Leaf proteome analysis of eight Populus × euramericana genotypes: genetic variation in drought response and in water-use efficiency involves photosynthesis-related proteins
| hal.structure.identifier | Arbres et Réponses aux Contraintes Hydriques et Environnementales [ARCHE] | |
| dc.contributor.author | BONHOMME, Ludovic | |
| hal.structure.identifier | Biodiversité, Gènes & Communautés [BioGeCo] | |
| dc.contributor.author | VINCENT, Delphine | |
| hal.structure.identifier | Arbres et Réponses aux Contraintes Hydriques et Environnementales [ARCHE] | |
| dc.contributor.author | CARPIN, Sabine | |
| hal.structure.identifier | Biodiversité, Gènes & Communautés [BioGeCo] | |
| dc.contributor.author | PLOMION, Christophe | |
| hal.structure.identifier | Arbres et Réponses aux Contraintes Hydriques et Environnementales [ARCHE] | |
| dc.contributor.author | BRIGNOLAS, Franck | |
| hal.structure.identifier | Arbres et Réponses aux Contraintes Hydriques et Environnementales [ARCHE] | |
| dc.contributor.author | MORABITO, Domenico | |
| dc.date.issued | 2010 | |
| dc.date.conference | 2010-09-20 | |
| dc.description.abstractEn | Climatic events predicted for this century should involve drier and warmer summers, such as those that occurred in 2003 and 2005 in France. The higher temperatures could become a limiting factor for the regeneration of Populus nigra L. species. During establishment and development in summer period, seedlings must be able to resist high temperatures (until 57.8°C on sand on a Loire island in July 2009). Therefore, maintaining a high transpiration rate (E) for leaf cooling (and therefore a high stomatal conductance to water vapour (gs)), may be a prerequisite for seedlings to survive under high temperatures. To test this hypothesis, we used bulk leaf carbon isotope discrimination (Δ) as a time-integrated index of gas exchange activity (Farquhar et al. 1989). The objectives of this study were (1) to explore the genetic variability of ∆ among P. nigra seedlings from different female trees coming from contrasting sites and (2) the plasticity in response to two contrasting temperatures. Seeds from 16 open-pollinated females originating from the Loire river (France) and from the Paglia river (Italy) were first grown during 7 weeks in two growth chambers at 25°C. At this time (t0), one chamber remained at 25°C and in the second one, the temperature progressively increased until 43°C until the first symptoms of wilting appeared (t1). At t0, an important genetic variability for ∆ (∆t0 25°C) was measured ranged from 24.0‰ to 28.0‰ in both chambers, but no provenances differences were detected. At t1, an important genetic variability for ∆t1 25°C and ∆t1 43°C was observed ranged from 22.0‰ to 26.0‰ in each chamber and a significant provenance effect was detected. At t1, ∆t1 43°C values were significantly higher (0.5‰) than ∆t1 25°C. Moreover, a significant correlation was detected between the ∆t1 43°C values and the symptoms of wilting seedlings, seedlings totally healthy exhibiting higher ∆t1 43°C values. We conclude, under the hypothesis that ∆ is mainly controlled by gs, as already reported in poplar species (Monclus et al. 2006), maintaining high E and therefore high ∆ may enable seedlings to survive under high temperature. | |
| dc.language.iso | en | |
| dc.subject | DISCRIMINATION ISOTOPIQUE DU CARBONE | |
| dc.subject | EFFICIENCE D'UTILISATION DE L'EAU | |
| dc.subject | CHAMBRE DE CROISSANCE | |
| dc.subject | TRANSPIRATION | |
| dc.subject | PEUPLIER NOIR | |
| dc.subject.en | BLACK POPLAR | |
| dc.subject.en | CLIMATIC CHANGE | |
| dc.subject.en | CARBON ISOTOPE DISCRIMINATION | |
| dc.subject.en | GENETIC VARIABILITY | |
| dc.subject.en | SEEDLING | |
| dc.subject.en | GROWTH CHAMBER | |
| dc.subject.en | WATER-USE EFFICIENCY | |
| dc.subject.en | TEMPERATURE | |
| dc.title.en | Leaf proteome analysis of eight Populus × euramericana genotypes: genetic variation in drought response and in water-use efficiency involves photosynthesis-related proteins | |
| dc.type | Communication dans un congrès | |
| dc.subject.hal | Sciences du Vivant [q-bio] | |
| bordeaux.country | IT | |
| bordeaux.conference.city | Orvieto | |
| bordeaux.peerReviewed | non | |
| hal.identifier | hal-02754742 | |
| hal.version | 1 | |
| hal.invited | oui | |
| hal.conference.end | 2010-09-25 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-02754742v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2010&rft.au=BONHOMME,%20Ludovic&VINCENT,%20Delphine&CARPIN,%20Sabine&PLOMION,%20Christophe&BRIGNOLAS,%20Franck&rft.genre=unknown |
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