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Question

Measure the rate of transpiration with the help of Ganong's potometer.


Solution

Determination of the rate of transpiration by Ganong's photometer. The device consists of a vessel containing water. A cut stem of a plant or a small plant with roots is placed in this vessel. It is sealed with wax or any other material. This vessel is connected to a water reservoir and a graduated capillary tube. Apparatus is kept for some time at an optimum climatic condition. The movement of bubbles through the graduated capillary tube is considered as a measure of the rate of transpiration.

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Biology

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