Figure 4

Effects of DCPTA (5, 15, and 25 mg/L) on the Gs, Tr, Ci and Pn of the fully developed second leaf (numbered basipetally) of maize seedlings under simulated drought stress. The data represent the means of independent measurements with five replicates, and the standard deviations are indicated by the vertical error bars. Values with the same letters on the bars are not significantly different at P < 0.05.