Academic Journal
Residual water losses mediate the trade-off between growth and drought survival across saplings of 12 tropical rainforest tree species with contrasting hydraulic strategies
| العنوان: | Residual water losses mediate the trade-off between growth and drought survival across saplings of 12 tropical rainforest tree species with contrasting hydraulic strategies |
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| المؤلفون: | Ziegler, Camille, Cochard, Hervé, Stahl, Clément, Foltzer, Louis, Gérard, Bastien, Gorêt, Jean-Yves, Heuret, Patrick, Levionnois, Sébastien, Maillard, Pascale, Bonal, Damien, Coste, Sabrina |
| المساهمون: | Ecologie des forêts de Guyane (UMR ECOFOG), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-AgroParisTech-Université de Guyane (UG)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), SILVA (SILVA), AgroParisTech-Université de Lorraine (UL)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant (PIAF), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Clermont Auvergne (UCA), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD Occitanie )-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université de Montpellier (UM), Université de Guyane (UG), ANR-11-LABX-0002,ARBRE,Recherches Avancées sur l'Arbre et les Ecosytèmes Forestiers(2011) |
| المصدر: | ISSN: 0022-0957. |
| بيانات النشر: | CCSD Oxford University Press (OUP) |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Drought-induced mortality, Hydraulic failure, Hydraulic strategies, Minimum conductance, Non-structural carbohydrates (NSC), SurEau model, Tropical forests, Xylem embolism, [SDE]Environmental Sciences |
| الوصف: | International audience ; Knowledge of the physiological mechanisms underlying species vulnerability to drought is critical for better understanding patterns of tree mortality. Investigating plant adaptive strategies to drought should thus help to fill this knowledge gap, especially in tropical rainforests exhibiting high functional diversity. In a semi-controlled drought experiment using 12 rainforest tree species, we investigated the diversity in hydraulic strategies and whether they determined the ability of saplings to use stored non-structural carbohydrates during an extreme imposed drought. We further explored the importance of water- and carbon-use strategies in relation to drought survival through a modelling approach. Hydraulic strategies varied considerably across species with a continuum between dehydration tolerance and avoidance. During dehydration leading to hydraulic failure and irrespective of hydraulic strategies, species showed strong declines in whole-plant starch concentrations and maintenance, or even increases in soluble sugar concentrations, potentially favouring osmotic adjustments. Residual water losses mediated the trade-off between time to hydraulic failure and growth, indicating that dehydration avoidance is an effective drought-survival strategy linked to the ‘fast–slow’ continuum of plant performance at the sapling stage. Further investigations on residual water losses may be key to understanding the response of tropical rainforest tree communities to climate change. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | WOS: 001227383300001 |
| DOI: | 10.1093/jxb/erae159 |
| الاتاحة: | https://hal.inrae.fr/hal-04608174 https://doi.org/10.1093/jxb/erae159 |
| رقم الانضمام: | edsbas.E9B412D1 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1093/jxb/erae159 |
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