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Overexpression of PtrMYB119, a R2R3-MYB transcription factor from Populus trichocarpa, promotes anthocyanin production in hybrid poplar.

Identifieur interne : 001740 ( Main/Exploration ); précédent : 001739; suivant : 001741

Overexpression of PtrMYB119, a R2R3-MYB transcription factor from Populus trichocarpa, promotes anthocyanin production in hybrid poplar.

Auteurs : Jin-Seong Cho [Corée du Sud] ; Van Phap Nguyen [Corée du Sud] ; Hyung-Woo Jeon [Corée du Sud] ; Min-Ha Kim [Corée du Sud] ; Seok Hyun Eom [Corée du Sud] ; You Jin Lim [Corée du Sud] ; Won-Chan Kim [Corée du Sud] ; Eung-Jun Park [Corée du Sud] ; Young-Im Choi [Corée du Sud] ; Jae-Heung Ko [Corée du Sud]

Source :

RBID : pubmed:27259636

Descripteurs français

English descriptors

Abstract

Anthocyanins are a group of colorful and bioactive natural pigments with important physiological and ecological functions in plants. We found an MYB transcription factor (PtrMYB119) from Populus trichocarpa that positively regulates anthocyanin production when expressed under the control of the CaMV 35S promoter in transgenic Arabidopsis Amino acid sequence analysis revealed that PtrMYB119 is highly homologous to Arabidopsis PAP1 (PRODUCTION OF ANTHOCYANIN PIGMENT1), a well-known transcriptional activator of anthocyanin biosynthesis. Independently produced transgenic poplars overexpressing PtrMYB119 or PtrMYB120 (a paralogous gene to PtrMYB119) (i.e., 35S::PtrMYB119 and 35S::PtrMYB120, respectively) showed elevated accumulation of anthocyanins in the whole plants, including leaf, stem and even root tissues. Using a reverse-phase high-performance liquid chromatography, we confirmed that the majority of the accumulated anthocyanin in our transgenic poplar is cyanidin-3-O-glucoside. Gene expression analyses revealed that most of the genes involved in the anthocyanin biosynthetic pathway were highly upregulated in 35S::PtrMYB119 poplars compared with the nontransformed control poplar. Among these genes, expression of PtrCHS1 (Chalcone Synthase1) and PtrANS2 (Anthocyanin Synthase2), which catalyze the initial and last steps of anthocyanin biosynthesis, respectively, was upregulated by up to 350-fold. Subsequent transient activation assays confirmed that PtrMYB119 activated the transcription of both PtrCHS1 and PtrANS2 Interestingly, expression of MYB182, a repressor of both anthocyanin and proanthocyanidin (PA) biosynthesis, was largely suppressed in 35S::PtrMYB119 poplars, while expression of MYB134, an activator of PA biosynthesis, was not changed significantly. More interestingly, high-level accumulation of anthocyanins in 35S::PtrMYB119 poplars did not have an adverse effect on plant growth. Taken together, our results demonstrate that PtrMYB119 and PtrMYB120 function as transcriptional activators of anthocyanin accumulation in both Arabidopsis and poplar.

DOI: 10.1093/treephys/tpw046
PubMed: 27259636


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<term>Cloning, Molecular (MeSH)</term>
<term>Pancreatitis-Associated Proteins (MeSH)</term>
<term>Plant Proteins (metabolism)</term>
<term>Plants, Genetically Modified (MeSH)</term>
<term>Populus (genetics)</term>
<term>Populus (metabolism)</term>
<term>Transcription Factors (metabolism)</term>
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<term>Trees (metabolism)</term>
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<term>Anthocyanes (biosynthèse)</term>
<term>Arabidopsis (MeSH)</term>
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<term>Arbres (métabolisme)</term>
<term>Clonage moléculaire (MeSH)</term>
<term>Facteurs de transcription (métabolisme)</term>
<term>Populus (génétique)</term>
<term>Populus (métabolisme)</term>
<term>Protéines associées à la pancréatite (MeSH)</term>
<term>Protéines végétales (métabolisme)</term>
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<div type="abstract" xml:lang="en">Anthocyanins are a group of colorful and bioactive natural pigments with important physiological and ecological functions in plants. We found an MYB transcription factor (PtrMYB119) from Populus trichocarpa that positively regulates anthocyanin production when expressed under the control of the CaMV 35S promoter in transgenic Arabidopsis Amino acid sequence analysis revealed that PtrMYB119 is highly homologous to Arabidopsis PAP1 (PRODUCTION OF ANTHOCYANIN PIGMENT1), a well-known transcriptional activator of anthocyanin biosynthesis. Independently produced transgenic poplars overexpressing PtrMYB119 or PtrMYB120 (a paralogous gene to PtrMYB119) (i.e., 35S::PtrMYB119 and 35S::PtrMYB120, respectively) showed elevated accumulation of anthocyanins in the whole plants, including leaf, stem and even root tissues. Using a reverse-phase high-performance liquid chromatography, we confirmed that the majority of the accumulated anthocyanin in our transgenic poplar is cyanidin-3-O-glucoside. Gene expression analyses revealed that most of the genes involved in the anthocyanin biosynthetic pathway were highly upregulated in 35S::PtrMYB119 poplars compared with the nontransformed control poplar. Among these genes, expression of PtrCHS1 (Chalcone Synthase1) and PtrANS2 (Anthocyanin Synthase2), which catalyze the initial and last steps of anthocyanin biosynthesis, respectively, was upregulated by up to 350-fold. Subsequent transient activation assays confirmed that PtrMYB119 activated the transcription of both PtrCHS1 and PtrANS2 Interestingly, expression of MYB182, a repressor of both anthocyanin and proanthocyanidin (PA) biosynthesis, was largely suppressed in 35S::PtrMYB119 poplars, while expression of MYB134, an activator of PA biosynthesis, was not changed significantly. More interestingly, high-level accumulation of anthocyanins in 35S::PtrMYB119 poplars did not have an adverse effect on plant growth. Taken together, our results demonstrate that PtrMYB119 and PtrMYB120 function as transcriptional activators of anthocyanin accumulation in both Arabidopsis and poplar.</div>
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<AbstractText>Anthocyanins are a group of colorful and bioactive natural pigments with important physiological and ecological functions in plants. We found an MYB transcription factor (PtrMYB119) from Populus trichocarpa that positively regulates anthocyanin production when expressed under the control of the CaMV 35S promoter in transgenic Arabidopsis Amino acid sequence analysis revealed that PtrMYB119 is highly homologous to Arabidopsis PAP1 (PRODUCTION OF ANTHOCYANIN PIGMENT1), a well-known transcriptional activator of anthocyanin biosynthesis. Independently produced transgenic poplars overexpressing PtrMYB119 or PtrMYB120 (a paralogous gene to PtrMYB119) (i.e., 35S::PtrMYB119 and 35S::PtrMYB120, respectively) showed elevated accumulation of anthocyanins in the whole plants, including leaf, stem and even root tissues. Using a reverse-phase high-performance liquid chromatography, we confirmed that the majority of the accumulated anthocyanin in our transgenic poplar is cyanidin-3-O-glucoside. Gene expression analyses revealed that most of the genes involved in the anthocyanin biosynthetic pathway were highly upregulated in 35S::PtrMYB119 poplars compared with the nontransformed control poplar. Among these genes, expression of PtrCHS1 (Chalcone Synthase1) and PtrANS2 (Anthocyanin Synthase2), which catalyze the initial and last steps of anthocyanin biosynthesis, respectively, was upregulated by up to 350-fold. Subsequent transient activation assays confirmed that PtrMYB119 activated the transcription of both PtrCHS1 and PtrANS2 Interestingly, expression of MYB182, a repressor of both anthocyanin and proanthocyanidin (PA) biosynthesis, was largely suppressed in 35S::PtrMYB119 poplars, while expression of MYB134, an activator of PA biosynthesis, was not changed significantly. More interestingly, high-level accumulation of anthocyanins in 35S::PtrMYB119 poplars did not have an adverse effect on plant growth. Taken together, our results demonstrate that PtrMYB119 and PtrMYB120 function as transcriptional activators of anthocyanin accumulation in both Arabidopsis and poplar.</AbstractText>
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<ForeName>Seok Hyun</ForeName>
<Initials>SH</Initials>
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<Affiliation>Department of Horticultural Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea.</Affiliation>
</AffiliationInfo>
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<LastName>Lim</LastName>
<ForeName>You Jin</ForeName>
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<Affiliation>Department of Horticultural Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea.</Affiliation>
</AffiliationInfo>
</Author>
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<LastName>Kim</LastName>
<ForeName>Won-Chan</ForeName>
<Initials>WC</Initials>
<AffiliationInfo>
<Affiliation>School of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Park</LastName>
<ForeName>Eung-Jun</ForeName>
<Initials>EJ</Initials>
<AffiliationInfo>
<Affiliation>Division of Forest Biotechnology, Korea Forest Research Institute, Suwon 16631, Republic of Korea.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Choi</LastName>
<ForeName>Young-Im</ForeName>
<Initials>YI</Initials>
<AffiliationInfo>
<Affiliation>Division of Forest Biotechnology, Korea Forest Research Institute, Suwon 16631, Republic of Korea yichoi99@korea.kr jhko@khu.ac.kr.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Ko</LastName>
<ForeName>Jae-Heung</ForeName>
<Initials>JH</Initials>
<AffiliationInfo>
<Affiliation>Department of Plant & Environmental New Resources, Kyung Hee University, Yongin 446-701, Yongin 17104, Republic of Korea yichoi99@korea.kr jhko@khu.ac.kr.</Affiliation>
</AffiliationInfo>
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<Language>eng</Language>
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<PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType>
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<Year>2016</Year>
<Month>06</Month>
<Day>03</Day>
</ArticleDate>
</Article>
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<Country>Canada</Country>
<MedlineTA>Tree Physiol</MedlineTA>
<NlmUniqueID>100955338</NlmUniqueID>
<ISSNLinking>0829-318X</ISSNLinking>
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<NameOfSubstance UI="D000872">Anthocyanins</NameOfSubstance>
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<NameOfSubstance UI="D000073718">Pancreatitis-Associated Proteins</NameOfSubstance>
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<DescriptorName UI="D000872" MajorTopicYN="N">Anthocyanins</DescriptorName>
<QualifierName UI="Q000096" MajorTopicYN="Y">biosynthesis</QualifierName>
</MeshHeading>
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<DescriptorName UI="D017360" MajorTopicYN="N">Arabidopsis</DescriptorName>
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<DescriptorName UI="D003001" MajorTopicYN="N">Cloning, Molecular</DescriptorName>
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<DescriptorName UI="D000073718" MajorTopicYN="N">Pancreatitis-Associated Proteins</DescriptorName>
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<MeshHeading>
<DescriptorName UI="D010940" MajorTopicYN="N">Plant Proteins</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
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<MeshHeading>
<DescriptorName UI="D030821" MajorTopicYN="N">Plants, Genetically Modified</DescriptorName>
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<MeshHeading>
<DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="Y">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D014157" MajorTopicYN="N">Transcription Factors</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
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<MeshHeading>
<DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="Y">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM">
<Keyword MajorTopicYN="Y">pigment</Keyword>
<Keyword MajorTopicYN="Y">transcriptional activator</Keyword>
<Keyword MajorTopicYN="Y">transgenic poplar</Keyword>
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</MedlineCitation>
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<PubMedPubDate PubStatus="received">
<Year>2015</Year>
<Month>10</Month>
<Day>13</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
<Year>2016</Year>
<Month>04</Month>
<Day>26</Day>
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<PubMedPubDate PubStatus="entrez">
<Year>2016</Year>
<Month>6</Month>
<Day>5</Day>
<Hour>6</Hour>
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<Day>5</Day>
<Hour>6</Hour>
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<PubMedPubDate PubStatus="medline">
<Year>2017</Year>
<Month>8</Month>
<Day>31</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">27259636</ArticleId>
<ArticleId IdType="pii">tpw046</ArticleId>
<ArticleId IdType="doi">10.1093/treephys/tpw046</ArticleId>
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</pubmed>
<affiliations>
<list>
<country>
<li>Corée du Sud</li>
</country>
</list>
<tree>
<country name="Corée du Sud">
<noRegion>
<name sortKey="Cho, Jin Seong" sort="Cho, Jin Seong" uniqKey="Cho J" first="Jin-Seong" last="Cho">Jin-Seong Cho</name>
</noRegion>
<name sortKey="Choi, Young Im" sort="Choi, Young Im" uniqKey="Choi Y" first="Young-Im" last="Choi">Young-Im Choi</name>
<name sortKey="Eom, Seok Hyun" sort="Eom, Seok Hyun" uniqKey="Eom S" first="Seok Hyun" last="Eom">Seok Hyun Eom</name>
<name sortKey="Jeon, Hyung Woo" sort="Jeon, Hyung Woo" uniqKey="Jeon H" first="Hyung-Woo" last="Jeon">Hyung-Woo Jeon</name>
<name sortKey="Kim, Min Ha" sort="Kim, Min Ha" uniqKey="Kim M" first="Min-Ha" last="Kim">Min-Ha Kim</name>
<name sortKey="Kim, Won Chan" sort="Kim, Won Chan" uniqKey="Kim W" first="Won-Chan" last="Kim">Won-Chan Kim</name>
<name sortKey="Ko, Jae Heung" sort="Ko, Jae Heung" uniqKey="Ko J" first="Jae-Heung" last="Ko">Jae-Heung Ko</name>
<name sortKey="Lim, You Jin" sort="Lim, You Jin" uniqKey="Lim Y" first="You Jin" last="Lim">You Jin Lim</name>
<name sortKey="Nguyen, Van Phap" sort="Nguyen, Van Phap" uniqKey="Nguyen V" first="Van Phap" last="Nguyen">Van Phap Nguyen</name>
<name sortKey="Park, Eung Jun" sort="Park, Eung Jun" uniqKey="Park E" first="Eung-Jun" last="Park">Eung-Jun Park</name>
</country>
</tree>
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</record>

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