Fig. 1From: Quantitative monitoring of paramagnetic contrast agents and their allocation in plant tissues via DCE-MRIStructure of the stem in barley by light microscopy and MRI. A The fragment of the stem with leaf and spike at the top. B Light microscopic section through the stem. Numerous vascular bundles of different sizes are clearly visible (arrowed) in the parenchyma tissue of stem. C The structure of a single vascular bundle showing the localization of phloem and xylem inside of the vascular bundle. D NMR image shows an axial cross section through the stem. E NMR-based model showing the 3D arrangement of vascular bundles (blue) inside the stemBack to article page