PoplarV1, Main, Exploration, bibRecord, 001A81

Transgenic hybrid aspen trees with increased gibberellin (GA) concentrations suggest that GA acts in parallel with FLOWERING LOCUS T2 to control shoot elongation.

Identifieur interne : 001A81 ( Main/Exploration ); précédent : 001A80; suivant : 001A82

Transgenic hybrid aspen trees with increased gibberellin (GA) concentrations suggest that GA acts in parallel with FLOWERING LOCUS T2 to control shoot elongation.

Auteurs : Maria E. Eriksson [Suède] ; Daniel Hoffman ; Mateusz Kaduk ; Mélanie Mauriat ; Thomas Moritz

Source :

The New phytologist [ 1469-8137 ] ; 2015.

RBID : pubmed:25382585

Descripteurs français

English descriptors

KwdEn :
- Circadian Clocks (MeSH), Crosses, Genetic (MeSH), Down-Regulation (MeSH), Gene Expression Regulation, Plant (MeSH), Genes, Plant (MeSH), Gibberellins (metabolism), Hybridization, Genetic (MeSH), Photoperiod (MeSH), Photoreceptors, Plant (metabolism), Plant Proteins (metabolism), Plant Shoots (growth & development), Plant Shoots (metabolism), Plants, Genetically Modified (MeSH), Populus (genetics), Populus (growth & development), Populus (metabolism), Real-Time Polymerase Chain Reaction (MeSH), Trees (metabolism).
MESH :
- chemical , metabolism : Gibberellins, Photoreceptors, Plant, Plant Proteins.
- genetics : Populus.
- growth & development : Plant Shoots, Populus.
- metabolism : Plant Shoots, Populus, Trees.
- Circadian Clocks, Crosses, Genetic, Down-Regulation, Gene Expression Regulation, Plant, Genes, Plant, Hybridization, Genetic, Photoperiod, Plants, Genetically Modified, Real-Time Polymerase Chain Reaction.

Abstract

Bioactive gibberellins (GAs) have been implicated in short day (SD)-induced growth cessation in Populus, because exogenous applications of bioactive GAs to hybrid aspens (Populus tremula × tremuloides) under SD conditions delay growth cessation. However, this effect diminishes with time, suggesting that plants may cease growth following exposure to SDs due to a reduction in sensitivity to GAs. In order to validate and further explore the role of GAs in growth cessation, we perturbed GA biosynthesis or signalling in hybrid aspen plants by overexpressing AtGA20ox1, AtGA2ox2 and PttGID1.3 (encoding GA biosynthesis enzymes and a GA receptor). We found trees with elevated concentrations of bioactive GA, due to overexpression of AtGA20ox1, continued to grow in SD conditions and were insensitive to the level of FLOWERING LOCUS T2 (FT2) expression. As transgenic plants overexpressing the PttGID1.3 GA receptor responded in a wild-type (WT) manner to SD conditions, this insensitivity did not result from limited receptor availability. As high concentrations of bioactive GA during SD conditions were sufficient to sustain shoot elongation growth in hybrid aspen trees, independent of FT2 expression levels, we conclude elongation growth in trees is regulated by both GA- and long day-responsive pathways, similar to the regulation of flowering in Arabidopsis thaliana.

DOI: 10.1111/nph.13144
PubMed: 25382585

Affiliations:

Suède

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Le document en format XML

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<term>Crosses, Genetic (MeSH)</term>
<term>Down-Regulation (MeSH)</term>
<term>Gene Expression Regulation, Plant (MeSH)</term>
<term>Genes, Plant (MeSH)</term>
<term>Gibberellins (metabolism)</term>
<term>Hybridization, Genetic (MeSH)</term>
<term>Photoperiod (MeSH)</term>
<term>Photoreceptors, Plant (metabolism)</term>
<term>Plant Proteins (metabolism)</term>
<term>Plant Shoots (growth & development)</term>
<term>Plant Shoots (metabolism)</term>
<term>Plants, Genetically Modified (MeSH)</term>
<term>Populus (genetics)</term>
<term>Populus (growth & development)</term>
<term>Populus (metabolism)</term>
<term>Real-Time Polymerase Chain Reaction (MeSH)</term>
<term>Trees (metabolism)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Arbres (métabolisme)</term>
<term>Croisements génétiques (MeSH)</term>
<term>Gibbérellines (métabolisme)</term>
<term>Gènes de plante (MeSH)</term>
<term>Horloges circadiennes (MeSH)</term>
<term>Hybridation génétique (MeSH)</term>
<term>Photopériode (MeSH)</term>
<term>Photorécepteurs végétaux (métabolisme)</term>
<term>Populus (croissance et développement)</term>
<term>Populus (génétique)</term>
<term>Populus (métabolisme)</term>
<term>Pousses de plante (croissance et développement)</term>
<term>Pousses de plante (métabolisme)</term>
<term>Protéines végétales (métabolisme)</term>
<term>Réaction de polymérisation en chaine en temps réel (MeSH)</term>
<term>Régulation de l'expression des gènes végétaux (MeSH)</term>
<term>Régulation négative (MeSH)</term>
<term>Végétaux génétiquement modifiés (MeSH)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Gibberellins</term>
<term>Photoreceptors, Plant</term>
<term>Plant Proteins</term>
</keywords>
<keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Populus</term>
<term>Pousses de plante</term>
</keywords>
<keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Populus</term>
</keywords>
<keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Plant Shoots</term>
<term>Populus</term>
</keywords>
<keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Populus</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Shoots</term>
<term>Populus</term>
<term>Trees</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Arbres</term>
<term>Gibbérellines</term>
<term>Photorécepteurs végétaux</term>
<term>Populus</term>
<term>Pousses de plante</term>
<term>Protéines végétales</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Circadian Clocks</term>
<term>Crosses, Genetic</term>
<term>Down-Regulation</term>
<term>Gene Expression Regulation, Plant</term>
<term>Genes, Plant</term>
<term>Hybridization, Genetic</term>
<term>Photoperiod</term>
<term>Plants, Genetically Modified</term>
<term>Real-Time Polymerase Chain Reaction</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr"><term>Croisements génétiques</term>
<term>Gènes de plante</term>
<term>Horloges circadiennes</term>
<term>Hybridation génétique</term>
<term>Photopériode</term>
<term>Réaction de polymérisation en chaine en temps réel</term>
<term>Régulation de l'expression des gènes végétaux</term>
<term>Régulation négative</term>
<term>Végétaux génétiquement modifiés</term>
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<front><div type="abstract" xml:lang="en">Bioactive gibberellins (GAs) have been implicated in short day (SD)-induced growth cessation in Populus, because exogenous applications of bioactive GAs to hybrid aspens (Populus tremula × tremuloides) under SD conditions delay growth cessation. However, this effect diminishes with time, suggesting that plants may cease growth following exposure to SDs due to a reduction in sensitivity to GAs. In order to validate and further explore the role of GAs in growth cessation, we perturbed GA biosynthesis or signalling in hybrid aspen plants by overexpressing AtGA20ox1, AtGA2ox2 and PttGID1.3 (encoding GA biosynthesis enzymes and a GA receptor). We found trees with elevated concentrations of bioactive GA, due to overexpression of AtGA20ox1, continued to grow in SD conditions and were insensitive to the level of FLOWERING LOCUS T2 (FT2) expression. As transgenic plants overexpressing the PttGID1.3 GA receptor responded in a wild-type (WT) manner to SD conditions, this insensitivity did not result from limited receptor availability. As high concentrations of bioactive GA during SD conditions were sufficient to sustain shoot elongation growth in hybrid aspen trees, independent of FT2 expression levels, we conclude elongation growth in trees is regulated by both GA- and long day-responsive pathways, similar to the regulation of flowering in Arabidopsis thaliana. </div>
</front>
</TEI>
<pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">25382585</PMID>
<DateCompleted><Year>2016</Year>
<Month>01</Month>
<Day>04</Day>
</DateCompleted>
<DateRevised><Year>2020</Year>
<Month>09</Month>
<Day>30</Day>
</DateRevised>
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<JournalIssue CitedMedium="Internet"><Volume>205</Volume>
<Issue>3</Issue>
<PubDate><Year>2015</Year>
<Month>Feb</Month>
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<Title>The New phytologist</Title>
<ISOAbbreviation>New Phytol</ISOAbbreviation>
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<ArticleTitle>Transgenic hybrid aspen trees with increased gibberellin (GA) concentrations suggest that GA acts in parallel with FLOWERING LOCUS T2 to control shoot elongation.</ArticleTitle>
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</Pagination>
<ELocationID EIdType="doi" ValidYN="Y">10.1111/nph.13144</ELocationID>
<Abstract><AbstractText>Bioactive gibberellins (GAs) have been implicated in short day (SD)-induced growth cessation in Populus, because exogenous applications of bioactive GAs to hybrid aspens (Populus tremula × tremuloides) under SD conditions delay growth cessation. However, this effect diminishes with time, suggesting that plants may cease growth following exposure to SDs due to a reduction in sensitivity to GAs. In order to validate and further explore the role of GAs in growth cessation, we perturbed GA biosynthesis or signalling in hybrid aspen plants by overexpressing AtGA20ox1, AtGA2ox2 and PttGID1.3 (encoding GA biosynthesis enzymes and a GA receptor). We found trees with elevated concentrations of bioactive GA, due to overexpression of AtGA20ox1, continued to grow in SD conditions and were insensitive to the level of FLOWERING LOCUS T2 (FT2) expression. As transgenic plants overexpressing the PttGID1.3 GA receptor responded in a wild-type (WT) manner to SD conditions, this insensitivity did not result from limited receptor availability. As high concentrations of bioactive GA during SD conditions were sufficient to sustain shoot elongation growth in hybrid aspen trees, independent of FT2 expression levels, we conclude elongation growth in trees is regulated by both GA- and long day-responsive pathways, similar to the regulation of flowering in Arabidopsis thaliana. </AbstractText>
<CopyrightInformation>© 2014 The Authors. New Phytologist © 2014 New Phytologist Trust.</CopyrightInformation>
</Abstract>
<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Eriksson</LastName>
<ForeName>Maria E</ForeName>
<Initials>ME</Initials>
<AffiliationInfo><Affiliation>Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, SE-901 87, Umeå, Sweden.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Hoffman</LastName>
<ForeName>Daniel</ForeName>
<Initials>D</Initials>
</Author>
<Author ValidYN="Y"><LastName>Kaduk</LastName>
<ForeName>Mateusz</ForeName>
<Initials>M</Initials>
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<Author ValidYN="Y"><LastName>Mauriat</LastName>
<ForeName>Mélanie</ForeName>
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<Author ValidYN="Y"><LastName>Moritz</LastName>
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<Initials>T</Initials>
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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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<ArticleDate DateType="Electronic"><Year>2014</Year>
<Month>11</Month>
<Day>10</Day>
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</Article>
<MedlineJournalInfo><Country>England</Country>
<MedlineTA>New Phytol</MedlineTA>
<NlmUniqueID>9882884</NlmUniqueID>
<ISSNLinking>0028-646X</ISSNLinking>
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<ChemicalList><Chemical><RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D005875">Gibberellins</NameOfSubstance>
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<NameOfSubstance UI="D055519">Photoreceptors, Plant</NameOfSubstance>
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<MeshHeadingList><MeshHeading><DescriptorName UI="D057906" MajorTopicYN="N">Circadian Clocks</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D003433" MajorTopicYN="N">Crosses, Genetic</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D015536" MajorTopicYN="N">Down-Regulation</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D018506" MajorTopicYN="N">Gene Expression Regulation, Plant</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D017343" MajorTopicYN="N">Genes, Plant</DescriptorName>
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<MeshHeading><DescriptorName UI="D055519" MajorTopicYN="N">Photoreceptors, Plant</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
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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="D018520" MajorTopicYN="N">Plant Shoots</DescriptorName>
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<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<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="N">genetics</QualifierName>
<QualifierName UI="Q000254" MajorTopicYN="Y">growth & development</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D060888" MajorTopicYN="N">Real-Time Polymerase Chain Reaction</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Flowering Locus T2 (FT2)</Keyword>
<Keyword MajorTopicYN="N">Populus</Keyword>
<Keyword MajorTopicYN="N">gibberellins (GA)</Keyword>
<Keyword MajorTopicYN="N">growth cessation</Keyword>
<Keyword MajorTopicYN="N">photoperiod</Keyword>
</KeywordList>
</MedlineCitation>
<PubmedData><History><PubMedPubDate PubStatus="received"><Year>2014</Year>
<Month>07</Month>
<Day>04</Day>
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<PubMedPubDate PubStatus="accepted"><Year>2014</Year>
<Month>09</Month>
<Day>24</Day>
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<PubMedPubDate PubStatus="entrez"><Year>2014</Year>
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<tree><noCountry><name sortKey="Hoffman, Daniel" sort="Hoffman, Daniel" uniqKey="Hoffman D" first="Daniel" last="Hoffman">Daniel Hoffman</name>
<name sortKey="Kaduk, Mateusz" sort="Kaduk, Mateusz" uniqKey="Kaduk M" first="Mateusz" last="Kaduk">Mateusz Kaduk</name>
<name sortKey="Mauriat, Melanie" sort="Mauriat, Melanie" uniqKey="Mauriat M" first="Mélanie" last="Mauriat">Mélanie Mauriat</name>
<name sortKey="Moritz, Thomas" sort="Moritz, Thomas" uniqKey="Moritz T" first="Thomas" last="Moritz">Thomas Moritz</name>
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<country name="Suède"><noRegion><name sortKey="Eriksson, Maria E" sort="Eriksson, Maria E" uniqKey="Eriksson M" first="Maria E" last="Eriksson">Maria E. Eriksson</name>
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Transgenic hybrid aspen trees with increased gibberellin (GA) concentrations suggest that GA acts in parallel with FLOWERING LOCUS T2 to control shoot elongation.

Transgenic hybrid aspen trees with increased gibberellin (GA) concentrations suggest that GA acts in parallel with FLOWERING LOCUS T2 to control shoot elongation.

Source :

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English descriptors

Abstract

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