Incorporating photosynthetic acclimation improves stomatal optimisation models.
carbon assimilation
photosynthetic cost
soil drought
stomatal conductance
stomatal limitation
Journal
Plant, cell & environment
ISSN: 1365-3040
Titre abrégé: Plant Cell Environ
Pays: United States
ID NLM: 9309004
Informations de publication
Date de publication:
08 Apr 2024
08 Apr 2024
Historique:
revised:
04
03
2024
received:
12
10
2023
accepted:
08
03
2024
medline:
9
4
2024
pubmed:
9
4
2024
entrez:
8
4
2024
Statut:
aheadofprint
Résumé
Stomatal opening in plant leaves is regulated through a balance of carbon and water exchange under different environmental conditions. Accurate estimation of stomatal regulation is crucial for understanding how plants respond to changing environmental conditions, particularly under climate change. A new generation of optimality-based modelling schemes determines instantaneous stomatal responses from a balance of trade-offs between carbon gains and hydraulic costs, but most such schemes do not account for biochemical acclimation in response to drought. Here, we compare the performance of six instantaneous stomatal optimisation models with and without accounting for photosynthetic acclimation. Using experimental data from 37 plant species, we found that accounting for photosynthetic acclimation improves the prediction of carbon assimilation in a majority of the tested models. Photosynthetic acclimation contributed significantly to the reduction of photosynthesis under drought conditions in all tested models. Drought effects on photosynthesis could not accurately be explained by the hydraulic impairment functions embedded in the stomatal models alone, indicating that photosynthetic acclimation must be considered to improve estimates of carbon assimilation during drought.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : H2020 European Research Council
Organisme : Schmidt Futures programme
Organisme : National Member Organizations
Organisme : Strategic Initiatives Program of the International Institute for Applied Systems Analysis
Organisme : H2020 Marie Sklodowska-Curie Actions
Organisme : Australian Research Council
Organisme : MICIU/AEI/10.13039/501100011033
Organisme : NextGenerationEU/PRTR
Informations de copyright
© 2024 John Wiley & Sons Ltd.
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