File:Magnetic resonance images and projections illustrating the spatial distribution of different root traits in 2D panels - Plphys v170 3 1176 f6.jpg

English: Magnetic resonance images and projections illustrating the spatial distribution of different root traits in 2D panels. A, Magnetic resonance image with shadow effects illustrating the 3D structure of the root system of a barley plant (13 DAS). The scheme at the bottom illustrates how an angular projection was performed. B, The resulting 2D image obtained after angular projection of (A). C, A standard MIP image of an older barley root system (38 DAS). At this stage of development, the spatial distribution of the roots is hard to grasp and (D) shows the angular projection of the root system visualizing the radial distribution of the roots. E, F, G, H, I, J, K, L, M, N, O, The 2D radial distribution (E, G, J, L, N) and 1D depth distribution (F, H, K, M, O) of values of various root traits are presented for five barley plants grown in pots with 81 mm i.d. and 300 mm height and measured at 38 DAS. E, G, J, L, N, Mean values (n = 5) of the radial distribution of different traits for which the data were binned to 5 × 5 mm2. F, H, K, M, O, Mean values ± sd (n = 5) of depth distribution of the traits is shown for which the data were binned to 5 mm slices in the vertical direction. E, F, Root mass density; G, H, root length density; J, K, Root tip density; L, M, mean root angle relative to soil surface; and N, O, mean root diameter.