Tropism:
- Tropism occurs when a plant responds to a stimulus by exhibiting some growth movement.
- The stimulus's direction determines tropism.
- Plants can respond to a stimulus in two ways: negatively or positively.
Hydrotropism:
- Hydrotropism is a plant's response to a stimulus or gradient in water concentration that determines the direction of growth.
- Roots exhibit a positive hydrotropic response as they move and grow towards the water.
Examples of hydrotropism:
- Tomato root
- Radish root