Figure 4.
Current/voltage relations of whole-cell inward K+ currents with adaxial (Ad) and abaxial (Ab) guard cell protoplasts with or without 1.5 μm Ca2+ (the calculated free Ca2+ concentration) in the pipette solutions. K+ current amplitudes are expressed as the current per unit cell capacitance to correct for variations resulting from different cell sizes. The number of replicates for each treatment were 9 (Ad, Control), 11 (Ad, Ca2+), and 6 (Ab, Control and Ab, Ca2+). Each data point is the mean ± se.