Stimulus / Response ILP Project
Made by: Kaelyn Campbell
Geotropism
Geotropism is when plants grow in a certain way according to the force of gravity.
- The stimulus is gravity's pull on the plants resources and needs.
- The response is the way a plant grows or bends in response to gravity.
Hydrotrophism
Hydrotropism is the growth of plants roots toward or away from moisture. The stimulus is a plants need for water. The response is the way a plant grows or bends in response to water.
Phototrophism
Phototropism is response to light, either toward the source of light (positive phototropism) or away from it (negative phototropism). The stimulus is a plant's need for radiant energy. The response is the way a plant grows in response to light.
Thigmotrophism
Thigmotropism is the turning or bending of a plant in response to touch. The stimulus is touch. The response is the plant bending in response to touch.
Turgor Pressure
Turgor pressure is pressure exerted on a plant's cell walls due to full water vacuoles. The stimulus is lots of water. The response is the water vacuole in the cell fills up. A plant with high turgor pressure is healthy and stands erect. Low turgor will cause a plant to wilt.
Wilting
Wilting is when a plats cells shrivel up due to lack of water in the cell. The stimulus is lack of water. The response is the water vacuole is empty and there is low turgor pressure.
Transpiration
Transpiration is when the evaporation of water through the stoma(holes) in plants. The stimulus is the stoma opening to take in CO2. The response is transpiration.
Dormancy
A dormancy is a period in a plants life where development is temporarily stopped to conserve energy. The stimulus is the seasons changing. The response is leaves falling off and tree goes dormant.
Tomato Plant Wilt & Die
timelapse fall colors in central park
Celery transpiration experiment