Table I.

Change in turgor pressure (MPa) after agar blocks were applied to root tips

Turgor was measured in the epidermis or exodermis. Measurements were made approximately 5 and 20 mm from the root apex for the elongating and mature regions, respectively. Data represent means ± sd (n = 4–8).

Region	Water Potential of Agar Blocks	Time after Start of Treatment
		0.5	2	4
	Mpa		h
Elongating	−0.03	0.47 ± 0.05	0.53 ± 0.03	0.44 ± 0.02
	−1.60	0.42 ± 0.06	0.54 ± 0.03	0.46 ± 0.07
Mature	−0.03	0.44 ± 0.08	0.40 ± 0.05	0.33 ± 0.08
	−1.60	0.39 ± 0.06	0.50 ± 0.02	0.31 ± 0.08