KAUST Grant NumberKUK-C1-013-04
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AbstractSummary: • The importance of root hairs in the uptake of sparingly soluble nutrients is understood qualitatively, but not quantitatively, and this limits efforts to breed plants tolerant of nutrient-deficient soils. • Here, we develop a mathematical model of nutrient uptake by root hairs allowing for hair geometry and the details of nutrient transport through soil, including diffusion within and between soil particles. We give illustrative results for phosphate uptake. • Compared with conventional 'single porosity' models, this 'dual porosity' model predicts greater root uptake because more nutrient is available by slow release from within soil particles. Also the effect of soil moisture is less important with the dual porosity model because the effective volume available for diffusion in the soil is larger, and the predicted effects of hair length and density are different. • Consistent with experimental observations, with the dual porosity model, increases in hair length give greater increases in uptake than increases in hair density per unit main root length. The effect of hair density is less in dry soil because the minimum concentration in solution for net influx is reached more rapidly. The effect of hair length is much less sensitive to soil moisture. © 2011 The Authors. New Phytologist © 2011 New Phytologist Trust.
CitationZygalakis KC, Kirk GJD, Jones DL, Wissuwa M, Roose T (2011) A dual porosity model of nutrient uptake by root hairs. New Phytologist 192: 676–688. Available: http://dx.doi.org/10.1111/j.1469-8137.2011.03840.x.
SponsorsK.C.Z. was supported by Award No. KUK-C1-013-04 of the King Abdullah University of Science and Technology (KAUST). T. R. is a Royal Society University Research Fellow.
CollectionsPublications Acknowledging KAUST Support
- A dynamic model of nutrient uptake by root hairs.
- Authors: Leitner D, Klepsch S, Ptashnyk M, Marchant A, Kirk GJ, Schnepf A, Roose T
- Issue date: 2010 Feb
- High resolution synchrotron imaging of wheat root hairs growing in soil and image based modelling of phosphate uptake.
- Authors: Keyes SD, Daly KR, Gostling NJ, Jones DL, Talboys P, Pinzer BR, Boardman R, Sinclair I, Marchant A, Roose T
- Issue date: 2013 Jun
- Root hair length and rhizosheath mass depend on soil porosity, strength and water content in barley genotypes.
- Authors: Haling RE, Brown LK, Bengough AG, Valentine TA, White PJ, Young IM, George TS
- Issue date: 2014 Mar
- Root hair formation in rice (Oryza sativa L.) differs between root types and is altered in artificial growth conditions.
- Authors: Nestler J, Keyes SD, Wissuwa M
- Issue date: 2016 Jun
- Mobilization and acquisition of sparingly soluble P-Sources by Brassica cultivars under P-starved environment II. Rhizospheric pH changes, redesigned root architecture and pi-uptake kinetics.
- Authors: Akhtar MS, Oki Y, Adachi T
- Issue date: 2009 Nov