A BRC1-modulated switch in auxin efflux accounts for the competition between Arabidopsis axillary buds
Fig 6
Variation in two model parameters, representing BRC1 expression and PIN1 removal, captures variation in the maximum growth rate of buds on 2-node explants for a range of genotypes and treatments.
(A) Heatmap of the maximum growth rate for 25,281 combinations of parameters v0 and μ (159 × 159 grid). The pixel color intensity reflects the mean maximum growth rate from 50 simulations run over 120 time steps. The genotypes/treatments are assigned the same parameter values as in Fig 4B (iii and iv). (B) Simulated maximum growth rate for each of the genotypes indicated in panel A. The maximum growth rate was calculated from 100 simulations run for 120 time steps. (C) maximum growth rate calculated from the same dataset as Fig 4A. In the left-hand plot, buds were measured for 12 days, except smxl678 which was measured for 19 days. In the right-hand plot, all buds were measured for 10 days, n = 12–72. The series of genotypes/treatment with a gradual increase in BRC1/v0 and PIN1 removal/µ are shown in light blue. Data and simulations are shown for the longest bud of active explants. Letters represent statistically significant differences for p < 0.05 from a multi-level model with pairwise comparisons and Bonferroni correction. Data and scripts of simulations underlying this figure can be found at https://doi.org/10.17863/CAM.120831.
doi: https://doi.org/10.1371/journal.pbio.3003395.g006