlmUniqueID>
<ISSNLinking>0960-7412</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D000872">Anthocyanins</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>
<MeshHeadingList>
<MeshHeading>
<DescriptorName UI="D000872" MajorTopicYN="N">Anthocyanins</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D002473" MajorTopicYN="N">Cell Wall</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D018506" MajorTopicYN="N">Gene Expression Regulation, Plant</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010940" MajorTopicYN="N">Plant Proteins</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D044945" MajorTopicYN="N">Proanthocyanidins</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D014157" MajorTopicYN="N">Transcription Factors</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM">
<Keyword MajorTopicYN="Y">Populus </Keyword>
<Keyword MajorTopicYN="Y">Anthocyanin</Keyword>
<Keyword MajorTopicYN="Y">KNAT7</Keyword>
<Keyword MajorTopicYN="Y">MYB transcription factor</Keyword>
<Keyword MajorTopicYN="Y">lignin</Keyword>
<Keyword MajorTopicYN="Y">proanthocyanidin</Keyword>
</KeywordList>
</MedlineCitation>
<PubmedData>
<History>
<PubMedPubDate PubStatus="received">
<Year>2018</Year>
<Month>12</Month>
<Day>01</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
<Year>2019</Year>
<Month>04</Month>
<Day>08</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="pubmed">
<Year>2019</Year>
<Month>4</Month>
<Day>26</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2020</Year>
<Month>6</Month>
<Day>9</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez">
<Year>2019</Year>
<Month>4</Month>
<Day>26</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">31021017</ArticleId>
<ArticleId IdType="doi">10.1111/tpj.14364</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="Dou, Liwen" sort="Dou, Liwen" uniqKey="Dou L" first="Liwen" last="Dou">Liwen Dou</name>
<name sortKey="Fan, Di" sort="Fan, Di" uniqKey="Fan D" first="Di" last="Fan">Di Fan</name>
<name sortKey="Fan, Di" sort="Fan, Di" uniqKey="Fan D" first="Di" last="Fan">Di Fan</name>
<name sortKey="Hu, Jian" sort="Hu, Jian" uniqKey="Hu J" first="Jian" last="Hu">Jian Hu</name>
<name sortKey="Li, Chaofeng" sort="Li, Chaofeng" uniqKey="Li C" first="Chaofeng" last="Li">Chaofeng Li</name>
<name sortKey="Lu, Wanxiang" sort="Lu, Wanxiang" uniqKey="Lu W" first="Wanxiang" last="Lu">Wanxiang Lu</name>
<name sortKey="Luo, Keming" sort="Luo, Keming" uniqKey="Luo K" first="Keming" last="Luo">Keming Luo</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="Yao, Shu" sort="Yao, Shu" uniqKey="Yao S" first="Shu" last="Yao">Shu Yao</name>
</country>
</tree>
</affiliations>
</record>

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