Plant Water Uptake in Drying Soils

Lobet, Guillaume; Couvreur, Valentin; Meunier, Félicien; Javaux, Mathieu; Draye, Xavier

doi:10.1104/pp.113.233486

Cited by 140 publications

(100 citation statements)

References 121 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…( Bruckler et al, 1991;Schroeder et al, 2009;Lobet et al, 2014). Root shrinking under high evaporative demand might also decrease root-soil contact and generate air gaps that can decrease the effective conductance between soil and root (Huck et al, 1970;Faiz and Weatherley, 1982).…”

Section: Physiological Control Of Hydraulic Conductance From Roots Tomentioning

confidence: 99%

“…This behavior is mediated by the regulation of the activity of plasma membrane intrinsic proteins (PIPs) (Cochard et al, 2007;Vandeleur et al, 2014). Conversely, the hydraulic conductivity in the rhizosphere most often decreases by several orders of magnitude when the plant water demand increases, due to local soil water depletion around roots during the day even in wet (but unsaturated) soil VZJ | Advancing Critical Zone Science p. 5 of 10( Bruckler et al, 1991;Schroeder et al, 2009;Lobet et al, 2014). Root shrinking under high evaporative demand might also decrease root-soil contact and generate air gaps that can decrease the effective conductance between soil and root (Huck et al, 1970;Faiz and Weatherley, 1982).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Root Water Uptake and Ideotypes of the Root System: Whole‐Plant Controls Matter

Tardieu

Javaux

2017

Vadose Zone Journal

Self Cite

View full text Add to dashboard Cite

Simulations of plant water uptake in soil science are based on the interplay between soil and root properties, with an imposed flux or water potential at the stem base. The dialogue between roots and shoots is important in water uptake. The threshold soil water potential for water uptake represents the soil water potential at which stomatal control stops transpiration over 24 h. Measurements show that it has a large variability among species and cultivars. Isohydric plants prevent low leaf water potentials via stomatal control, so their threshold soil water potential is high. Anisohydric plants allow low leaf water potentials, resulting in lower thresholds. These behaviors have a genetic control and can be simulated via whole-plant models. In studied species, the hydraulic conductance in roots and shoots depends on the whole-plant transpiration rate. In particular, there is a "dialogue" between the daily alternations in the transpiration rate and the circadian oscillations in root hydraulic conductance that affect the hydraulic conductance of the rhizosphere, with appreciable consequences on water uptake. Root traits such as length, branching, or depth interact with shoot traits such as leaf area or stomatal control, thereby generating feedbacks. As a consequence, optimum root systems for water uptake at a given time are not always those associated with the best yields. Models that take these whole-plant results into account bring an extra level of complication but are probably indispensable whenever the aim is to optimize root traits in view of improved drought tolerance.Abbreviations: ABA, abscisic acid; PIP, plasma membrane intrinsic protein; PRD, partial root drying.The root system is the first actor for plant water uptake through its spatial architecture and the distribution of hydraulic conductance along root axes and branching orders. As a consequence, most models of water uptake are based on a dialogue between soil and root hydraulic properties, with an imposed flux or water potential at the base of the stem considered as the boundary of the system (Gardner, 1960;Nimah and Hanks, 1973;Feddes et al., 1976). This has resulted in models that couple soil water depletion and root water uptake (Doussan et al., 2006;Javaux et al., 2008;Schneider et al., 2010). The rationale for imposing boundary conditions at the stem base is that the water flux though the plant is primarily controlled by stomatal conductance. Indeed, the latter is several orders of magnitudes lower than any hydraulic conductance in the soil or in the plant even when stomata are fully opened. This can be visualized in plants that have defective stomatal control and wilt even under well-watered conditions (Borel et al., 2001;Dodd et al., 2009). Furthermore, root hydraulic conductance has no effect on transpiration when it is manipulated via chemical compounds (Ehlert et al., 2009).However, transpiration is controlled via feedbacks involving both roots and shoots, namely chemical and/or hydraulic messages in the short term and soil water depletio...

show abstract

Section: Physiological Control Of Hydraulic Conductance From Roots Tomentioning

confidence: 99%

mentioning

confidence: 99%

Root Water Uptake and Ideotypes of the Root System: Whole‐Plant Controls Matter

Tardieu

Javaux

2017

Vadose Zone Journal

Self Cite

View full text Add to dashboard Cite

show abstract

“…At this point, the atmospheric demand for water is hardly met and stomata close, reducing the plant transpiration and photosynthesis. To investigate when such limitation occurs, the complex plantsoilatmosphere system is often conceptualised as a multidimensional hydraulic network, in which both soil and root hydraulic properties may substantially control shoot water supply [10][11][12] .…”

Section: State Variablementioning

confidence: 99%

“…The FSPM structural input consists of an explicit representation of the root architecture (see Root system architecture section and the related previous case study). Together with the root system geometry, hydraulic properties define the root system hydraulic architecture [11] and are critical for water stress determination [66,67] .…”

mentioning

confidence: 99%

Connecting the dots between computational tools to analyse soil-root water relations

Passot

Couvreur

Meunier

et al. 2018

Preprint

Self Cite

View full text Add to dashboard Cite

In the recent years, many computational tools, such as image analysis, data management, processbased simulation and upscaling tools, were developed to help quantify and understand water flow in the soilroot system, at multiple scales (tissue, organ, plant and population). Several of these tools work together or, at least, are compatible. However, for the uninformed researcher, they might seem disconnected, forming a unclear and disorganised succession of tools.In this article, we present how different pieces of work can be further developed by connecting them to analyse soilrootwater relations in a comprehensive and structured network. This "explicit network of soilroot computational tools" informs the reader about existing tools and help them understand how their data (past and future) might fit within the network. We also demonstrate the novel possibilities of scaleconsistent parameterizations made possible by the network with a set of case studies from the literature. Finally, we discuss existing gaps in the network and how we can move forward to fill them.. CC-BY 4.0 International license It is made available under a was not peer-reviewed) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity.The copyright holder for this preprint (which . http://dx.doi.org/10.1101/312918 doi: bioRxiv preprint first posted online May. 9, 2018; Passot, Couvreur, Meunier et al. 2018 Tools for the analysis of water relations Preprint HighlightsMany computational tools exist to quantify water flow in the soilroot system. These tools can be arranged in a comprehensive network that can be leveraged to better interpret experimental data. KeywordsComputational tools, image analysis, simulation, network, root, soil, water was not peer-reviewed) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity.The copyright holder for this preprint (which . http://dx.doi.org/10.1101/312918 doi: bioRxiv preprint first posted online May. 9, 2018; Passot, Couvreur, Meunier et al. 2018 Tools for the analysis of water relations Preprint Glossary TermDefinition Reference Standard Uptake FractionRelative distribution of root water uptake between root segments when water is equally available in space (units: %)[1]High pressure flow meter Device designed to measure the root system conductance by perfusing pressurized water into a root system opposite from the natural direction of the transpiration stream[2]Root pressure probe Device designed to measure the hydraulic conductance of a single root through variations of water pressure and flow at the cut end of a root [3] Cell pressure probe Device designed to measure the hydraulic conductivity of the membranes of a single plant cell by observing the relaxation time of water pressure pulses applied to the cell Upscaled property System property that is an output of the model, at a higher scale than the input parameters. For instance, the root radial conductivity is an upscaled property of models of root organ water f...

show abstract

“…Water uptake by plants underground roots has been the subject of several studies [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. These works, taking into account mainly the relationships between roots and soil water, have shown that the motor responsible of water uptake by the roots is the gradient of the water potential.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Atmospheric Humidity Uptake by the Aerial Roots of Plants

Alexis¹,

Basile²,

Kouchade³

2017

PLANT

View full text Add to dashboard Cite

Abstract:The mobilization of water by the plant is one of the main challenges of the moment given the threats of food insecurity whose main cause is climate change. The atmosphere contains moisture at any time of the year in the arid or semiarid zone. Apart from the underground roots naturally possessed by many plants, there are plants which possess exclusively or not aerial roots. In the search for methods of adapting crops to water stress, it is imperative to deepen knowledge about interaction between atmospheric humidity and the aerial roots of plants with respect to water absorption. Assuming transfer coefficients of the aerial roots homogeneous and taking into account the variability of the water potential of atmospheric humidity, simulations showed that relative air humidity, root size, and radial and axial transfer coefficients strongly influence radial and axial flows and therefore the amount of water absorbed by the roots.

show abstract

Plant Water Uptake in Drying Soils

Cited by 140 publications

References 121 publications

Root Water Uptake and Ideotypes of the Root System: Whole‐Plant Controls Matter

Root Water Uptake and Ideotypes of the Root System: Whole‐Plant Controls Matter

Connecting the dots between computational tools to analyse soil-root water relations

Simulation of Atmospheric Humidity Uptake by the Aerial Roots of Plants

Contact Info

Product

Resources

About