Figure 1.
Time courses of location and dimensions of sections harvested in root-tip labeling experiments. Displacement velocities and strain rates (see Fig. 4A) for roots at high (−0.02 MPa) (A) or low (−1.6 MPa) (B) ψw were used to calculate the section of the root tip that encompassed the same tissue at each sampling time. At all time points, the apical section was entirely within the region of the root that had high Pro deposition rates at low ψw (Fig. 4B) and the basal section was in the region that had negative or zero Pro deposition rates at low ψw (see Fig. 4B). Harvesting times were 10, 30, 60, and 120 min after the start of labeling. Displacement immediately behind the root cap (a distance of 0 mm from the root apex in this figure) was negligible during the time frame of these experiments.