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Your search keyword '"Havaux, Michel"' showing total 18 results
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18 results on '"Havaux, Michel"'

10. PlantACT! – how to tackle the climate crisis

Author

Hirt, Heribert, primary, Al-Babili, Salim, additional, Almeida-Trapp, Marilia, additional, Martin, Antoine, additional, Aranda, Manuel, additional, Bartels, Dorothea, additional, Bennett, Malcolm, additional, Blilou, Ikram, additional, Boer, Damian, additional, Boulouis, Alix, additional, Bowler, Chris, additional, Brunel-Muguet, Sophie, additional, Chardon, Fabien, additional, Colcombet, Jean, additional, Colot, Vincent, additional, Daszkowska-Golec, Agata, additional, Dinneny, Jose R., additional, Field, Ben, additional, Froehlich, Katja, additional, Gardener, Catherine H., additional, Gojon, Alain, additional, Gomès, Eric, additional, Gomez-Alvarez, Eva María, additional, Gutierrez, Crisanto, additional, Havaux, Michel, additional, Hayes, Scott, additional, Heard, Edith, additional, Hodges, Michael, additional, Alghamdi, Amal Khalaf, additional, Laplaze, Laurent, additional, Lauersen, Kyle J., additional, Leonhardt, Nathalie, additional, Johnson, Xenie, additional, Jones, Jonathan, additional, Kollist, Hannes, additional, Kopriva, Stanislav, additional, Krapp, Anne, additional, Masson, Mauricio Lopez-Portillo, additional, McCabe, Matthew F., additional, Merendino, Livia, additional, Molina, Antonio, additional, Moreno Ramirez, Jose L., additional, Mueller-Roeber, Bernd, additional, Nicolas, Michael, additional, Nir, Ido, additional, Orduna, Izamar Olivas, additional, Pardo, Jose M., additional, Reichheld, Jean-Philippe, additional, Rodriguez, Pedro L., additional, Rouached, Hatem, additional, Saad, Maged M., additional, Schlögelhofer, Peter, additional, Singh, Kirti A., additional, De Smet, Ive, additional, Stanschewski, Clara, additional, Stra, Alice, additional, Tester, Mark, additional, Walsh, Catherine, additional, Weber, Andreas P.M., additional, Weigel, Detlef, additional, Wigge, Philip, additional, Wrzaczek, Michael, additional, Wulff, Brande B.H., additional, and Young, Iain M., additional

Published
2023
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13. A guanosine tetraphosphate (ppGpp) mediated brake on photosynthesis is required for acclimation to nitrogen limitation in Arabidopsis

Author

Romand, Shanna, primary, Abdelkefi, Hela, additional, Lecampion, Cécile, additional, Belaroussi, Mohamed, additional, Dussenne, Melanie, additional, Ksas, Brigitte, additional, Citerne, Sylvie, additional, Caius, Jose, additional, D'Alessandro, Stefano, additional, Fakhfakh, Hatem, additional, Caffarri, Stefano, additional, Havaux, Michel, additional, and Field, Ben, additional

Published
2022
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14. Author response: A guanosine tetraphosphate (ppGpp) mediated brake on photosynthesis is required for acclimation to nitrogen limitation in Arabidopsis

Author

Romand, Shanna, primary, Abdelkefi, Hela, additional, Lecampion, Cécile, additional, Belaroussi, Mohamed, additional, Dussenne, Melanie, additional, Ksas, Brigitte, additional, Citerne, Sylvie, additional, Caius, Jose, additional, D'Alessandro, Stefano, additional, Fakhfakh, Hatem, additional, Caffarri, Stefano, additional, Havaux, Michel, additional, and Field, Ben, additional

Published
2022
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16. A ppGpp-mediated brake on photosynthesis is required for acclimation to nitrogen limitation in Arabidopsis

Author

Romand, Shanna, primary, Abdelkefi, Hela, additional, Lecampion, Cecile, additional, Belaroussi, Mohamed, additional, Dussenne, Melanie, additional, Ksas, Brigitte, additional, Citerne, Sylvie, additional, Caius, José, additional, D’Alessandro, Stefano, additional, Fakhfakh, Hatem, additional, Caffarri, Stefano, additional, Havaux, Michel, additional, and Field, Ben, additional

Published
2021
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17. The response of Arabidopsis to the apocarotenoid β-cyclocitric acid reveals a role for SIAMESE-RELATED 5 in root development and drought tolerance.

Author

Braat J, Jaonina M, David P, Leschevin M, Légeret B, D'Alessandro S, Beisson F, and Havaux M

Abstract

New regulatory functions in plant development and environmental stress responses have recently emerged for a number of apocarotenoids produced by enzymatic or nonenzymatic oxidation of carotenoids. β-Cyclocitric acid (β-CCA) is one such compound derived from β-carotene, which triggers defense mechanisms leading to a marked enhancement of plant tolerance to drought stress. We show here that this response is associated with an inhibition of root growth affecting both root cell elongation and division. Remarkably, β-CCA selectively induced cell cycle inhibitors of the SIAMESE-RELATED (SMR) family, especially SMR5, in root tip cells. Overexpression of the SMR5 gene in Arabidopsis induced molecular and physiological changes that mimicked in large part the effects of β-CCA. In particular, the SMR5 overexpressors exhibited an inhibition of root development and a marked increase in drought tolerance which is not related to stomatal closure. SMR5 up-regulation induced changes in gene expression that strongly overlapped with the β-CCA-induced transcriptomic changes. Both β-CCA and SMR5 led to a down-regulation of many cell cycle activators (cyclins, cyclin-dependent kinases) and a concomitant up-regulation of genes related to water deprivation, cellular detoxification, and biosynthesis of lipid biopolymers such as suberin and lignin. This was correlated with an accumulation of suberin lipid polyesters in the roots and a decrease in nonstomatal leaf transpiration. Taken together, our results identify the β-CCA-inducible and drought-inducible SMR5 gene as a key component of a stress-signaling pathway that reorients root metabolism from growth to multiple defense mechanisms leading to drought tolerance., (© The Author(s) 2023. Published by Oxford University Press on behalf of National Academy of Sciences.)

Published
2023
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18. Determination of ROS-Induced Lipid Peroxidation by HPLC-Based Quantification of Hydroxy Polyunsaturated Fatty Acids.

Author

Ksas B and Havaux M

Subjects
Chromatography, High Pressure Liquid, Lipid Peroxidation, Oxidation-Reduction, Reactive Oxygen Species, Fatty Acids, Fatty Acids, Unsaturated
Abstract

Because they are highly unsaturated, plant lipids are sensitive to oxidation and constitute a primary target of reactive oxygen species. Therefore, quantification of lipid peroxidation provides a pertinent approach to evaluating oxidative stress in plants. Here, we describe a simple method to measure upstream products of the peroxidation of the major polyunsaturated fatty acids in plants, namely, linolenic acid (C18:3) and linoleic acid (C18:2). The method uses conventional HPLC with UV detection to measure hydroxy C18:3 and C18:2 after reduction of their respective hydroperoxides. The described experimental approach requires low amounts of plant material (a few hundred milligrams), monitors oxidation of both membrane and free fatty acids, and can discriminate between enzymatic and non-enzymatic lipid peroxidation., (© 2022. Springer Science+Business Media, LLC, part of Springer Nature.)

Published
2022
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