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A glass trough is taken and is filled with sand. A flower pot containing water, plugged at the bottom is kept at the centre of the glass trough. Soaked pea or bean seeds are placed around the pot in the sand. What do you observe aft er 6 or 7 days? Record your observation.

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Experiment to demonstrate Hydrotropism:

Take a glass trough and fill it with sand. Keep a Pea seedling at the centre. A porous pot with water is kept at the Trough, as shown in the diagram. Keep it for six or seven days. The Radicle has grown towards the porous pot and moisture, instead of growing vertically downward. It proves that primary root is positively Hydrotrophic and that hydrotropism is stronger than Geotropism.

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