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A unified framework for plant adaptive strategies to drought : across scales and disciplines
- Source :
- Global Change Biology, Global Change Biology, Wiley, 2018, 24, pp.2929-2938. ⟨10.1111/gcb.14062⟩
- Publication Year :
- 2018
- Publisher :
- HAL CCSD, 2018.
-
Abstract
- Plant adaptation to drought has been extensively studied at many scales from ecology to molecular biology across a large range of model species. However, the conceptual frameworks underpinning the definition of plant strategies, and the terminology used across the different disciplines and scales are not analogous. 'Drought resistance' for instance refers to plant responses as different as the maintenance of growth and productivity in crops, to the survival and recovery in perennial woody or grassland species. Therefore, this paper aims to propose a unified conceptual framework of plant adaptive strategies to drought based on a revised terminology in order to enhance comparative studies. Ecological strategies encapsulate plant adaptation to multidimensional variation in resource variability but cannot account for the dynamic and short-term responses to fluctuations in water availability. Conversely, several plant physiological strategies have been identified along the mono-dimensional gradient of water availability in a given environment. According to a revised terminology, dehydration escape, dehydration avoidance, dehydration tolerance, dormancy, and desiccation tolerance are clearly distinguishable. Their sequential expression is expressed as water deficit increases while cavitation tolerance is proposed here to be a major hydraulic strategy underpinning adaptive responses to drought of vascular plants. This continuum of physiological strategies can be interpreted in the context of the ecological trade-off between water-acquisition vs. water-conservation, since growth maintenance is associated with fast water use under moderate drought while plant survival after growth cessation is associated with slow water use under severe drought. Consequently, the distinction between 'drought resistance' and 'drought survival', is emphasized as crucial to ensure a correct interpretation of plant strategies since 'knowing when not to grow' does not confer 'drought resistance' but may well enhance 'drought survival'. This framework proposal should improve cross-fertilization between disciplines to help tackle the increasing worldwide challenges that drought poses to plant adaptation.
- Subjects :
- Crops, Agricultural
0106 biological sciences
Adaptive strategies
déshydratation
Resource (biology)
Survival
Resistance
Context (language use)
Biology
functional ecology
Models, Biological
010603 evolutionary biology
01 natural sciences
Desiccation tolerance
écologie fonctionnelle
stratégie d'adaptation
Environmental Chemistry
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
drying
Desiccation
adaptation des plantes
Plant Physiological Phenomena
General Environmental Science
2. Zero hunger
Global and Planetary Change
Functional ecology
Cavitation
Ecology
Resistance (ecology)
Dehydration
business.industry
Environmental resource management
fungi
dessication
Water
food and beverages
15. Life on land
Adaptation, Physiological
Droughts
résistance à la sécheresse
Conceptual framework
13. Climate action
Avoidance
Adaptation
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
business
Tolerance
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 13541013 and 13652486
- Database :
- OpenAIRE
- Journal :
- Global Change Biology, Global Change Biology, Wiley, 2018, 24, pp.2929-2938. ⟨10.1111/gcb.14062⟩
- Accession number :
- edsair.doi.dedup.....932c88051a4f9acf2ea36d29ee308a3a