Transpiration

Comparing Transpiration Rates of Leaves ExpandBefore beginning the experiments, gather leaves from four plant species that represent different ecological strategies, so that you have enough for one set of leaves per student. NOTE: If leaf-bearing plants are not available locally, an alternative is to grow the plant species of interest in the laboratory, or to purchase plants from a gardening store. Next, cut lengths of rubber tubing to make roughly 50 cm sections and place one piece alongside a 5 mL pipette at each student workstation. Then, set out a bucket or tray of water and ensure students have access to the appropriate clamps and stands. Finally, set out bottles of clear nail polish, as well as clear tape and clean microscope slides for the stomata exercise.