Table 1.

Rice root membrane potentials

Membrane potentials (E _m) were recorded from epidermal rice root cells bathed in 0.2mM CaCl₂, pH 6 buffer (see Methods). Plants were K-starved for 5 d in 0K medium. E _K was calculated using K⁺ tissue data from Fig. 1. Data are given ±SD and the number in parentheses denotes the number of impalements. n.d.: not defined.

	Buffer [K+]
E	0 mM	0.1 mM	1 mM
E m (mV)	−154±17.7 (5)	−142±18.4 (4)	−109±15.2 (4)
E K (mV)	n.d.	−129 to −138	−84 to −96