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Describe an experiment to demonstrate root pressu
Aim: To demonstrate root pressure in plants.
Apparatus : Potted olan
rate root pressure in plants.
bube cla
Answers
Aim : To demonstrate root pressure.
Apparatus: A potted plant, knife, rubber tube, glass tube, coloured water.
Procedure: Water the herbaceous plants and keep it for some time. Then cut off the upper part of the stem and attach a narrow glass tube on it. Fill the glass tube with coloured water. Mark the level of water and connect a manometer to the glass tube. Record your observations after some time.
Observations: The colour water rises in level and the manometer shows the root pressure by the increase in mercury level.
Conclusion: The water level increases as a result of root presure. The root pressure is of a small magnitude as shown by the manometer.
Answer:
A. Aim : To demonstrate root pressure in plants.
Apparatus : Potted plant with stem cut, rubber tube, glass tube, clamp.
Procedure:
Take a regularly watered potted plant and cut the stem portion 1 cm above the ground level.
Then connect a glass tube by means of a strong rubber tubing as shown in the figure.
The size of glass tube should be equal to the size of the stem.
Take care while joining tube and stem being bound tightly, water cannot escape
. from the tube.
Now pour some water in the glass tube until water level can be seen above the rubber tube.
Mark the level of water (Mj) in tube.
Keep your arrangement aside for 2 to 3
hours. ’
Then observe and mark the water level (M2) in the tube.
The difference between M2 and Mj indicates the level of water raised.
Observation : There is increase in the level of water raised in the stem.
Result: The raise in the water level is due to the root pressure created in the plant
Explanation: