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Tropism The movement of a plant in response to a stimulus.
- Chemotropism
- Movement in response to chemicals.
- Geotropism
- Movement in response to gravity.
- Negative Geotropism - shoots grow upwards.
- Positive Geotropism - roots grow downwards.
- Haptotropism
- Response to touch such as tendrils on a climbing plant wrapping themselves around other plants or supports.
- Hydrotropism
- Movement in response to water. Roots grow towards a source of water.
- Paraheliotropism
- Movement in response to light.
- Thermotropism
- Movement in response to temperature.
- Thigmotropism
- Response to touch such as tendrils on a climbing plant wrapping themselves around other plants or supports.
 
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