Figure 1.

BRI1 receptor occupancy is linked to root growth. A, Visualization of root-promoting and -inhibitory effects of BL on root growth at 4, 6, and 8 DAG. The medium was supplemented with 1 μm BRZ, after which increasing amounts of BL were added. Error bars represent se for 30 roots per data point measured in three independent replicates. The model is able to fit the predicted root length with the experimental data set. B, Model predictions of E_max and R(0,0,t) at 4, 6, and 8 DAG. The model was fit to the measured root length of seedlings at 4, 6, and 8 DAG.