Fig. 4.

Total G6PDH activity in barley roots (A) and leaves (B). Barley seedlings were grown for 3 d in hydroculture without any nitrogen source, then with 5 mM ammonium phosphate for 7 d. The seedlings were then supplied with 0.1 mM ABA, samples were collected at the given times, and the crude extracts of leaves and roots were assayed for G6PDH activity. Data shown are the average ±SE of four different determinations measured at least in duplicate. A statistical one-way ANOVA was performed using Jandel SigmaPlot 11.0 Software; other details are given in the text.