[1062] - Magnetic Resonance Imaging Techniques for Visualization of Root Growth and Root Water Uptake Processes

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Pohlmeier, A., Haber-Pohlmeier, S., Javaux, M., Vereecken, H., 2013. Magnetic Resonance Imaging Techniques for Visualization of Root Growth and Root Water Uptake Processes. In: Stephen H. Anderson and Jan W. Hopmans (Eds.): Soil–Water–Root Processes: Advances in Tomography and Imaging. Soil Science Society of America, Madison, 135 - 154. DOI: 10.2136/sssaspecpub61.c7.
Title(s):Main Title: Magnetic Resonance Imaging Techniques for Visualization of Root Growth and Root Water Uptake Processes
Description(s):Abstract: Root growth and water uptake processes in the subsurface are hard to observe due to the opaque nature of soil. Classical methods are either invasive or restricted to model setups like two-dimensional rhizoboxes and transparent media. Therefore, during the past two decades, non-invasive methods for monitoring root-soil processes have become popular. Among these, Magnetic Resonance Imaging (MRI) is the most versatile one. It allows one to visualize root features like anatomy and root system architecture, water content distribution in the surrounding soil, and tracer movements in soil and roots. In this article, the principles of MRI are introduced first, followed by a short description of necessary hardware components. The third section reviews investigations of root systems and water uptake patterns in soils using MRI and discusses the effect of experimental parameters. In the fourth section, the usage of contrast agents for the investigation of root water processes is demonstrated. This also includes recent own results on the visualization of transport processes in root soil systems using GdDTPA as MRI contrast agent. At the example of maize (Zea Mays L.) and lupin (Lupinus albus L.) in natural sand we can show that this tracer is enriched in the cortex region under high transpiration rate conditions, but is also transported upward. The fifth section is an outlook to special MRI methods for a direct determination of flow velocities and MRI sequences with ultra-short detection time which are convenient for water content determination in porous media with fast relaxation times like soils with high clay contents.
Identifier(s):DOI: 10.2136/sssaspecpub61.c7
Responsible Party
Creator(s):Author: Andreas Pohlmeier
Author: Sabina Haber-Pohlmeier
Author: Mathieu Javaux
Author: Harry Vereecken
Publisher:Soil Science Society of America
TR32 Topic:Soil
Subject(s):CRC/TR32 Keywords: RWU, MRI, Water, Root Growth
File Details
File Name:Pohlmeier_et_al_SSSA_2013.pdf
Data Type:Text
Size(s):20 Pages
File Size:4853 kB (4.739 MB)
Date(s):Available: 2013-07-30
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
Licence:TR32DB Data policy agreement
North:-no map data
Measurement Region:None
Measurement Location:--None--
Specific Informations - Publication
Type:Book Section
Book Title:Soil–Water–Root Processes: Advances in Tomography and Imaging
Book Editor:Stephen H. Anderson and Jan W. Hopmans
Number Of Pages:20
Page Range:135 - 154
Metadata Details
Metadata Creator:Tanja Kramm
Metadata Created:2014-09-18
Metadata Last Updated:2014-09-18
Funding Phase:2
Metadata Language:English
Metadata Version:V40
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