Downregulation of high-isoelectric-point extracellular superoxide dismutase mediates alterations in the metabolism of reactive oxygen species and developmental disturbances in hybrid aspen.
Identifieur interne : 003C07 ( Main/Exploration ); précédent : 003C06; suivant : 003C08Downregulation of high-isoelectric-point extracellular superoxide dismutase mediates alterations in the metabolism of reactive oxygen species and developmental disturbances in hybrid aspen.
Auteurs : Vaibhav Srivastava [Suède] ; Helga Schinkel ; Johanna Witzell ; Magnus Hertzberg ; Mikaela Torp ; Manoj Kumar Srivastava ; Barbara Karpinska ; Michael Melzer ; Gunnar WingsleSource :
- The Plant journal : for cell and molecular biology [ 0960-7412 ] ; 2007.
Descripteurs français
- KwdFr :
- Analyse de profil d'expression de gènes (MeSH), Données de séquences moléculaires (MeSH), Espèces réactives de l'oxygène (métabolisme), Hybridation génétique (MeSH), Lignine (métabolisme), Phylogenèse (MeSH), Phénotype (MeSH), Point isoélectrique (MeSH), Populus (croissance et développement), Populus (enzymologie), Populus (génétique), Populus (métabolisme), Protéines végétales (génétique), Protéines végétales (métabolisme), Régulation de l'expression des gènes au cours du développement (MeSH), Régulation de l'expression des gènes végétaux (MeSH), Régulation négative (MeSH), Superoxide dismutase (composition chimique), Superoxide dismutase (métabolisme), Séquence d'acides aminés (MeSH), Tiges de plante (cytologie), Tiges de plante (métabolisme), Végétaux génétiquement modifiés (MeSH).
- MESH :
- composition chimique : Superoxide dismutase.
- croissance et développement : Populus.
- cytologie : Tiges de plante.
- enzymologie : Populus.
- génétique : Populus, Protéines végétales.
- métabolisme : Espèces réactives de l'oxygène, Lignine, Populus, Protéines végétales, Superoxide dismutase, Tiges de plante.
- Analyse de profil d'expression de gènes, Données de séquences moléculaires, Hybridation génétique, Phylogenèse, Phénotype, Point isoélectrique, Régulation de l'expression des gènes au cours du développement, Régulation de l'expression des gènes végétaux, Régulation négative, Séquence d'acides aminés, Végétaux génétiquement modifiés.
English descriptors
- KwdEn :
- Amino Acid Sequence (MeSH), Down-Regulation (MeSH), Gene Expression Profiling (MeSH), Gene Expression Regulation, Developmental (MeSH), Gene Expression Regulation, Plant (MeSH), Hybridization, Genetic (MeSH), Isoelectric Point (MeSH), Lignin (metabolism), Molecular Sequence Data (MeSH), Phenotype (MeSH), Phylogeny (MeSH), Plant Proteins (genetics), Plant Proteins (metabolism), Plant Stems (cytology), Plant Stems (metabolism), Plants, Genetically Modified (MeSH), Populus (enzymology), Populus (genetics), Populus (growth & development), Populus (metabolism), Reactive Oxygen Species (metabolism), Superoxide Dismutase (chemistry), Superoxide Dismutase (metabolism).
- MESH :
- chemical , chemistry : Superoxide Dismutase.
- chemical , genetics : Plant Proteins.
- chemical , metabolism : Lignin, Plant Proteins, Reactive Oxygen Species, Superoxide Dismutase.
- cytology : Plant Stems.
- enzymology : Populus.
- genetics : Populus.
- growth & development : Populus.
- metabolism : Plant Stems, Populus.
- Amino Acid Sequence, Down-Regulation, Gene Expression Profiling, Gene Expression Regulation, Developmental, Gene Expression Regulation, Plant, Hybridization, Genetic, Isoelectric Point, Molecular Sequence Data, Phenotype, Phylogeny, Plants, Genetically Modified.
Abstract
Transgenic hybrid aspen (Populus tremula L. x P. tremuloides Michx.) plants expressing a high-isoelectric-point superoxide dismutase (hipI-SOD) gene in antisense orientation were generated to investigate its function. Immunolocalization studies showed the enzyme to be localized extracellularly, in the secondary cell wall of xylem vessels and phloem fibers. The antisense lines of hipI-SOD exhibited a distinct phenotype; growth rate was reduced, stems were thinner and leaves smaller than in wild-type (WT) plants. The abundance of hipI-SOD was reduced in the bark and xylem of plants from these antisense lines. The vascular tissue of transgenic lines became lignified earlier than in WT plants and also showed an increased accumulation of reactive oxygen species (ROS). Xylem fibers and vessels were shorter and thinner in the transgenic lines than in WT plants. The total phenolic content was enhanced in the antisense lines. Furthermore, microarray analysis indicated that several enzymes involved in cell signaling, lignin biosynthesis and stress responses were upregulated in apical vascular tissues of transgenic plants. The upregulation of selected genes involved in lignin biosynthesis was also verified by real-time PCR. The results suggest that, in the transgenic plants, a premature transition into maturation occurs and the process is discussed in terms of the effects of increased accumulation of ROS due to reduced expression of hipI-SOD during development and differentiation.
DOI: 10.1111/j.1365-313X.2006.02943.x
PubMed: 17233796
Affiliations:
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sort="Srivastava, Vaibhav" uniqKey="Srivastava V" first="Vaibhav" last="Srivastava">Vaibhav Srivastava</name><affiliation wicri:level="1"><nlm:affiliation>Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden.</nlm:affiliation><country xml:lang="fr">Suède</country><wicri:regionArea>Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 901 83 Umeå</wicri:regionArea><wicri:noRegion>901 83 Umeå</wicri:noRegion></affiliation></author><author><name sortKey="Schinkel, Helga" sort="Schinkel, Helga" uniqKey="Schinkel H" first="Helga" last="Schinkel">Helga Schinkel</name></author><author><name sortKey="Witzell, Johanna" sort="Witzell, Johanna" uniqKey="Witzell J" first="Johanna" last="Witzell">Johanna Witzell</name></author><author><name sortKey="Hertzberg, Magnus" sort="Hertzberg, Magnus" uniqKey="Hertzberg M" first="Magnus" last="Hertzberg">Magnus Hertzberg</name></author><author><name sortKey="Torp, Mikaela" sort="Torp, Mikaela" uniqKey="Torp M" first="Mikaela" last="Torp">Mikaela Torp</name></author><author><name sortKey="Srivastava, Manoj Kumar" sort="Srivastava, Manoj Kumar" uniqKey="Srivastava M" first="Manoj Kumar" last="Srivastava">Manoj Kumar Srivastava</name></author><author><name sortKey="Karpinska, Barbara" sort="Karpinska, Barbara" uniqKey="Karpinska B" first="Barbara" last="Karpinska">Barbara Karpinska</name></author><author><name sortKey="Melzer, Michael" sort="Melzer, Michael" uniqKey="Melzer M" first="Michael" last="Melzer">Michael Melzer</name></author><author><name sortKey="Wingsle, Gunnar" sort="Wingsle, Gunnar" uniqKey="Wingsle G" first="Gunnar" last="Wingsle">Gunnar Wingsle</name></author></analytic><series><title level="j">The Plant journal : for cell and molecular biology</title><idno type="ISSN">0960-7412</idno><imprint><date when="2007" type="published">2007</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Amino Acid Sequence (MeSH)</term><term>Down-Regulation (MeSH)</term><term>Gene Expression Profiling (MeSH)</term><term>Gene Expression Regulation, Developmental (MeSH)</term><term>Gene Expression Regulation, Plant (MeSH)</term><term>Hybridization, Genetic (MeSH)</term><term>Isoelectric Point (MeSH)</term><term>Lignin (metabolism)</term><term>Molecular Sequence Data (MeSH)</term><term>Phenotype (MeSH)</term><term>Phylogeny (MeSH)</term><term>Plant Proteins (genetics)</term><term>Plant Proteins (metabolism)</term><term>Plant Stems (cytology)</term><term>Plant Stems (metabolism)</term><term>Plants, Genetically Modified (MeSH)</term><term>Populus (enzymology)</term><term>Populus (genetics)</term><term>Populus (growth & development)</term><term>Populus (metabolism)</term><term>Reactive Oxygen Species (metabolism)</term><term>Superoxide Dismutase (chemistry)</term><term>Superoxide Dismutase (metabolism)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Analyse de profil d'expression de gènes (MeSH)</term><term>Données de séquences moléculaires (MeSH)</term><term>Espèces réactives de l'oxygène (métabolisme)</term><term>Hybridation génétique (MeSH)</term><term>Lignine (métabolisme)</term><term>Phylogenèse (MeSH)</term><term>Phénotype (MeSH)</term><term>Point isoélectrique (MeSH)</term><term>Populus (croissance et développement)</term><term>Populus (enzymologie)</term><term>Populus (génétique)</term><term>Populus (métabolisme)</term><term>Protéines végétales (génétique)</term><term>Protéines végétales (métabolisme)</term><term>Régulation de l'expression des gènes au cours du développement (MeSH)</term><term>Régulation de l'expression des gènes végétaux (MeSH)</term><term>Régulation négative (MeSH)</term><term>Superoxide dismutase (composition chimique)</term><term>Superoxide dismutase (métabolisme)</term><term>Séquence d'acides aminés (MeSH)</term><term>Tiges de plante (cytologie)</term><term>Tiges de plante (métabolisme)</term><term>Végétaux génétiquement modifiés (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Superoxide Dismutase</term></keywords><keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en"><term>Plant Proteins</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Lignin</term><term>Plant Proteins</term><term>Reactive Oxygen Species</term><term>Superoxide Dismutase</term></keywords><keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr"><term>Superoxide dismutase</term></keywords><keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="cytologie" xml:lang="fr"><term>Tiges de plante</term></keywords><keywords scheme="MESH" qualifier="cytology" xml:lang="en"><term>Plant Stems</term></keywords><keywords scheme="MESH" qualifier="enzymologie" xml:lang="fr"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="enzymology" xml:lang="en"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Populus</term><term>Protéines végétales</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Stems</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Espèces réactives de l'oxygène</term><term>Lignine</term><term>Populus</term><term>Protéines végétales</term><term>Superoxide dismutase</term><term>Tiges de plante</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Amino Acid Sequence</term><term>Down-Regulation</term><term>Gene Expression Profiling</term><term>Gene Expression Regulation, Developmental</term><term>Gene Expression Regulation, Plant</term><term>Hybridization, Genetic</term><term>Isoelectric Point</term><term>Molecular Sequence Data</term><term>Phenotype</term><term>Phylogeny</term><term>Plants, Genetically Modified</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Analyse de profil d'expression de gènes</term><term>Données de séquences moléculaires</term><term>Hybridation génétique</term><term>Phylogenèse</term><term>Phénotype</term><term>Point isoélectrique</term><term>Régulation de l'expression des gènes au cours du développement</term><term>Régulation de l'expression des gènes végétaux</term><term>Régulation négative</term><term>Séquence d'acides aminés</term><term>Végétaux génétiquement modifiés</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Transgenic hybrid aspen (Populus tremula L. x P. tremuloides Michx.) plants expressing a high-isoelectric-point superoxide dismutase (hipI-SOD) gene in antisense orientation were generated to investigate its function. Immunolocalization studies showed the enzyme to be localized extracellularly, in the secondary cell wall of xylem vessels and phloem fibers. The antisense lines of hipI-SOD exhibited a distinct phenotype; growth rate was reduced, stems were thinner and leaves smaller than in wild-type (WT) plants. The abundance of hipI-SOD was reduced in the bark and xylem of plants from these antisense lines. The vascular tissue of transgenic lines became lignified earlier than in WT plants and also showed an increased accumulation of reactive oxygen species (ROS). Xylem fibers and vessels were shorter and thinner in the transgenic lines than in WT plants. The total phenolic content was enhanced in the antisense lines. Furthermore, microarray analysis indicated that several enzymes involved in cell signaling, lignin biosynthesis and stress responses were upregulated in apical vascular tissues of transgenic plants. The upregulation of selected genes involved in lignin biosynthesis was also verified by real-time PCR. The results suggest that, in the transgenic plants, a premature transition into maturation occurs and the process is discussed in terms of the effects of increased accumulation of ROS due to reduced expression of hipI-SOD during development and differentiation.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">17233796</PMID><DateCompleted><Year>2007</Year><Month>04</Month><Day>06</Day></DateCompleted><DateRevised><Year>2007</Year><Month>01</Month><Day>19</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0960-7412</ISSN><JournalIssue CitedMedium="Print"><Volume>49</Volume><Issue>1</Issue><PubDate><Year>2007</Year><Month>Jan</Month></PubDate></JournalIssue><Title>The Plant journal : for cell and molecular biology</Title><ISOAbbreviation>Plant J</ISOAbbreviation></Journal><ArticleTitle>Downregulation of high-isoelectric-point extracellular superoxide dismutase mediates alterations in the metabolism of reactive oxygen species and developmental disturbances in hybrid aspen.</ArticleTitle><Pagination><MedlinePgn>135-48</MedlinePgn></Pagination><Abstract><AbstractText>Transgenic hybrid aspen (Populus tremula L. x P. tremuloides Michx.) plants expressing a high-isoelectric-point superoxide dismutase (hipI-SOD) gene in antisense orientation were generated to investigate its function. Immunolocalization studies showed the enzyme to be localized extracellularly, in the secondary cell wall of xylem vessels and phloem fibers. The antisense lines of hipI-SOD exhibited a distinct phenotype; growth rate was reduced, stems were thinner and leaves smaller than in wild-type (WT) plants. The abundance of hipI-SOD was reduced in the bark and xylem of plants from these antisense lines. The vascular tissue of transgenic lines became lignified earlier than in WT plants and also showed an increased accumulation of reactive oxygen species (ROS). Xylem fibers and vessels were shorter and thinner in the transgenic lines than in WT plants. The total phenolic content was enhanced in the antisense lines. Furthermore, microarray analysis indicated that several enzymes involved in cell signaling, lignin biosynthesis and stress responses were upregulated in apical vascular tissues of transgenic plants. The upregulation of selected genes involved in lignin biosynthesis was also verified by real-time PCR. The results suggest that, in the transgenic plants, a premature transition into maturation occurs and the process is discussed in terms of the effects of increased accumulation of ROS due to reduced expression of hipI-SOD during development and differentiation.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Srivastava</LastName><ForeName>Vaibhav</ForeName><Initials>V</Initials><AffiliationInfo><Affiliation>Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Schinkel</LastName><ForeName>Helga</ForeName><Initials>H</Initials></Author><Author ValidYN="Y"><LastName>Witzell</LastName><ForeName>Johanna</ForeName><Initials>J</Initials></Author><Author ValidYN="Y"><LastName>Hertzberg</LastName><ForeName>Magnus</ForeName><Initials>M</Initials></Author><Author ValidYN="Y"><LastName>Torp</LastName><ForeName>Mikaela</ForeName><Initials>M</Initials></Author><Author ValidYN="Y"><LastName>Srivastava</LastName><ForeName>Manoj Kumar</ForeName><Initials>MK</Initials></Author><Author ValidYN="Y"><LastName>Karpinska</LastName><ForeName>Barbara</ForeName><Initials>B</Initials></Author><Author ValidYN="Y"><LastName>Melzer</LastName><ForeName>Michael</ForeName><Initials>M</Initials></Author><Author ValidYN="Y"><LastName>Wingsle</LastName><ForeName>Gunnar</ForeName><Initials>G</Initials></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>England</Country><MedlineTA>Plant J</MedlineTA><NlmUniqueID>9207397</NlmUniqueID><ISSNLinking>0960-7412</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D010940">Plant Proteins</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D017382">Reactive Oxygen Species</NameOfSubstance></Chemical><Chemical><RegistryNumber>9005-53-2</RegistryNumber><NameOfSubstance UI="D008031">Lignin</NameOfSubstance></Chemical><Chemical><RegistryNumber>EC 1.15.1.1</RegistryNumber><NameOfSubstance UI="D013482">Superoxide Dismutase</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000595" MajorTopicYN="N">Amino Acid Sequence</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D015536" MajorTopicYN="Y">Down-Regulation</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D020869" MajorTopicYN="N">Gene Expression Profiling</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018507" MajorTopicYN="N">Gene Expression Regulation, Developmental</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018506" MajorTopicYN="Y">Gene Expression Regulation, Plant</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006824" MajorTopicYN="N">Hybridization, Genetic</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D007526" MajorTopicYN="N">Isoelectric Point</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008031" MajorTopicYN="N">Lignin</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D008969" MajorTopicYN="N">Molecular Sequence Data</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010641" MajorTopicYN="N">Phenotype</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010802" MajorTopicYN="N">Phylogeny</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010940" MajorTopicYN="N">Plant Proteins</DescriptorName><QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018547" MajorTopicYN="N">Plant Stems</DescriptorName><QualifierName UI="Q000166" MajorTopicYN="N">cytology</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D030821" MajorTopicYN="N">Plants, Genetically Modified</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000201" MajorTopicYN="N">enzymology</QualifierName><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="D017382" MajorTopicYN="N">Reactive Oxygen Species</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013482" MajorTopicYN="N">Superoxide Dismutase</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2007</Year><Month>1</Month><Day>20</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2007</Year><Month>4</Month><Day>7</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2007</Year><Month>1</Month><Day>20</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">17233796</ArticleId><ArticleId IdType="pii">TPJ2943</ArticleId><ArticleId IdType="doi">10.1111/j.1365-313X.2006.02943.x</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Suède</li></country></list><tree><noCountry><name sortKey="Hertzberg, Magnus" sort="Hertzberg, Magnus" uniqKey="Hertzberg M" first="Magnus" last="Hertzberg">Magnus Hertzberg</name><name sortKey="Karpinska, Barbara" sort="Karpinska, Barbara" uniqKey="Karpinska B" first="Barbara" last="Karpinska">Barbara Karpinska</name><name sortKey="Melzer, Michael" sort="Melzer, Michael" uniqKey="Melzer M" first="Michael" last="Melzer">Michael Melzer</name><name sortKey="Schinkel, Helga" sort="Schinkel, Helga" uniqKey="Schinkel H" first="Helga" last="Schinkel">Helga Schinkel</name><name sortKey="Srivastava, Manoj Kumar" sort="Srivastava, Manoj Kumar" uniqKey="Srivastava M" first="Manoj Kumar" last="Srivastava">Manoj Kumar Srivastava</name><name sortKey="Torp, Mikaela" sort="Torp, Mikaela" uniqKey="Torp M" first="Mikaela" last="Torp">Mikaela Torp</name><name sortKey="Wingsle, Gunnar" sort="Wingsle, Gunnar" uniqKey="Wingsle G" first="Gunnar" last="Wingsle">Gunnar Wingsle</name><name sortKey="Witzell, Johanna" sort="Witzell, Johanna" uniqKey="Witzell J" first="Johanna" last="Witzell">Johanna Witzell</name></noCountry><country name="Suède"><noRegion><name sortKey="Srivastava, Vaibhav" sort="Srivastava, Vaibhav" uniqKey="Srivastava V" first="Vaibhav" last="Srivastava">Vaibhav Srivastava</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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