Figure 1.

Effect of drought on acid soluble (vacuolar), acid insoluble (cell wall), and neutral (cytosolic) invertase activity, and Susy activity in five vegetative organs from well-watered and water-stressed maize plants. Samplings were carried out at 9 am (3 h after light on) from d 2 to 11 after water interruption. White symbols, Control plants; black symbols, water-stressed plants. Mean ± se from four independent determinations. Control/stress Student's comparison: *, P < 0.05 significant; **, P < 0.01 very significant; ***, P < 0.001 highly significant.