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. 2016 Jul 29;118(4):787–796. doi: 10.1093/aob/mcw126

Fig. 3.

Fig. 3.

Overexpression of XAL1 is sufficient to promote root cell proliferation. (A, B) Meristem size (A) and meristematic cell number (B) are higher in the overexpression lines (XAL1-OE 5.2.5 and XAL1-OE 7.9.1) while xal1-2 has both parameters diminished compared with WT roots at 5 dpg. Data correspond to mean ± s.e. Statistical significance (***P < 0·001, *P < 0·05) was obtained using the Kruskal–Wallis test (n = 30). (C) XAL1-overexpression increases cell divisions at the SCN. Confocal microscopy showing atypical divisions of the QC (arrowheads) and initial cells (labelled cells in the insets) in 50 % of the XAL1-OE 5.2.5 and 7.9.1 plants compared with WT roots. Seedlings of 3 dpg were stained with the pseudo-Schiff technique. n = 35 (WT), 20 (XAL1-OE 5.2.5) and 32 (XAL1-OE 7.9.1) plants. Scale bars = 10 μm.