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Arabidopsis plants acclimate to water deficit at low cost through changes of carbon usage: an integrated perspective using growth, metabolite, enzyme, and gene expression analysis Inra
Hummel, I.; Pantin, F.; Sulpice, R.; Piques, M.; Rolland, G.; Dauzat, M.; Christophe, A.; Pervent, M.; Bouteillé, M.; Stitt, M.; Gibon, Y.; Muller, B..
Growth and carbon (C) fluxes are severely altered in plants exposed to soil water deficit. Correspondingly, it has been suggested that plants under water deficit suffer from C shortage. In this study, we test this hypothesis in Arabidopsis (Arabidopsis thaliana) by providing an overview of the responses of growth, C balance, metabolites, enzymes of the central metabolism, and a set of sugar-responsive genes to a sustained soil water deficit. The results show that under drought, rosette relative expansion rate is decreased more than photosynthesis, leading to a more positive C balance, while root growth is promoted. Several soluble metabolites accumulate in response to soil water deficit, with K+ and organic acids as the main contributors to osmotic...
Tipo: Journal Article Palavras-chave:  .
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010b164e296&uri=/notices/prodinra1/2010/12/
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Molecular bases of acclimation to water deficit in poplar mature leaves Inra
Cohen, D.; Hummel, I.; Balzergue, S.; Magniette, M.L.; Tisserant, E.; Le Thiec, D.; Dreyer, E.; Renou, J.P.; Bogeat, M.B..
In temperate zones the global change will include a decrease of summer precipitations inducing longer and more severe drought episodes. Transcriptional regulation plays a major role in regulating many biological processes, we looked for gene expression networks related to drought stress. The final aim is to identify candidate genes for water deficit acclimation and/or adaptation in poplar, a model tree species. The transcriptome of two Populus deltoides x nigra genotypes of contrasted tolerance to water deficit (Carpaccio and Soligo) were analysed in young mature leaves, at various stages and intensities of stress. Four watering treatments were applied: control (CTL) watered to field capacity six-times a day; early response to water deficit (EAR): watering...
Tipo: Meeting Paper Palavras-chave: MOLECULAR; WATER DEFICIT; POPLAR .
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009e68e7beb&uri=/notices/prodinra1/2010/11/
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Monitoring the regulation of gene expression in a growing organ using a fluid mechanics formalism Inra
Merret, R.; Moulia, B.; Hummel, I.; Cohen, D.; Dreyer, E.; Bogeat, M.B..
Background: Technological advances have enabled the accurate quantification of gene expression, even within single cell types. While transcriptome analyses are routinely performed, most experimental designs only provide snapshots of gene expression. Molecular mechanisms underlying cell fate or positional signalling have been revealed through these discontinuous datasets. However, in developing multicellular structures, temporal and spatial cues, known to directly influence transcriptional networks, get entangled as the cells are displaced and expand. Access to an unbiased view of the spatiotemporal regulation of gene expression occurring duringdevelopment requires a specific framework that properly quantifies the rate of change of a property in a moving...
Tipo: Journal Article Palavras-chave: POPULUS DELTOIDES × NIGRA CV 'SOLIGO'); GENE EXPRESSION; MONITORING; REAL-TIME POLYMERASE CHAIN REACTION; KINEMATICS; GROWTH REGULATION; VELOCITY; RNA.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011c2f24ced&uri=/notices/prodinra1/2011/01/
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POPSEC : molecular bases of acclimation to water deficit in poplar Inra
Bogeat, M.B.; Cohen, D.; Le Thiec, D.; Balzergue, S.; Magniette, M.L.; Renou, J.P.; Label, P.; Lesage-Descauses, M.C.; Laurans, F.; Bourgait, I.; Dejardin, A.; Leplé, J.C.; Morabito, D.; Bonhomme, L.; Brignolas, F.; Vincent, D.; Plomion, C.; Hummel, I..
Tipo: Meeting Paper Palavras-chave: POPULUS DELTOIDES X NIGRA.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201125bb676b&uri=/notices/prodinra1/2011/05/
Registros recuperados: 4
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