Hydro means water. Hydrotropism means growth towards water.
Materials Required: Seed, A big container, Porous water pot, water and Sand.
The tray should be big enough to accommodate the porous pot.
Fill the tray with sand and insert some seeds in it.
Make a pit in the sand and insert the porous pot in it.
Fill the porous pot with water.
Leave the set up for about a week.
After a week when seeds are taken out, it is observed that roots grow in the direction of the porous pot. This shows hydrotropic movement in roots.