Turgour pressure is the

Options

A. Positive pressure
B. Negative pressure
C. Atmospheric pressure
D. Imbibition pressure

Answer

**Step-by-Step Solution:**

1. **Definition of Turgor Pressure**: Turgor pressure is defined as the pressure exerted by the fluid (usually water) inside the central vacuole of a plant cell against the cell wall. This pressure is crucial for maintaining the structural integrity of plant cells.

2. **Mechanism of Turgor Pressure**: The turgor pressure is created when water enters the plant cell through osmosis. As water fills the vacuole, it pushes the plasma membrane against the rigid cell wall, creating pressure.

3. **Role of Turgor Pressure**: Turgor pressure plays a vital role in plant growth and development. It helps maintain the shape of the plant cells, supports the plant structure, and aids in the overall growth of the plant.

4. **Relation to Osmosis**: Turgor pressure is regulated by osmosis, which is the movement of water across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration. This process is essential for maintaining the turgor pressure in plant cells.

5. **Imbibition Pressure**: Turgor pressure is also referred to as imbibition pressure. Imbibition is the process by which water is absorbed by the dry materials, leading to swelling. This pressure is crucial for the initial stages of seed germination and growth.

6. **Conclusion**: Therefore, turgor pressure can be summarized as the hydrostatic pressure within plant cells that is essential for maintaining cell structure and facilitating growth, regulated by osmosis and often referred to as imbibition pressure.

**Final Answer**: Turgor pressure is the hydrostatic pressure exerted by the fluid inside plant cells against the cell wall, regulated by osmosis, and is also known as imbibition pressure.

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