Down-regulation of glycosyltransferase 8D genes in Populus trichocarpa caused reduced mechanical strength and xylan content in wood.
Identifieur interne : 002F16 ( Main/Exploration ); précédent : 002F15; suivant : 002F17Down-regulation of glycosyltransferase 8D genes in Populus trichocarpa caused reduced mechanical strength and xylan content in wood.
Auteurs : Quanzi Li [États-Unis] ; Douyong Min ; Jack Peng-Yu Wang ; Ilona Peszlen ; Laszlo Horvath ; Balazs Horvath ; Yufuko Nishimura ; Hasan Jameel ; Hou-Min Chang ; Vincent L. ChiangSource :
- Tree physiology [ 1758-4469 ] ; 2011.
Descripteurs français
- KwdFr :
- Arabidopsis (génétique), Arabidopsis (métabolisme), Bois (analyse), Contrainte mécanique (MeSH), Facteurs de transcription (MeSH), Glycosyltransferase (génétique), Glycosyltransferase (métabolisme), Gènes de plante (MeSH), Module d'élasticité (MeSH), Paroi cellulaire (métabolisme), Populus (génétique), Populus (métabolisme), Régulation de l'expression des gènes végétaux (MeSH), Régulation négative (MeSH), Tiges de plante (composition chimique), Variation génétique (MeSH), Végétaux génétiquement modifiés (génétique), Végétaux génétiquement modifiés (métabolisme), Xylanes (biosynthèse), Xylanes (génétique).
- MESH :
- analyse : Bois.
- biosynthèse : Xylanes.
- composition chimique : Tiges de plante.
- génétique : Arabidopsis, Glycosyltransferase, Populus, Végétaux génétiquement modifiés, Xylanes.
- métabolisme : Arabidopsis, Glycosyltransferase, Paroi cellulaire, Populus, Végétaux génétiquement modifiés.
- Contrainte mécanique, Facteurs de transcription, Gènes de plante, Module d'élasticité, Régulation de l'expression des gènes végétaux, Régulation négative, Variation génétique.
English descriptors
- KwdEn :
- Arabidopsis (genetics), Arabidopsis (metabolism), Cell Wall (metabolism), Down-Regulation (MeSH), Elastic Modulus (MeSH), Gene Expression Regulation, Plant (MeSH), Genes, Plant (MeSH), Genetic Variation (MeSH), Glycosyltransferases (genetics), Glycosyltransferases (metabolism), Plant Stems (chemistry), Plants, Genetically Modified (genetics), Plants, Genetically Modified (metabolism), Populus (genetics), Populus (metabolism), Stress, Mechanical (MeSH), Transcription Factors (MeSH), Wood (analysis), Xylans (biosynthesis), Xylans (genetics).
- MESH :
- chemical , biosynthesis : Xylans.
- chemical , genetics : Glycosyltransferases, Xylans.
- analysis : Wood.
- chemistry : Plant Stems.
- genetics : Arabidopsis, Plants, Genetically Modified, Populus.
- metabolism : Arabidopsis, Cell Wall, Glycosyltransferases, Plants, Genetically Modified, Populus.
- Down-Regulation, Elastic Modulus, Gene Expression Regulation, Plant, Genes, Plant, Genetic Variation, Stress, Mechanical, Transcription Factors.
Abstract
Members of glycosyltransferase protein families GT8, GT43 and GT47 are implicated in the biosynthesis of xylan in the secondary cell walls of Arabidopsis. The Arabidopsis mutant irx8 has a 60% reduction in xylan. However, over-expression of an ortholog of Arabidopsis IRX8, poplar PoGT8D, in Arabidopsis irx8 mutant could not restore xylan synthesis. The functions of tree GT8D genes remain unclear. We identified two GT8 gene homologs, PtrGT8D1 and PtrGT8D2, in Populus trichocarpa. They are the only two GT8D members and are abundantly and specifically expressed in the differentiating xylem of P. trichocarpa. PtrGT8D1 transcript abundance was >7 times that of PtrGT8D2. To elucidate the genetic function of GT8D in P. trichocarpa, the expression of PtrGT8D1 and PtrGT8D2 was simultaneously knocked down through RNAi. Four transgenic lines had 85-94% reduction in transcripts of PtrGT8D1 and PtrGT8D2, resulting in 29-36% reduction in stem wood xylan content. Xylan reduction had essentially no effect on cellulose quantity but caused an 11-25% increase in lignin. These transgenics exhibit a brittle wood phenotype, accompanied by increased vessel diameter and thinner fiber cell walls in stem xylem. Stem modulus of elasticity and modulus of rupture were reduced by 17-29% and 16-23%, respectively, and were positively correlated with xylan content but negatively correlated with lignin quantity. These results suggest that PtrGT8Ds play key roles in xylan biosynthesis in wood. Xylan may be a more important factor than lignin affecting the stiffness and fracture strength of wood.
DOI: 10.1093/treephys/tpr008
PubMed: 21450982
Affiliations:
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Chiang</name></author></analytic><series><title level="j">Tree physiology</title><idno type="eISSN">1758-4469</idno><imprint><date when="2011" type="published">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Arabidopsis (genetics)</term><term>Arabidopsis (metabolism)</term><term>Cell Wall (metabolism)</term><term>Down-Regulation (MeSH)</term><term>Elastic Modulus (MeSH)</term><term>Gene Expression Regulation, Plant (MeSH)</term><term>Genes, Plant (MeSH)</term><term>Genetic Variation (MeSH)</term><term>Glycosyltransferases (genetics)</term><term>Glycosyltransferases (metabolism)</term><term>Plant Stems (chemistry)</term><term>Plants, Genetically Modified (genetics)</term><term>Plants, Genetically Modified (metabolism)</term><term>Populus (genetics)</term><term>Populus (metabolism)</term><term>Stress, Mechanical (MeSH)</term><term>Transcription Factors (MeSH)</term><term>Wood (analysis)</term><term>Xylans (biosynthesis)</term><term>Xylans (genetics)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Arabidopsis (génétique)</term><term>Arabidopsis (métabolisme)</term><term>Bois (analyse)</term><term>Contrainte mécanique (MeSH)</term><term>Facteurs de transcription (MeSH)</term><term>Glycosyltransferase (génétique)</term><term>Glycosyltransferase (métabolisme)</term><term>Gènes de plante (MeSH)</term><term>Module d'élasticité (MeSH)</term><term>Paroi cellulaire (métabolisme)</term><term>Populus (génétique)</term><term>Populus (métabolisme)</term><term>Régulation de l'expression des gènes végétaux (MeSH)</term><term>Régulation négative (MeSH)</term><term>Tiges de plante (composition chimique)</term><term>Variation génétique (MeSH)</term><term>Végétaux génétiquement modifiés (génétique)</term><term>Végétaux génétiquement modifiés (métabolisme)</term><term>Xylanes (biosynthèse)</term><term>Xylanes (génétique)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="biosynthesis" xml:lang="en"><term>Xylans</term></keywords><keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en"><term>Glycosyltransferases</term><term>Xylans</term></keywords><keywords scheme="MESH" qualifier="analyse" xml:lang="fr"><term>Bois</term></keywords><keywords scheme="MESH" qualifier="analysis" xml:lang="en"><term>Wood</term></keywords><keywords scheme="MESH" qualifier="biosynthèse" xml:lang="fr"><term>Xylanes</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Plant Stems</term></keywords><keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr"><term>Tiges de plante</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Arabidopsis</term><term>Plants, Genetically Modified</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Arabidopsis</term><term>Glycosyltransferase</term><term>Populus</term><term>Végétaux génétiquement modifiés</term><term>Xylanes</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Arabidopsis</term><term>Cell Wall</term><term>Glycosyltransferases</term><term>Plants, Genetically Modified</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Arabidopsis</term><term>Glycosyltransferase</term><term>Paroi cellulaire</term><term>Populus</term><term>Végétaux génétiquement modifiés</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Down-Regulation</term><term>Elastic Modulus</term><term>Gene Expression Regulation, Plant</term><term>Genes, Plant</term><term>Genetic Variation</term><term>Stress, Mechanical</term><term>Transcription Factors</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Contrainte mécanique</term><term>Facteurs de transcription</term><term>Gènes de plante</term><term>Module d'élasticité</term><term>Régulation de l'expression des gènes végétaux</term><term>Régulation négative</term><term>Variation génétique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Members of glycosyltransferase protein families GT8, GT43 and GT47 are implicated in the biosynthesis of xylan in the secondary cell walls of Arabidopsis. The Arabidopsis mutant irx8 has a 60% reduction in xylan. However, over-expression of an ortholog of Arabidopsis IRX8, poplar PoGT8D, in Arabidopsis irx8 mutant could not restore xylan synthesis. The functions of tree GT8D genes remain unclear. We identified two GT8 gene homologs, PtrGT8D1 and PtrGT8D2, in Populus trichocarpa. They are the only two GT8D members and are abundantly and specifically expressed in the differentiating xylem of P. trichocarpa. PtrGT8D1 transcript abundance was >7 times that of PtrGT8D2. To elucidate the genetic function of GT8D in P. trichocarpa, the expression of PtrGT8D1 and PtrGT8D2 was simultaneously knocked down through RNAi. Four transgenic lines had 85-94% reduction in transcripts of PtrGT8D1 and PtrGT8D2, resulting in 29-36% reduction in stem wood xylan content. Xylan reduction had essentially no effect on cellulose quantity but caused an 11-25% increase in lignin. These transgenics exhibit a brittle wood phenotype, accompanied by increased vessel diameter and thinner fiber cell walls in stem xylem. Stem modulus of elasticity and modulus of rupture were reduced by 17-29% and 16-23%, respectively, and were positively correlated with xylan content but negatively correlated with lignin quantity. These results suggest that PtrGT8Ds play key roles in xylan biosynthesis in wood. Xylan may be a more important factor than lignin affecting the stiffness and fracture strength of wood.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">21450982</PMID><DateCompleted><Year>2011</Year><Month>09</Month><Day>12</Day></DateCompleted><DateRevised><Year>2011</Year><Month>03</Month><Day>31</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1758-4469</ISSN><JournalIssue CitedMedium="Internet"><Volume>31</Volume><Issue>2</Issue><PubDate><Year>2011</Year><Month>Feb</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Down-regulation of glycosyltransferase 8D genes in Populus trichocarpa caused reduced mechanical strength and xylan content in wood.</ArticleTitle><Pagination><MedlinePgn>226-36</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1093/treephys/tpr008</ELocationID><Abstract><AbstractText>Members of glycosyltransferase protein families GT8, GT43 and GT47 are implicated in the biosynthesis of xylan in the secondary cell walls of Arabidopsis. The Arabidopsis mutant irx8 has a 60% reduction in xylan. However, over-expression of an ortholog of Arabidopsis IRX8, poplar PoGT8D, in Arabidopsis irx8 mutant could not restore xylan synthesis. The functions of tree GT8D genes remain unclear. We identified two GT8 gene homologs, PtrGT8D1 and PtrGT8D2, in Populus trichocarpa. They are the only two GT8D members and are abundantly and specifically expressed in the differentiating xylem of P. trichocarpa. PtrGT8D1 transcript abundance was >7 times that of PtrGT8D2. To elucidate the genetic function of GT8D in P. trichocarpa, the expression of PtrGT8D1 and PtrGT8D2 was simultaneously knocked down through RNAi. Four transgenic lines had 85-94% reduction in transcripts of PtrGT8D1 and PtrGT8D2, resulting in 29-36% reduction in stem wood xylan content. Xylan reduction had essentially no effect on cellulose quantity but caused an 11-25% increase in lignin. These transgenics exhibit a brittle wood phenotype, accompanied by increased vessel diameter and thinner fiber cell walls in stem xylem. Stem modulus of elasticity and modulus of rupture were reduced by 17-29% and 16-23%, respectively, and were positively correlated with xylan content but negatively correlated with lignin quantity. These results suggest that PtrGT8Ds play key roles in xylan biosynthesis in wood. Xylan may be a more important factor than lignin affecting the stiffness and fracture strength of wood.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Li</LastName><ForeName>Quanzi</ForeName><Initials>Q</Initials><AffiliationInfo><Affiliation>Forest Biotechnology Group, Department of Forestry and Environmental Resources, North Carolina State University, 840 Main Campus Drive, Raleigh, NC 27695, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Min</LastName><ForeName>Douyong</ForeName><Initials>D</Initials></Author><Author ValidYN="Y"><LastName>Wang</LastName><ForeName>Jack Peng-Yu</ForeName><Initials>JP</Initials></Author><Author ValidYN="Y"><LastName>Peszlen</LastName><ForeName>Ilona</ForeName><Initials>I</Initials></Author><Author ValidYN="Y"><LastName>Horvath</LastName><ForeName>Laszlo</ForeName><Initials>L</Initials></Author><Author ValidYN="Y"><LastName>Horvath</LastName><ForeName>Balazs</ForeName><Initials>B</Initials></Author><Author ValidYN="Y"><LastName>Nishimura</LastName><ForeName>Yufuko</ForeName><Initials>Y</Initials></Author><Author ValidYN="Y"><LastName>Jameel</LastName><ForeName>Hasan</ForeName><Initials>H</Initials></Author><Author ValidYN="Y"><LastName>Chang</LastName><ForeName>Hou-Min</ForeName><Initials>HM</Initials></Author><Author ValidYN="Y"><LastName>Chiang</LastName><ForeName>Vincent L</ForeName><Initials>VL</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013486">Research Support, U.S. Gov't, Non-P.H.S.</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Canada</Country><MedlineTA>Tree Physiol</MedlineTA><NlmUniqueID>100955338</NlmUniqueID><ISSNLinking>0829-318X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D014157">Transcription Factors</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D014990">Xylans</NameOfSubstance></Chemical><Chemical><RegistryNumber>EC 2.4.-</RegistryNumber><NameOfSubstance UI="D016695">Glycosyltransferases</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="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D002473" MajorTopicYN="N">Cell Wall</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D015536" MajorTopicYN="N">Down-Regulation</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D055119" MajorTopicYN="N">Elastic Modulus</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018506" MajorTopicYN="N">Gene Expression Regulation, Plant</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D017343" MajorTopicYN="N">Genes, Plant</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014644" MajorTopicYN="N">Genetic Variation</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D016695" MajorTopicYN="N">Glycosyltransferases</DescriptorName><QualifierName UI="Q000235" MajorTopicYN="Y">genetics</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018547" MajorTopicYN="N">Plant Stems</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D030821" MajorTopicYN="N">Plants, Genetically Modified</DescriptorName><QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><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="D013314" MajorTopicYN="N">Stress, Mechanical</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014157" MajorTopicYN="N">Transcription Factors</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014934" MajorTopicYN="N">Wood</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="N">analysis</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014990" MajorTopicYN="N">Xylans</DescriptorName><QualifierName UI="Q000096" MajorTopicYN="Y">biosynthesis</QualifierName><QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2011</Year><Month>4</Month><Day>1</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2011</Year><Month>4</Month><Day>1</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2011</Year><Month>9</Month><Day>13</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">21450982</ArticleId><ArticleId IdType="pii">tpr008</ArticleId><ArticleId IdType="doi">10.1093/treephys/tpr008</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Caroline du Nord</li></region></list><tree><noCountry><name sortKey="Chang, Hou Min" sort="Chang, Hou Min" uniqKey="Chang H" first="Hou-Min" last="Chang">Hou-Min Chang</name><name sortKey="Chiang, Vincent L" sort="Chiang, Vincent L" uniqKey="Chiang V" first="Vincent L" last="Chiang">Vincent L. Chiang</name><name sortKey="Horvath, Balazs" sort="Horvath, Balazs" uniqKey="Horvath B" first="Balazs" last="Horvath">Balazs Horvath</name><name sortKey="Horvath, Laszlo" sort="Horvath, Laszlo" uniqKey="Horvath L" first="Laszlo" last="Horvath">Laszlo Horvath</name><name sortKey="Jameel, Hasan" sort="Jameel, Hasan" uniqKey="Jameel H" first="Hasan" last="Jameel">Hasan Jameel</name><name sortKey="Min, Douyong" sort="Min, Douyong" uniqKey="Min D" first="Douyong" last="Min">Douyong Min</name><name sortKey="Nishimura, Yufuko" sort="Nishimura, Yufuko" uniqKey="Nishimura Y" first="Yufuko" last="Nishimura">Yufuko Nishimura</name><name sortKey="Peszlen, Ilona" sort="Peszlen, Ilona" uniqKey="Peszlen I" first="Ilona" last="Peszlen">Ilona Peszlen</name><name sortKey="Wang, Jack Peng Yu" sort="Wang, Jack Peng Yu" uniqKey="Wang J" first="Jack Peng-Yu" last="Wang">Jack Peng-Yu Wang</name></noCountry><country name="États-Unis"><region name="Caroline du Nord"><name sortKey="Li, Quanzi" sort="Li, Quanzi" uniqKey="Li Q" first="Quanzi" last="Li">Quanzi Li</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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