An apparatus as shown was set up to investigate a physiological process in plants. The set-up was kept in sunlight for two hours. Droplets of water were then seen inside the bell jar. Answer the questions that follow:
Explain the process?
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Solution
Transpiration:
The process is Transpiration.
Transpiration is the loss of water in the form of vapors from the aerial parts of the plant.
Various environmental factors like temperature, light, wind, humidity and internal factors like the structure of the leaf and root-shoot ratio affect transpiration.
Transpiration not only brings about the ascent of sap but also has a cooling effect and saves the plant from heat injury.
When the transpiration rate exceeds the water absorption rate, it leads to wilting of the plant.
