Table IV.

The effect of various inorganic and organic inhibitors of cation channels on Na⁺ influx into 12-d-old excised roots of Arabidopsis

Values represent mean ± se (n = 18 for controls, n = 6 for all other treatments). FM, Fresh mass.

Treatment	Na+ Influx	Percentage Change Relative to Controla
	μmol g−1 FM min−1
Control (0.2 mM Ca2+)	1.88 ± 0.12
5 mM CsCl	1.91 ± 0.28
10 mM TEA-Cl	1.70 ± 0.10
1 mM BaCl2	1.36 ± 0.05	−28
1 mM ZnCl2	1.53 ± 0.13
1 mM GdCl3	1.60 ± 0.16
1 mM LaCl3	2.51 ± 0.16	+34
0.1 mM Verapamil	1.53 ± 0.15
0.1 mM Amiloride	1.85 ± 0.17

^a When statistically significantly different to the respective controls, P < 0.05.