Determine The Rate Of Transpiration By Ganong's Potometer. Determination of the rate of transpiration by ganong's photometer. A cut stem of a plant or a small plant with roots is placed in this vessel.
The main type of potometer is the 'bubble' potometer shown in the figure below. Distance moved by the air bubble/time taken for the air bubble to move that distance (d) by garreau's potometer (fig.
It is also known as transpirometer.
A qualitative, as also roughly quantitative aspect, is given by cobalt chloride paper method.) There are several types of potometers described in literature e.g., ganong's potometer, farmers potometer, bose potometer, simple or darwin potometer. Usually ganong's potometer is used to measure the rate of transpiration in a cut twig under laboratory conditions. Using a potometer, the amount of water absorbed by a leafy shoot can be measured.