Table IV.

Effects of the water potential of agar blocks applied to the root tip (0.5 mm from root apex) and the elongating region (4 mm from root apex) on the elongation rate of primary roots

Data represent means ± sd (n = 4–5). Letters (a and b) indicate statistically significant differences between treatments (Tukey-Kramer test; P = 0.05).

Water Potential of Agar Blocks		Elongation Rate
0.5 mm	4 mm
Mpa		mm h−1
−0.03	−0.03	1.63 ± 0.31 a
–	−1.60	1.01 ± 0.13 b
−0.03	−1.60	0.98 ± 0.17 b
−1.60	–	1.07 ± 0.31 b
−1.60	−0.03	1.12 ± 0.20 b
−1.60	−1.60	0.80 ± 0.18 b