Question

Describe an experiment to demonstrate transpiration

Answer 1

SIMPLE EXPERIMENT CAN BE CONDUCTED TO DEMONSTRATE THESE FACTORS. TRANSPIRATION IS THE PROCESS THAT INVOLVES LOSS OF WATER VAPOUR THROUGH THE STOMATA OF PLANTS. TRANSPIRATION IS THOUGHT TO INR NECESSARY POST I ABLE TO ALLOW THE PLANT TO ABSORB WATER FROM SOIL. IT IS AN INEVITABLE PROCESS .

Answer 2

Two equal pieces of cobalt chloride paper are dried and placed one on the upper surface and the other on the lower surface of dorsiventral leaves. They are firmly held in place by pieces of cellotapes or glass slides. After a few minutes the cohalt chloride paper shows change in colour from blue to pink. The time taken for the cobalt chloride paper on the upper surface of the leaf to turn pink is much longer than for the under surface. Thus, it proves that the rate of transpiration is greater from the under surface of dorsiventral leaves.