Table 1.

Average number of mitoses on cross sections (10 μm thick) of the exposed and the opposite side of the root (quoted from Gurwitsch, 1988).

	% of cells in mitosis
	Exposed side	Opposite side	Difference
Outside of the range of exposure	54.25 ± 16.77	54 ± 16.99	0.25 ± 3.97
Exposed part	65.60 ± 8.38	47.50 ± 7.45	17.83 ± 6.91
Outside of the range of exposure	42.86 ± 8.60	43.05 ± 8.75	−0.18±3.16