Coordination of stem and leaf traits define different strategies to regulate water loss and tolerance ranges to aridity.
SurEau model
drought
embolism resistance
intraspecific variation
leaf economic spectrum plant hydraulics
tree mortality
Journal
The New phytologist
ISSN: 1469-8137
Titre abrégé: New Phytol
Pays: England
ID NLM: 9882884
Informations de publication
Date de publication:
04 2021
04 2021
Historique:
received:
12
08
2020
accepted:
31
12
2020
pubmed:
17
1
2021
medline:
15
5
2021
entrez:
16
1
2021
Statut:
ppublish
Résumé
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
Substances chimiques
Water
059QF0KO0R
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
497-509Informations de copyright
© 2021 The Authors. New Phytologist © 2021 New Phytologist Foundation.
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