Environmental and auxin regulation of wood formation involves members of the Aux/IAA gene family in hybrid aspen.
Identifieur interne : 004605 ( Main/Corpus ); précédent : 004604; suivant : 004606Environmental and auxin regulation of wood formation involves members of the Aux/IAA gene family in hybrid aspen.
Auteurs : Richard Moyle ; Jarmo Schrader ; Anneli Stenberg ; Olof Olsson ; Sangeeta Saxena ; Göran Sandberg ; Rishikesh P. BhaleraoSource :
- The Plant journal : for cell and molecular biology [ 0960-7412 ] ; 2002.
English descriptors
- KwdEn :
- Amino Acid Sequence (MeSH), Arabidopsis (genetics), Biomechanical Phenomena (MeSH), Cloning, Molecular (MeSH), Environment (MeSH), Gene Expression Regulation, Developmental (drug effects), Gene Expression Regulation, Plant (drug effects), Hybrid Vigor (genetics), Indoleacetic Acids (pharmacology), Molecular Sequence Data (MeSH), Multigene Family (genetics), Plant Growth Regulators (pharmacology), Plant Leaves (drug effects), Plant Leaves (genetics), Plant Leaves (growth & development), Plant Proteins (genetics), Plant Proteins (metabolism), Salicaceae (drug effects), Salicaceae (genetics), Salicaceae (growth & development), Sequence Homology, Amino Acid (MeSH).
- MESH :
- chemical , genetics : Plant Proteins.
- chemical , metabolism : Plant Proteins.
- chemical , pharmacology : Indoleacetic Acids, Plant Growth Regulators.
- drug effects : Gene Expression Regulation, Developmental, Gene Expression Regulation, Plant, Plant Leaves, Salicaceae.
- genetics : Arabidopsis, Hybrid Vigor, Multigene Family, Plant Leaves, Salicaceae.
- growth & development : Plant Leaves, Salicaceae.
- Amino Acid Sequence, Biomechanical Phenomena, Cloning, Molecular, Environment, Molecular Sequence Data, Sequence Homology, Amino Acid.
Abstract
Indole acetic acid (IAA/auxin) profoundly affects wood formation but the molecular mechanism of auxin action in this process remains poorly understood. We have cloned cDNAs for eight members of the Aux/IAA gene family from hybrid aspen (Populus tremula L. x Populus tremuloides Michx.) that encode potential mediators of the auxin signal transduction pathway. These genes designated as PttIAA1-PttIAA8 are auxin inducible but differ in their requirement of de novo protein synthesis for auxin induction. The auxin induction of the PttIAA genes is also developmentally controlled as evidenced by the loss of their auxin inducibility during leaf maturation. The PttIAA genes are differentially expressed in the cell types of a developmental gradient comprising the wood-forming tissues. Interestingly, the expression of the PttIAA genes is downregulated during transition of the active cambium into dormancy, a process in which meristematic cells of the cambium lose their sensitivity to auxin. Auxin-regulated developmental reprogramming of wood formation during the induction of tension wood is accompanied by changes in the expression of PttIAA genes. The distinct tissue-specific expression patterns of the auxin inducible PttIAA genes in the cambial region together with the change in expression during dormancy transition and tension wood formation suggest a role for these genes in mediating cambial responses to auxin and xylem development.
DOI: 10.1046/j.1365-313x.2002.01386.x
PubMed: 12220260
Links to Exploration step
pubmed:12220260Le document en format XML
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<author><name sortKey="Schrader, Jarmo" sort="Schrader, Jarmo" uniqKey="Schrader J" first="Jarmo" last="Schrader">Jarmo Schrader</name>
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<author><name sortKey="Stenberg, Anneli" sort="Stenberg, Anneli" uniqKey="Stenberg A" first="Anneli" last="Stenberg">Anneli Stenberg</name>
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<author><name sortKey="Olsson, Olof" sort="Olsson, Olof" uniqKey="Olsson O" first="Olof" last="Olsson">Olof Olsson</name>
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<author><name sortKey="Saxena, Sangeeta" sort="Saxena, Sangeeta" uniqKey="Saxena S" first="Sangeeta" last="Saxena">Sangeeta Saxena</name>
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<author><name sortKey="Sandberg, Goran" sort="Sandberg, Goran" uniqKey="Sandberg G" first="Göran" last="Sandberg">Göran Sandberg</name>
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<author><name sortKey="Bhalerao, Rishikesh P" sort="Bhalerao, Rishikesh P" uniqKey="Bhalerao R" first="Rishikesh P" last="Bhalerao">Rishikesh P. Bhalerao</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en">Environmental and auxin regulation of wood formation involves members of the Aux/IAA gene family in hybrid aspen.</title>
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<author><name sortKey="Saxena, Sangeeta" sort="Saxena, Sangeeta" uniqKey="Saxena S" first="Sangeeta" last="Saxena">Sangeeta Saxena</name>
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<author><name sortKey="Bhalerao, Rishikesh P" sort="Bhalerao, Rishikesh P" uniqKey="Bhalerao R" first="Rishikesh P" last="Bhalerao">Rishikesh P. Bhalerao</name>
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<term>Cloning, Molecular (MeSH)</term>
<term>Environment (MeSH)</term>
<term>Gene Expression Regulation, Developmental (drug effects)</term>
<term>Gene Expression Regulation, Plant (drug effects)</term>
<term>Hybrid Vigor (genetics)</term>
<term>Indoleacetic Acids (pharmacology)</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>Multigene Family (genetics)</term>
<term>Plant Growth Regulators (pharmacology)</term>
<term>Plant Leaves (drug effects)</term>
<term>Plant Leaves (genetics)</term>
<term>Plant Leaves (growth & development)</term>
<term>Plant Proteins (genetics)</term>
<term>Plant Proteins (metabolism)</term>
<term>Salicaceae (drug effects)</term>
<term>Salicaceae (genetics)</term>
<term>Salicaceae (growth & development)</term>
<term>Sequence Homology, Amino Acid (MeSH)</term>
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<keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en"><term>Plant Proteins</term>
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<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Plant Proteins</term>
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<keywords scheme="MESH" type="chemical" qualifier="pharmacology" xml:lang="en"><term>Indoleacetic Acids</term>
<term>Plant Growth Regulators</term>
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<keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Gene Expression Regulation, Developmental</term>
<term>Gene Expression Regulation, Plant</term>
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<front><div type="abstract" xml:lang="en">Indole acetic acid (IAA/auxin) profoundly affects wood formation but the molecular mechanism of auxin action in this process remains poorly understood. We have cloned cDNAs for eight members of the Aux/IAA gene family from hybrid aspen (Populus tremula L. x Populus tremuloides Michx.) that encode potential mediators of the auxin signal transduction pathway. These genes designated as PttIAA1-PttIAA8 are auxin inducible but differ in their requirement of de novo protein synthesis for auxin induction. The auxin induction of the PttIAA genes is also developmentally controlled as evidenced by the loss of their auxin inducibility during leaf maturation. The PttIAA genes are differentially expressed in the cell types of a developmental gradient comprising the wood-forming tissues. Interestingly, the expression of the PttIAA genes is downregulated during transition of the active cambium into dormancy, a process in which meristematic cells of the cambium lose their sensitivity to auxin. Auxin-regulated developmental reprogramming of wood formation during the induction of tension wood is accompanied by changes in the expression of PttIAA genes. The distinct tissue-specific expression patterns of the auxin inducible PttIAA genes in the cambial region together with the change in expression during dormancy transition and tension wood formation suggest a role for these genes in mediating cambial responses to auxin and xylem development.</div>
</front>
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<Abstract><AbstractText>Indole acetic acid (IAA/auxin) profoundly affects wood formation but the molecular mechanism of auxin action in this process remains poorly understood. We have cloned cDNAs for eight members of the Aux/IAA gene family from hybrid aspen (Populus tremula L. x Populus tremuloides Michx.) that encode potential mediators of the auxin signal transduction pathway. These genes designated as PttIAA1-PttIAA8 are auxin inducible but differ in their requirement of de novo protein synthesis for auxin induction. The auxin induction of the PttIAA genes is also developmentally controlled as evidenced by the loss of their auxin inducibility during leaf maturation. The PttIAA genes are differentially expressed in the cell types of a developmental gradient comprising the wood-forming tissues. Interestingly, the expression of the PttIAA genes is downregulated during transition of the active cambium into dormancy, a process in which meristematic cells of the cambium lose their sensitivity to auxin. Auxin-regulated developmental reprogramming of wood formation during the induction of tension wood is accompanied by changes in the expression of PttIAA genes. The distinct tissue-specific expression patterns of the auxin inducible PttIAA genes in the cambial region together with the change in expression during dormancy transition and tension wood formation suggest a role for these genes in mediating cambial responses to auxin and xylem development.</AbstractText>
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