Imaging of root zone processes using MRI T1 mapping
Imaging of root zone processes using MRI T1 mapping
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DOI：
10.1016/j.micromeso.2017.10.046
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发表时间：
2018-10-01
影响因子：
5.2
通讯作者：
Pohlmeier, Andreas
中科院分区：
文献类型：
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作者：
Haber-Pohlmeier, Sabina;Toetzke, Christian;Pohlmeier, Andreas
在根土室的非侵入性成像是强制性的，以提高知识的根土相互作用和吸收过程，最终控制作物生长和生产力。在这里，我们提出了一种方法的MRI T-1弛豫映射调查吸水模式，并作为第二个例子，结合中子断层扫描（NT），在根际的属性changes. First部分演示了定量溶质富集平流运输到根由于吸水。这种积累被净向下流动和分散扩散所抵消。人们还可以区分高富集区和富集程度低得多的区。这种行为持续了好几天。第二部分提出了新的组合MRI与中子断层扫描耦合静态，质子密度信息的根和他们的界面周围的土壤与当地的水动力学的信息，反映了NMR弛豫时间。蚕豆植物的根土界面的特点是轻微增加MRI和NT信号强度，但减少T-1弛豫时间，表明局部改变土壤性质。
Noninvasive imaging in the root soil compartment is mandatory for improving knowledge about root soil interactions and uptake processes which eventually control crop growth and productivity. Here we propose a method of MRI T-1 relaxation mapping to investigate water uptake patterns, and as second example, in combination with neutron tomography (NT), property changes in the rhizosphere.The first part demonstrates quantification of solute enrichment by advective transport to the roots due to water uptake. This accumulation is counterbalanced by net downward flow and dispersive spreading. One can furthermore discriminate between zones of high accumulation patterns and zones with much less enrichment. This behavior persists over days. The second part presents the novel combination of MRI with neutron tomography to couple static, proton density information of roots and their interface to the surrounding soil with information about the local water dynamics, reflected by NMR relaxation times. The root soil interface of a broad bean plant is characterized by slightly increasing MRI and NT signal intensity but decreasing T-1 relaxation time indicating locally changed soil properties.