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On the pivotal role of water potential to model plant physiological processes

Tom De Swaef, Olivier Pieters (UGent) , Simon Appeltans, Irene Borra-Serrano, Willem Coudron (UGent) , Valentin Couvreur, Sarah Garré, Peter Lootens, Bart Nicolaï, Leroi Pols, et al.
(2022) IN SILICO PLANTS. 4(1).
Author
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Abstract
Water potential explains water transport in the Soil-Plant-Atmosphere Continuum (SPAC), and is gaining interest as connecting variable between ‘pedo-, bio- and atmosphere’. It is primarily used to simulate hydraulics in the SPAC, and is thus essential for studying drought effects. Recent implementations of hydraulics in large-scale Terrestrial Biosphere Models (TBMs) improved their performance under water-limited conditions, while hydraulic features of recent detailed Functional-Structural Plant Models (FSPMs) open new possibilities for dissecting complex traits for drought tolerance. These developments in models across scales deserve a critical appraisal to evaluate its potential for wider use in FSPMs, but also in crop systems models (CSMs), where hydraulics are currently still absent. After refreshing the physical basis, we first address models where water potential is primarily used for describing water transport along the transpiration pathway from the soil to the leaves, through the roots, the xylem and the leaf mesophyll. Then, we highlight models for three ecophysiological processes, which have well-recognised links to water potential: phloem transport, stomatal conductance and organ growth. We identify water potential as the bridge between soil, root and shoot models, as the physiological variable integrating below- and above-ground abiotic drivers, but also as the link between water status and growth. Models making these connections enable identifying crucial traits for ecosystem resilience to drought and for breeding towards improved drought tolerance in crops. Including hydraulics often increases model complexity, and thus requires experimental data on soil and plant hydraulics. Nevertheless, modelling hydraulics is insightful at different scales (FSPMs, CSMs and TBMs).
Keywords
Plant Science, Agronomy and Crop Science, Biochemistry, Genetics and Molecular Biology (miscellaneous), Modeling and Simulation, crop model, drought stress, FSPM, plant hydraulics, plant growth, stomatal conductance, STEM DIAMETER VARIATIONS, LEAF HYDRAULIC DECLINE, VAPOR-PRESSURE DEFICIT, SAP FLOW, STOMATAL CONDUCTANCE, PHLOEM TRANSPORT, FRUIT-GROWTH, PHOTOSYNTHESIS MODEL, XYLEM VULNERABILITY, EVAPORATIVE DEMAND

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MLA
De Swaef, Tom, et al. “On the Pivotal Role of Water Potential to Model Plant Physiological Processes.” IN SILICO PLANTS, vol. 4, no. 1, 2022, doi:10.1093/insilicoplants/diab038.
APA
De Swaef, T., Pieters, O., Appeltans, S., Borra-Serrano, I., Coudron, W., Couvreur, V., … wyffels, F. (2022). On the pivotal role of water potential to model plant physiological processes. IN SILICO PLANTS, 4(1). https://doi.org/10.1093/insilicoplants/diab038
Chicago author-date
De Swaef, Tom, Olivier Pieters, Simon Appeltans, Irene Borra-Serrano, Willem Coudron, Valentin Couvreur, Sarah Garré, et al. 2022. “On the Pivotal Role of Water Potential to Model Plant Physiological Processes.” IN SILICO PLANTS 4 (1). https://doi.org/10.1093/insilicoplants/diab038.
Chicago author-date (all authors)
De Swaef, Tom, Olivier Pieters, Simon Appeltans, Irene Borra-Serrano, Willem Coudron, Valentin Couvreur, Sarah Garré, Peter Lootens, Bart Nicolaï, Leroi Pols, Clément Saint Cast, Jakub Šalagovič, Maxime Van Haeverbeke, Michiel Stock, and Francis wyffels. 2022. “On the Pivotal Role of Water Potential to Model Plant Physiological Processes.” IN SILICO PLANTS 4 (1). doi:10.1093/insilicoplants/diab038.
Vancouver
1.
De Swaef T, Pieters O, Appeltans S, Borra-Serrano I, Coudron W, Couvreur V, et al. On the pivotal role of water potential to model plant physiological processes. IN SILICO PLANTS. 2022;4(1).
IEEE
[1]
T. De Swaef et al., “On the pivotal role of water potential to model plant physiological processes,” IN SILICO PLANTS, vol. 4, no. 1, 2022.
@article{8734695,
  abstract     = {{Water potential explains water transport in the Soil-Plant-Atmosphere Continuum (SPAC), and is gaining interest as connecting variable between ‘pedo-, bio- and atmosphere’. It is primarily used to simulate hydraulics in the SPAC, and is thus essential for studying drought effects. Recent implementations of hydraulics in large-scale Terrestrial Biosphere Models (TBMs) improved their performance under water-limited conditions, while hydraulic features of recent detailed Functional-Structural Plant Models (FSPMs) open new possibilities for dissecting complex traits for drought tolerance. These developments in models across scales deserve a critical appraisal to evaluate its potential for wider use in FSPMs, but also in crop systems models (CSMs), where hydraulics are currently still absent. After refreshing the physical basis, we first address models where water potential is primarily used for describing water transport along the transpiration pathway from the soil to the leaves, through the roots, the xylem and the leaf mesophyll. Then, we highlight models for three ecophysiological processes, which have well-recognised links to water potential: phloem transport, stomatal conductance and organ growth. We identify water potential as the bridge between soil, root and shoot models, as the physiological variable integrating below- and above-ground abiotic drivers, but also as the link between water status and growth. Models making these connections enable identifying crucial traits for ecosystem resilience to drought and for breeding towards improved drought tolerance in crops. Including hydraulics often increases model complexity, and thus requires experimental data on soil and plant hydraulics. Nevertheless, modelling hydraulics is insightful at different scales (FSPMs, CSMs and TBMs).}},
  articleno    = {{diab038}},
  author       = {{De Swaef, Tom and Pieters, Olivier and Appeltans, Simon and Borra-Serrano, Irene and Coudron, Willem and Couvreur, Valentin and Garré, Sarah and Lootens, Peter and Nicolaï, Bart and Pols, Leroi and Saint Cast, Clément and Šalagovič, Jakub and Van Haeverbeke, Maxime and Stock, Michiel and wyffels, Francis}},
  issn         = {{2517-5025}},
  journal      = {{IN SILICO PLANTS}},
  keywords     = {{Plant Science,Agronomy and Crop Science,Biochemistry,Genetics and Molecular Biology (miscellaneous),Modeling and Simulation,crop model,drought stress,FSPM,plant hydraulics,plant growth,stomatal conductance,STEM DIAMETER VARIATIONS,LEAF HYDRAULIC DECLINE,VAPOR-PRESSURE DEFICIT,SAP FLOW,STOMATAL CONDUCTANCE,PHLOEM TRANSPORT,FRUIT-GROWTH,PHOTOSYNTHESIS MODEL,XYLEM VULNERABILITY,EVAPORATIVE DEMAND}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{28}},
  title        = {{On the pivotal role of water potential to model plant physiological processes}},
  url          = {{http://doi.org/10.1093/insilicoplants/diab038}},
  volume       = {{4}},
  year         = {{2022}},
}
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