FIGURE 2.

ATP hydrolysing activity in plasma membrane-enriched vesicles from the roots of maize plants. ATP hydrolysing activity was measured in plasma membrane (PM)-enriched vesicles isolated from both ${\mathrm{NO}}_{\mathrm{3}}^{\mathrm{–}}$-induced roots and in control roots. Data are the means ± SE; n = 3. The statistical significance was determined by means of Student’s t-test. (^∗∗P < 0.01; ^∗P < 0.05).