Plant Response to External Stimuli
Explore different types of plant tropisms such as phototropism, geotropism, and thigmotropism. Learn about turgor pressure in plant cells and how it affects plant rigidity and wilting.
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Presentation Transcript
Tropisms and Turgor Pressure TEKS 7.7C
Tropism - The response of plants to external stimuli
Phototropism - The tendency of a plant to grow towards light
Geotropism (Gravitropism) - The tendency of a plant to grow in a direction in response to gravity (roots-down)
Thigmotropism - Response of plants to touch such as in vines and climbing plants on trees
Turgor Pressure Water pressure in a cell that pushes against the cell membrane and cell wall. It makes plants cells firm and rigid. Loss of it is referred to as wilting.
