Fig. 2. Temporal variation in mitotic activity in SAMs. (A) Raw data on the number of dividing cells in the L1 layer of four different SAMs (SAM1-SAM4) imaged at 6-hour intervals. In case of SAM2, the data were analyzed only until interval 14 and in case of SAM3 and SAM4 only until interval 11. (B) Data from a plant imaged every 12 hours. (C) Comparison of cell division activity in the L1 layer with that in the L2 layer and corpus of the same plant, imaged every 1 hour and 15 minutes. The number of cell divisions within each time interval is presented. The time at the beginning of the experiment and the cell division marker used are indicated in each case. In each case, note the differences in y-axis dimension, which represents number of cell divisions.