Articles | Volume 20, issue 8
https://doi.org/10.5194/hess-20-3441-2016
https://doi.org/10.5194/hess-20-3441-2016
Research article
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29 Aug 2016
Research article | Highlight paper |  | 29 Aug 2016

A thermodynamic formulation of root water uptake

Anke Hildebrandt, Axel Kleidon, and Marcel Bechmann

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Cited articles

Adiku, S. G. K., Rose, C. W., Braddock, R. D., and Ozier-Lafontaine, H.: On the simulation of root water extraction: examination of a minimum energy hypothesis, Soil Sci., 165, 226–236, https://doi.org/10.1097/00010694-200003000-00005, 2000.
Aroca, R., Porcel, R., and Ruiz-Lozano, J. M.: Regulation of root water uptake under abiotic stress conditions, J. Exp. Bot., 63, 43–57, https://doi.org/10.1093/jxb/err266, 2012.
Bechmann, M., Schneider, C., Carminati, A., Vetterlein, D., Attinger, S., and Hildebrandt, A.: Effect of parameter choice in root water uptake models – the arrangement of root hydraulic properties within the root architecture affects dynamics and efficiency of root water uptake, Hydrol. Earth Syst. Sci., 18, 4189–4206, https://doi.org/10.5194/hess-18-4189-2014, 2014.
Carminati, A., Schneider, C. L., Moradi, A. B., Zarebanadkouki, M., Vetterlein, D., Vogel, H.-J., Hildebrandt, A., Weller, U., Schüler, L., and Oswald, S. E.: How the Rhizosphere May Favor Water Availability to Roots, Vadose Zone J., 10, 988–998, https://doi.org/10.2136/vzj2010.0113, 2011.
Ciocca, F., Lunati, I., and Parlange, M. B.: Effects of the water retention curve on evaporation from arid soils, Geophys. Res. Lett., 41, 3110–3116, https://doi.org/10.1002/2014GL059827, 2014.
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Short summary
This theoretical paper describes the energy fluxes and dissipation along the flow paths involved in root water uptake, an approach that is rarely taken. We show that this provides useful additional insights for understanding the biotic and abiotic impediments to root water uptake. This approach shall be applied to explore efficient water uptake strategies and help locate the limiting processes in the complex soil–plant–atmosphere system.