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001     840435
005     20210129231832.0
024 7 _ |a 10.1002/2017WR020832
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100 1 _ |a Haber-Pohlmeier, Sabine
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245 _ _ |a Quantitative mapping of solute accumulation in a soil-root system by magnetic resonance imaging
260 _ _ |a [New York]
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520 _ _ |a Differential uptake of water and solutes by plant roots generates heterogeneous concentration distributions in soils. Noninvasive observations of root system architecture and concentration patterns therefore provide information about root water and solute uptake. We present the application of magnetic resonance imaging (MRI) to image and monitor root architecture and the distribution of a tracer, GdDTPA2− (Gadolinium-diethylenetriaminepentacetate) noninvasively during an infiltration experiment in a soil column planted with white lupin. We show that inversion recovery preparation within the MRI imaging sequence can quantitatively map concentrations of a tracer in a complex root-soil system. Instead of a simple T1 weighting, the procedure is extended by a wide range of inversion times to precisely map T1 and subsequently to cover a much broader concentration range of the solute. The derived concentrations patterns were consistent with mass balances and showed that the GdDTPA2− tracer represents a solute that is excluded by roots. Monitoring and imaging the accumulation of the tracer in the root zone therefore offers the potential to determine where and by which roots water is taken up.
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700 1 _ |a Vanderborght, J.
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700 1 _ |a Pohlmeier, Andreas
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773 _ _ |a 10.1002/2017WR020832
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856 4 _ |y Published on 2017-08-04. Available in OpenAccess from 2018-02-04.
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856 4 _ |y Published on 2017-08-04. Available in OpenAccess from 2018-02-04.
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