Fig. 3.

Loss of KRP5 leads to a reduction in cell size in the root. (A) Cortical cell lengths measured from the QC in 10-day-old roots. No difference in cell lengths within the meristem could be detected between krp5-1 and WT, resulting a similar RAM size. Krp5-1 cortical cells in the elongation zone are impaired in growth (n = 50). (B) Histogram of cortical cell lengths from cells in the meristem (cells 1–25 in part A) showing the distribution of cell lengths in WT and krp5-1. (C) The final cell lengths of mature epidermal hair and non-hair cells, cortical cells and endodermal cells were all found to be smaller in krp5-1 compared to WT (n > 100). *** indicates t-test P < 0.001; ** indicates P < 0.01; * indicates P < 0.05. Error bars represent standard error of the mean. (D) Histogram showing the distribution of mature cell lengths of non-hair epidermal cells in WT and krp5-1.