In biology, particularly concerning plant cells, "turgid" means swollen and hard. Plant cells become turgid when placed in dilute solutions, causing water to enter the cell.
Turgidity Explained
Here's a breakdown of what turgidity entails:
- Water Uptake: When a plant cell is in a hypotonic environment (a dilute solution), water moves into the cell via osmosis.
- Cell Swelling: As water enters, the cell swells.
- Pressure Increase: The internal pressure within the cell rises.
- Turgor Pressure: This internal pressure is called turgor pressure.
- Limit to Water Entry: Eventually, the turgor pressure becomes so high that no more water can enter the cell. The cell is then described as turgid.
- Cell Wall Protection: The cell wall prevents the cell from bursting due to the increased pressure.
Example: Plant Cells in Dilute Solutions
As the reference states, plant cells become turgid when placed in dilute solutions. This is essential for plant rigidity and support. Turgidity helps keep stems upright and leaves firm.
