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PtoMYB170 positively regulates lignin deposition during wood formation in poplar and confers drought tolerance in transgenic Arabidopsis.

Identifieur interne : 001230 ( Main/Exploration ); précédent : 001229; suivant : 001231

PtoMYB170 positively regulates lignin deposition during wood formation in poplar and confers drought tolerance in transgenic Arabidopsis.

Auteurs : Changzheng Xu [République populaire de Chine] ; Xiaokang Fu [République populaire de Chine] ; Rui Liu [République populaire de Chine] ; Li Guo [République populaire de Chine] ; Lingyu Ran [République populaire de Chine] ; Chaofeng Li [République populaire de Chine] ; Qiaoyan Tian [République populaire de Chine] ; Bo Jiao [République populaire de Chine] ; Bangjun Wang [République populaire de Chine] ; Keming Luo [République populaire de Chine]

Source :

RBID : pubmed:28985414

Descripteurs français

English descriptors

Abstract

Wood formation is a complex developmental process under multi-level transcriptional control executed by a large set of transcription factors. However, only limited members have been characterized to be key regulators of lignin biosynthesis in poplar. Here we report the conserved and unique functions of PtoMYB170, a transcription factor identified from Populus tomentosa (Chinese white poplar), in lignin deposition and drought tolerance in comparison with its duplicate paralog PtoMYB216. PtoMYB170 is preferentially expressed in young leaves and xylem tissues. Overexpression of PtoMYB170 in transgenic poplar plants resulted in stronger lignification and more thickened secondary wall in xylem compared with wild-type plants, whereas the CRISPR/Cas9-generated mutation of PtoMYB170 weakened lignin deposition, thereby leading to a more flexible and collapsed xylem phenotype. Transient expression experiments demonstrated that PtoMYB170 specifically activated the expression of lignin biosynthetic genes, consistent with the function of PtoMYB216. However, GUS staining assays revealed that PtoMYB170 was specifically expressed in guard cells of transgenic Arabidopsis while PtoMYB216 was not. Heterologous expression of PtoMYB170 in Arabidopsis enhanced stomatal closure in the dark and resulted in drought tolerance of the transgenic plants through reduced water loss, indicating a diversified role from PtoMYB216. These results revealed the PtoMYB170-dependent positive transcriptional regulation on lignin deposition in poplar and its coordinated function in enhancing drought tolerance by promoting dark-induced stomatal closure.

DOI: 10.1093/treephys/tpx093
PubMed: 28985414


Affiliations:


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Le document en format XML

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<country xml:lang="fr">République populaire de Chine</country>
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<term>Arabidopsis (genetics)</term>
<term>Arabidopsis (metabolism)</term>
<term>Droughts (MeSH)</term>
<term>Gene Expression Profiling (MeSH)</term>
<term>Gene Expression Regulation, Plant (MeSH)</term>
<term>Lignin (metabolism)</term>
<term>Plants, Genetically Modified (genetics)</term>
<term>Plants, Genetically Modified (metabolism)</term>
<term>Populus (genetics)</term>
<term>Populus (metabolism)</term>
<term>Promoter Regions, Genetic (genetics)</term>
<term>Wood (metabolism)</term>
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<term>Analyse de profil d'expression de gènes (MeSH)</term>
<term>Arabidopsis (génétique)</term>
<term>Arabidopsis (métabolisme)</term>
<term>Bois (métabolisme)</term>
<term>Lignine (métabolisme)</term>
<term>Populus (génétique)</term>
<term>Populus (métabolisme)</term>
<term>Régions promotrices (génétique) (génétique)</term>
<term>Régulation de l'expression des gènes végétaux (MeSH)</term>
<term>Sécheresses (MeSH)</term>
<term>Végétaux génétiquement modifiés (génétique)</term>
<term>Végétaux génétiquement modifiés (métabolisme)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en">
<term>Lignin</term>
</keywords>
<keywords scheme="MESH" qualifier="genetics" xml:lang="en">
<term>Arabidopsis</term>
<term>Plants, Genetically Modified</term>
<term>Populus</term>
<term>Promoter Regions, Genetic</term>
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<term>Arabidopsis</term>
<term>Populus</term>
<term>Régions promotrices (génétique)</term>
<term>Végétaux génétiquement modifiés</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en">
<term>Arabidopsis</term>
<term>Plants, Genetically Modified</term>
<term>Populus</term>
<term>Wood</term>
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<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr">
<term>Arabidopsis</term>
<term>Bois</term>
<term>Lignine</term>
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<term>Végétaux génétiquement modifiés</term>
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<term>Gene Expression Profiling</term>
<term>Gene Expression Regulation, Plant</term>
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<keywords scheme="MESH" xml:lang="fr">
<term>Analyse de profil d'expression de gènes</term>
<term>Régulation de l'expression des gènes végétaux</term>
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<div type="abstract" xml:lang="en">Wood formation is a complex developmental process under multi-level transcriptional control executed by a large set of transcription factors. However, only limited members have been characterized to be key regulators of lignin biosynthesis in poplar. Here we report the conserved and unique functions of PtoMYB170, a transcription factor identified from Populus tomentosa (Chinese white poplar), in lignin deposition and drought tolerance in comparison with its duplicate paralog PtoMYB216. PtoMYB170 is preferentially expressed in young leaves and xylem tissues. Overexpression of PtoMYB170 in transgenic poplar plants resulted in stronger lignification and more thickened secondary wall in xylem compared with wild-type plants, whereas the CRISPR/Cas9-generated mutation of PtoMYB170 weakened lignin deposition, thereby leading to a more flexible and collapsed xylem phenotype. Transient expression experiments demonstrated that PtoMYB170 specifically activated the expression of lignin biosynthetic genes, consistent with the function of PtoMYB216. However, GUS staining assays revealed that PtoMYB170 was specifically expressed in guard cells of transgenic Arabidopsis while PtoMYB216 was not. Heterologous expression of PtoMYB170 in Arabidopsis enhanced stomatal closure in the dark and resulted in drought tolerance of the transgenic plants through reduced water loss, indicating a diversified role from PtoMYB216. These results revealed the PtoMYB170-dependent positive transcriptional regulation on lignin deposition in poplar and its coordinated function in enhancing drought tolerance by promoting dark-induced stomatal closure.</div>
</front>
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<Article PubModel="Print">
<Journal>
<ISSN IssnType="Electronic">1758-4469</ISSN>
<JournalIssue CitedMedium="Internet">
<Volume>37</Volume>
<Issue>12</Issue>
<PubDate>
<Year>2017</Year>
<Month>12</Month>
<Day>01</Day>
</PubDate>
</JournalIssue>
<Title>Tree physiology</Title>
<ISOAbbreviation>Tree Physiol</ISOAbbreviation>
</Journal>
<ArticleTitle>PtoMYB170 positively regulates lignin deposition during wood formation in poplar and confers drought tolerance in transgenic Arabidopsis.</ArticleTitle>
<Pagination>
<MedlinePgn>1713-1726</MedlinePgn>
</Pagination>
<ELocationID EIdType="doi" ValidYN="Y">10.1093/treephys/tpx093</ELocationID>
<Abstract>
<AbstractText>Wood formation is a complex developmental process under multi-level transcriptional control executed by a large set of transcription factors. However, only limited members have been characterized to be key regulators of lignin biosynthesis in poplar. Here we report the conserved and unique functions of PtoMYB170, a transcription factor identified from Populus tomentosa (Chinese white poplar), in lignin deposition and drought tolerance in comparison with its duplicate paralog PtoMYB216. PtoMYB170 is preferentially expressed in young leaves and xylem tissues. Overexpression of PtoMYB170 in transgenic poplar plants resulted in stronger lignification and more thickened secondary wall in xylem compared with wild-type plants, whereas the CRISPR/Cas9-generated mutation of PtoMYB170 weakened lignin deposition, thereby leading to a more flexible and collapsed xylem phenotype. Transient expression experiments demonstrated that PtoMYB170 specifically activated the expression of lignin biosynthetic genes, consistent with the function of PtoMYB216. However, GUS staining assays revealed that PtoMYB170 was specifically expressed in guard cells of transgenic Arabidopsis while PtoMYB216 was not. Heterologous expression of PtoMYB170 in Arabidopsis enhanced stomatal closure in the dark and resulted in drought tolerance of the transgenic plants through reduced water loss, indicating a diversified role from PtoMYB216. These results revealed the PtoMYB170-dependent positive transcriptional regulation on lignin deposition in poplar and its coordinated function in enhancing drought tolerance by promoting dark-induced stomatal closure.</AbstractText>
<CopyrightInformation>© The Author 2017. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.</CopyrightInformation>
</Abstract>
<AuthorList CompleteYN="Y">
<Author ValidYN="Y">
<LastName>Xu</LastName>
<ForeName>Changzheng</ForeName>
<Initials>C</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of Transgenic Plant and Safety Control, Institute of Resources Botany, School of Life Sciences, Southwest University, 400715 Chongqing, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Fu</LastName>
<ForeName>Xiaokang</ForeName>
<Initials>X</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of Transgenic Plant and Safety Control, Institute of Resources Botany, School of Life Sciences, Southwest University, 400715 Chongqing, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Liu</LastName>
<ForeName>Rui</ForeName>
<Initials>R</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of Transgenic Plant and Safety Control, Institute of Resources Botany, School of Life Sciences, Southwest University, 400715 Chongqing, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Guo</LastName>
<ForeName>Li</ForeName>
<Initials>L</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of Transgenic Plant and Safety Control, Institute of Resources Botany, School of Life Sciences, Southwest University, 400715 Chongqing, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Ran</LastName>
<ForeName>Lingyu</ForeName>
<Initials>L</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of Transgenic Plant and Safety Control, Institute of Resources Botany, School of Life Sciences, Southwest University, 400715 Chongqing, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Li</LastName>
<ForeName>Chaofeng</ForeName>
<Initials>C</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, 810008 Xining, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Tian</LastName>
<ForeName>Qiaoyan</ForeName>
<Initials>Q</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of Transgenic Plant and Safety Control, Institute of Resources Botany, School of Life Sciences, Southwest University, 400715 Chongqing, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Jiao</LastName>
<ForeName>Bo</ForeName>
<Initials>B</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of Transgenic Plant and Safety Control, Institute of Resources Botany, School of Life Sciences, Southwest University, 400715 Chongqing, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Wang</LastName>
<ForeName>Bangjun</ForeName>
<Initials>B</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of Transgenic Plant and Safety Control, Institute of Resources Botany, School of Life Sciences, Southwest University, 400715 Chongqing, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Luo</LastName>
<ForeName>Keming</ForeName>
<Initials>K</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of Transgenic Plant and Safety Control, Institute of Resources Botany, School of Life Sciences, Southwest University, 400715 Chongqing, China.</Affiliation>
</AffiliationInfo>
<AffiliationInfo>
<Affiliation>Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, 810008 Xining, China.</Affiliation>
</AffiliationInfo>
</Author>
</AuthorList>
<Language>eng</Language>
<PublicationTypeList>
<PublicationType UI="D016428">Journal Article</PublicationType>
<PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType>
</PublicationTypeList>
</Article>
<MedlineJournalInfo>
<Country>Canada</Country>
<MedlineTA>Tree Physiol</MedlineTA>
<NlmUniqueID>100955338</NlmUniqueID>
<ISSNLinking>0829-318X</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList>
<Chemical>
<RegistryNumber>9005-53-2</RegistryNumber>
<NameOfSubstance UI="D008031">Lignin</NameOfSubstance>
</Chemical>
</ChemicalList>
<CitationSubset>IM</CitationSubset>
<MeshHeadingList>
<MeshHeading>
<DescriptorName UI="D017360" MajorTopicYN="N">Arabidopsis</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D055864" MajorTopicYN="N">Droughts</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D020869" MajorTopicYN="N">Gene Expression Profiling</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D018506" MajorTopicYN="N">Gene Expression Regulation, Plant</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D008031" MajorTopicYN="N">Lignin</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D030821" MajorTopicYN="N">Plants, Genetically Modified</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D011401" MajorTopicYN="N">Promoter Regions, Genetic</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D014934" MajorTopicYN="N">Wood</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM">
<Keyword MajorTopicYN="Y">MYB transcription factor</Keyword>
<Keyword MajorTopicYN="Y">Populus tomentosa</Keyword>
<Keyword MajorTopicYN="Y">drought tolerance</Keyword>
<Keyword MajorTopicYN="Y">stomatal aperture</Keyword>
<Keyword MajorTopicYN="Y">wood formation</Keyword>
</KeywordList>
</MedlineCitation>
<PubmedData>
<History>
<PubMedPubDate PubStatus="received">
<Year>2017</Year>
<Month>01</Month>
<Day>23</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
<Year>2017</Year>
<Month>06</Month>
<Day>22</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="pubmed">
<Year>2017</Year>
<Month>10</Month>
<Day>7</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2018</Year>
<Month>10</Month>
<Day>23</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez">
<Year>2017</Year>
<Month>10</Month>
<Day>7</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">28985414</ArticleId>
<ArticleId IdType="pii">4049597</ArticleId>
<ArticleId IdType="doi">10.1093/treephys/tpx093</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="Xu, Changzheng" sort="Xu, Changzheng" uniqKey="Xu C" first="Changzheng" last="Xu">Changzheng Xu</name>
</noRegion>
<name sortKey="Fu, Xiaokang" sort="Fu, Xiaokang" uniqKey="Fu X" first="Xiaokang" last="Fu">Xiaokang Fu</name>
<name sortKey="Guo, Li" sort="Guo, Li" uniqKey="Guo L" first="Li" last="Guo">Li Guo</name>
<name sortKey="Jiao, Bo" sort="Jiao, Bo" uniqKey="Jiao B" first="Bo" last="Jiao">Bo Jiao</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="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>
<name sortKey="Wang, Bangjun" sort="Wang, Bangjun" uniqKey="Wang B" first="Bangjun" last="Wang">Bangjun Wang</name>
</country>
</tree>
</affiliations>
</record>

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