Responses of poplar to the combination of ozone and drought: special focus on glutathione metabolism
| Autor: | Vaultier, Marie-Noëlle, Dusart, Nicolas, Collignon, Christelle, Gérard, Joëlle, Dizengremel, Pierre, Le Thiec, Didier, Jolivet, Yves |
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| Přispěvatelé: | Ecologie et Ecophysiologie Forestières [devient SILVA en 2018] (EEF), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Global Challenges of Air Pollution and Climate Change to Forests. IUFRO 2015 International congress. Global Challenges of Air Pollution and Climate Change to Forests. IUFRO 2015 International congress., Jun 2015, Nice, France. 2015, IUFRO International Congress GreenInUrbs & IUFRO RG 7.01. Global Challenges of Air Pollution and Climate Change to Forests. 1-5 June 2015, Nice Global Challenges of Air Pollution and Climate Change to Forests. IUFRO 2015 International congress., Jun 2015, Nice, France. 2015 IUFRO International Congress GreenInUrbs & IUFRO RG 7.01. Global Challenges of Air Pollution and Climate Change to Forests. 1-5 June 2015, Nice. . 2015; Global Challenges of Air Pollution and Climate Change to Forests. IUFRO 2015 International congress., Nice, FRA, 2015-06-01-2015-06-05 |
| Popis: | Context . Presently, the impact of drought events on the effect of ozone pollution still needs more investigation. Drought may alleviate the O 3 entrance in the leaf by reducing the stomatal aperture (Matyssek et al ., 2010). However drought by itself also induced changes in cell redox homeostasis and the behaviour of the cell antioxidative charge in case of stress combination (drought and O 3 ) is s till unknown. Aims of the work . Glutathione is well known as antioxidant molecule but also has several roles in plant cell development. In condition of combined stresses (drought and O 3 ), we intend to decipher the response of detoxification mechanisms in relation with glutathione metabolism. Two euramerican poplar genotypes ( Populus deltoides x Populus nigra ), Carpaccio and Robusta , differing in ozone sensitivity and for which differences in detoxification mechanisms have been stated (Dumont et al., 2014), were investigated. Results. We exposed the two poplar genotypes to various treatments for 17 days: a moderate drought, an O 3 fumigation (120 ppb), or the combination of both treatments. Ecophysiological, biochemical and molecular parameters were measured. Both genotypes were drought - tolerant, with higher water use efficiency for Robusta. For this genotype, characterized as ozone - sensitive, gene expression and enzymatic activities of glutathione reductase and dehydroascorbate reductase displayed an early re sponse to oxidative stress. The combined treatment tended to induce nearly an ozone - like response. Conclusions and Perspectives. This work constitutes preliminary results and further analyses are in progress to extend the role of glutathione metabolism in ozone / drought tolerance. This work is supported by the French National Research Agency through the Laboratory of Excellence ARBRE (ANR - 12 - LABXARBRE - 01). |
| Databáze: | OpenAIRE |
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