Thresholds for persistent leaf photochemical damage predict plant drought resilience in a tropical rainforest
FORTUNEL, Claire
Botanique et Modélisation de l'Architecture des Plantes et des Végétations [UMR AMAP]
Voir plus >
Botanique et Modélisation de l'Architecture des Plantes et des Végétations [UMR AMAP]
FORTUNEL, Claire
Botanique et Modélisation de l'Architecture des Plantes et des Végétations [UMR AMAP]
Botanique et Modélisation de l'Architecture des Plantes et des Végétations [UMR AMAP]
DERROIRE, Géraldine
Ecologie des forêts de Guyane [UMR ECOFOG]
Département Environnements et Sociétés [Cirad-ES]
Ecologie des forêts de Guyane [UMR ECOFOG]
Département Environnements et Sociétés [Cirad-ES]
LEVIONNOIS, Sébastien
Botanique et Modélisation de l'Architecture des Plantes et des Végétations [UMR AMAP]
Ecologie des forêts de Guyane [UMR ECOFOG]
Botanique et Modélisation de l'Architecture des Plantes et des Végétations [UMR AMAP]
Ecologie des forêts de Guyane [UMR ECOFOG]
MARÉCHAUX, Isabelle
Botanique et Modélisation de l'Architecture des Plantes et des Végétations [UMR AMAP]
Botanique et Modélisation de l'Architecture des Plantes et des Végétations [UMR AMAP]
HÉRAULT, Bruno
Forêts et Sociétés [UPR Forêts et Sociétés]
Département Environnements et Sociétés [Cirad-ES]
Institut National Polytechnique Félix Houphouët-Boigny [Yamoussoukro] [INP-HB]
Forêts et Sociétés [UPR Forêts et Sociétés]
Département Environnements et Sociétés [Cirad-ES]
Institut National Polytechnique Félix Houphouët-Boigny [Yamoussoukro] [INP-HB]
HEURET, Patrick
Botanique et Modélisation de l'Architecture des Plantes et des Végétations [UMR AMAP]
< Réduire
Botanique et Modélisation de l'Architecture des Plantes et des Végétations [UMR AMAP]
Langue
en
Article de revue
Ce document a été publié dans
New Phytologist. 2023-07-01, vol. 239, n° 2, p. 576-591
Wiley
Résumé en anglais
Water stress can cause declines in plant function that persist after rehydration. Recent work has defined ‘resilience’ traits characterizing leaf resistance to persistent damage from drought, but whether these traits predict ...Lire la suite >
Water stress can cause declines in plant function that persist after rehydration. Recent work has defined ‘resilience’ traits characterizing leaf resistance to persistent damage from drought, but whether these traits predict resilience in whole-plant function is unknown. It is also unknown whether the coordination between resilience and ‘resistance’ – the ability to maintain function during drought – observed globally occurs within ecosystems. For eight rainforest species, we dehydrated and subsequently rehydrated leaves, and measured water stress thresholds for declines in rehydration capacity and maximum quantum yield of photosystem II (Fv/Fm). We tested correlations with embolism resistance and dry season water potentials (ΨMD), and calculated safety margins for damage (ΨMD – thresholds) and tested correlations with drought resilience in sap flow and growth. Ψ thresholds for persistent declines in Fv/Fm, indicating resilience, were positively correlated with ΨMD and thresholds for leaf vein embolism. Safety margins for persistent declines in Fv/Fm, but not rehydration capacity, were positively correlated with drought resilience in sap flow.Correlations between resistance and resilience suggest that species' differences in performance during drought are perpetuated after drought, potentially accelerating shifts in forest composition. Resilience to photochemical damage emerged as a promising functional trait to characterize whole-plant drought resilience.< Réduire
Mots clés en anglais
Drought
Embolism resistance
Hydraulics
Photochemistry
Recovery
Rehydration
Tropical
Drought
Project ANR
CEnter of the study of Biodiversity in Amazonia
Origine
Importé de halUnités de recherche