Figure 6.

Properties of the K⁺-permeable, SI-induced conductance. SI was induced in pollen protoplasts bathed in K⁺-containing saline. Currents were elicited using the voltage ramp protocol. A, SI-induced current at −180 mV (±se; n = 3) in K⁺-containing medium (SI) and after addition of 2 mm BaCl₂ (Ba²⁺). B, Representative raw traces showing the effects of various concentrations of Ba²⁺ (as indicated; mm) on the PrsS-induced K⁺ current. The current obtained from an untreated (UT) protoplast was similar to that in the presence of 2 mm Ba²⁺. C, Mean ± se data for the effect of different Ba²⁺ concentrations on SI-induced currents (n = 3).