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Explain hydrotropism with the help of an...

Explain hydrotropism with the help of an example.

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i] A porous pot filled with water is taken and inserted in a tub filled with dry sand.
ii] A freshly germinated pea seedling is sowed in the sand.
iii] As water is not available in sand, the root growing will bend towards the porous pot filled with water.
iv] A hydrotropic curvature of the root is observed as it grows towards water.
v] This bending of root shows the movement in response towards water. The movement of the plant root towards water is positive hydrotropism.
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