Question

design an experiment to demonstrate hydrotropism

Answer 1

Take a cubical transparent glass container and fill it with water. Now put some geminating seeds in it. After one or two days you will observe that the roots of all the geminating seeds will grow towards the water. This experiment proves that roots of germinating seed show the character of positive geotropism.
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Answer 2

experiment to demonstrate hydrotropism
1 take a wire mesh and cover it with moist saw dust.
2 place some germinating seedlings in the moist saw dust.
3 keep the saw dust moist by sprinkling water at regular intervals. observe after 2-3 days.
4 as the radicals come out of the seeds, they ate seen to move towards the perforation . after some growth they bend back and enter the perforations to reach the moist saw dust in complete disregaed of gravity..




conclusion: bending of radicals back into moist saw dust is a hydrotrophic movement. it occurs despite being against the force of gravity...