Turgor Movements Flashcards
What are turgor movements?
Movements caused by a loss of turgor pressure.
What is turgor pressure?
The force within a plant cell that pushes the plasma membrane against the cell wall.
What do turgor movements often work with to create more rapid movements?
Tropisms.
What does the loss of turgor pressure cause?
Cell collapse - if this occurs in tandem with other cells in an area, the plant will collapse around them.
How does turgor pressure affect tendril movements?
It’s posseted signal transduction occurs when solid objects are contacted, resulting in the exportation of potassium ions into a hypertonic environment.
What is a hypertonic environment?
A environment with higher osmotic pressure.
How does the exportation of potassium ions create a movement?
Water inside plant cells move into the hypertonic environment, down a water gradient, creating a collapse.
What is the pulvinus?
A structure sitting at the base of plant leaflets that receives messages from the epidermal leaflet cells.
What are sleep movements?
Movements following a circadian rhythm, oven achieved by turgor movements.
What family of plants uses sleep movements?
Legumes.
Name some examples of sleep movements.
Folding and reopening of petals.
