Figure 3Simulation results are depicted in gray for Ruler, pink for Timer and red for Sizer models (n=30 simulated root files, each). Data from individual cortex tissue files in Col-0 is in green (n=30, day 6 post germination (Tables EV1, EV2)). Parameter values for the models (Table EV3) selected such that no statistical significance is found between model (for each model) and cortex data in any of the five phenotypic traits depicted in A (Wilcoxon-rank sum test, p-value >0.01, Table EV4). For each model, the simulated roots and cells differ in the threshold value for cell elongation termination, the cell elongation rate, the meristematic activity and the initial cell length (Table EV3). The parameter values are the same for the three models except for the threshold for cell elongation termination, which is specific of each model and has relative variability of 40% (Ruler), 3% (Timer) and 32% (Sizer) (Table EV3). A. Boxplots for five phenotypic traits: elongation factor rEZ, mature cell length (length of the EZ cell closest to the DZ) lmax, length of the elongation zone LEZ , number of cells in the elongation zone NEZ and root growth rate. For the cortex Col-0 data, the first four phenotypic traits are all measured in the same root files (n=30, day 6 post germination), while the rootgrowth rate is measured on a different set of roots (n=22, Methods). The Ruler and Timer models drive larger variability in the root growth rate. B-D. Relationships between pairs of the phenotypic traits depicted in A. Panels from left to right: the Ruler, Timer and Sizer models, and cortex Col-0 data. Symbols in the three left-most panels represent simulated data of individual simulated root files (gray triangles for Ruler, pink squares for Timer and red diamonds for Sizer, n=30 each). Data from individual cortex files in Col-0 is in green circles (n=30). Dashed lines are minimum square linear fits. Pearson correlation coefficient (r) for each pair of data are indicated. p stands for the p-value using standard Pearson correlation test. Continuos lines as in Fig. 2 C-E but for the corresponding parameter values (Table EV3). B-D. Relationships between pairs of the phenotypic traits depicted in A. Panels from left to right: the Ruler, Timer and Sizer models, and cortex Col-0 data. Symbols in the three left-most panels represent simulated data of individual simulated root files (gray triangles for Ruler, pink squares for Timer and red diamonds for Sizer, n=30 each). Data from individual cortex files in Col-0 is in green circles (n=30). Dashed lines are minimum square linear fits. Pearson correlation coefficient (r) for each pair of data are indicated. p stands for the p-value using standard Pearson correlation test. Continuos lines as in Fig. 2 C-E but for the corresponding parameter values (Table EV3). B-D. Relationships between pairs of the phenotypic traits depicted in A. Panels from left to right: the Ruler, Timer and Sizer models, and cortex Col-0 data. Symbols in the three left-most panels represent simulated data of individual simulated root files (gray triangles for Ruler, pink squares for Timer and red diamonds for Sizer, n=30 each). Data from individual cortex files in Col-0 is in green circles (n=30). Dashed lines are minimum square linear fits. Pearson correlation coefficient (r) for each pair of data are indicated. p stands for the p-value using standard Pearson correlation test. Continuos lines as in Fig. 2 C-E but for the corresponding parameter values (Table EV3).