Handle URI:
http://hdl.handle.net/10754/597258
Title:
A dual porosity model of nutrient uptake by root hairs
Authors:
Zygalakis, K. C.; Kirk, G. J. D.; Jones, D. L.; Wissuwa, M.; Roose, T.
Abstract:
Summary: • 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.
Citation:
Zygalakis 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.
Publisher:
Wiley-Blackwell
Journal:
New Phytologist
KAUST Grant Number:
KUK-C1-013-04
Issue Date:
9-Aug-2011
DOI:
10.1111/j.1469-8137.2011.03840.x
PubMed ID:
21827499
Type:
Article
ISSN:
0028-646X
Sponsors:
K.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.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorZygalakis, K. C.en
dc.contributor.authorKirk, G. J. D.en
dc.contributor.authorJones, D. L.en
dc.contributor.authorWissuwa, M.en
dc.contributor.authorRoose, T.en
dc.date.accessioned2016-02-25T12:29:11Zen
dc.date.available2016-02-25T12:29:11Zen
dc.date.issued2011-08-09en
dc.identifier.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.en
dc.identifier.issn0028-646Xen
dc.identifier.pmid21827499en
dc.identifier.doi10.1111/j.1469-8137.2011.03840.xen
dc.identifier.urihttp://hdl.handle.net/10754/597258en
dc.description.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.en
dc.description.sponsorshipK.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.en
dc.publisherWiley-Blackwellen
dc.subjectMathematicalmodelen
dc.subjectNutrient uptakeen
dc.subjectPhosphateen
dc.subjectRhizosphereen
dc.subjectRoot hairsen
dc.titleA dual porosity model of nutrient uptake by root hairsen
dc.typeArticleen
dc.identifier.journalNew Phytologisten
dc.contributor.institutionUniversity of Oxford, Oxford, United Kingdomen
dc.contributor.institutionCranfield University, Cranfield, United Kingdomen
dc.contributor.institutionBangor University, Bangor, United Kingdomen
dc.contributor.institutionJapan International Research Center for Agricultural Sciences, Tsukuba, Japanen
dc.contributor.institutionUniversity of Southampton, Southampton, United Kingdomen
kaust.grant.numberKUK-C1-013-04en

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