Plant responses to the environment
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Plant responses to environmental stimuli are called tropisms. Tropisms describe the growth or turning movement of a plant in response to external factors and can be positive, towards the stimulus, or negative, away from the stimulus. The main tropisms include phototropism, where plants grow towards light; geotropism, where plants grow towards or against gravity; thigmotropism, where plants respond to physical touch; and hydrotropism, where plants sense and grow towards sources of water.
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Plant responses to the environment
- 1. Plant responses to the environment
- 2. Tropisms Tropisms - a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus. The word tropism comes from the Greek trope ("to turn" or "to change"). Tropisms are usually named for the stimulus involved and may be either positive (towards the stimulus) or negative (away from the stimulus).
- 3. 1. Phototropism is the growth response of a plant in response to light direction.
- 4. 2. Geotropism is the growth response of a plant in response to gravity.
- 5. 3. Thigmotropism is the growth response of a plant to physical contact (touch).
- 6. 4. Hydrotropism is the growth response of a plant to water.