Plant and Response
Plant use direct environmental stimuli for orientation in growth and movement. this is called TROPISM. The responses of the plant may be toward (positive response) or away (negative response) from the external stimuli or stimulus.
Plants are able to respond to various different kinds of external environmental stimuli such as chemical in the soil, light, water, gravity and others. The growth movements are named according to the stimulus.
- Photoropism- reaction to light and different wavelenghts
- Heliotropism- reaction to sunlight intensity and direction
- Photoperiodism- reaction to the length of light and dark periods
- Gravitropism- reaction to gravity
- Hydrotropism- reaction to moisture gradient (water)
- Thigmotropism- reaction to touch
- Thermotropism- reaction to temperature
- Chemotropism- reaction to chemicals
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| Phototropism | | | | | |
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| Thigmotropism | |
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| Hydrotropism |
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| Geotropism |
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