English: Root growth of a maize plant in soil monitored over several days with MRI. A, B, C, D, MRI data acquired at four different growth stages (6, 9, 12, and 15 DAS) are displayed as 2D maximum intensity projections (MIPs). E, F, G, H, shows the same data set as 3D surface renderings with a virtual illumination from the top casting a shadow on the inside of the digitally added pot. For clarity, residual MRI signals that were more than 3.5 mm apart from the root system have been removed in the 3D rendering. Pot size, see Figure 2. Scale bar = 20 mm.