Coordination of stem and leaf traits define different strategies to regulate water loss and tolerance ranges to aridity

Autor: Brendan Choat, Francisco Javier Cano, Rosana López, Nicolas Martin-StPaul, Hervé Cochard
Přispěvatelé: Universidad Politécnica de Madrid (UPM), Hawkesbury Institute for the Environment [Richmond] (HIE), Western Sydney University, Ecologie des Forêts Méditerranéennes (URFM), 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), This work was funded by a Marie Curie Fellowship from the EU-FP7 under grant agreement no. IOF-624473. Brendan Choat was supported by an Australian Research Council Future Fellowship (FT130101115)., European Project: 624473,EC:FP7:PEOPLE,FP7-PEOPLE-2013-IOF,HYDROPIT(2015)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: New Phytologist
New Phytologist, Wiley, 2021, 230 (2), pp.497-509. ⟨10.1111/nph.17185⟩
New Phytologist, 2021, 230 (2), pp.497-509. ⟨10.1111/nph.17185⟩
ISSN: 0028-646X
1469-8137
DOI: 10.1111/nph.17185⟩
Popis: International audience; Adaptation to drought involves complex interactions of traits that vary within and among species. To date, few data are available to quantify within-species variation in functional traits and they are rarely integrated into mechanistic models to improve predictions of species response to climate change.We quantified intraspecific variation in functional traits of two Hakea species growing along an aridity gradient in southeastern Australia. Measured traits were later used to parameterise the model SurEau to simulate a transplantation experiment to identify the limits of drought tolerance.Embolism resistance varied between species but not across populations. Instead, populations adjusted to drier conditions via contrasting sets of trait trade-offs that facilitated homeostasis of plant water status. The species from relatively mesic climate, Hakea dactyloides, relied on tight stomatal control whereas the species from xeric climate, Hakea leucoptera dramatically increased Huber value and leaf mass per area, while leaf area index (LAI) and epidermal conductance (g(min)) decreased. With trait variability, SurEau predicts the plasticity of LAI and g(min) buffers the impact of increasing aridity on population persistence.Knowledge of within-species variability in multiple drought tolerance traits will be crucial to accurately predict species distributional limits.
Databáze: OpenAIRE
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