What does "turgor pressure" refer to in plants?

Turgor pressure is defined as the pressure exerted by the fluid (usually water) within the central vacuole of plant cells against the cell wall. This pressure is crucial for maintaining the plant's structure and rigidity, preventing wilting, and ensuring that the plant stands upright. When a plant is well-hydrated, the turgor pressure is high, allowing the cells to expand and giving the plant its firm shape.

The other options do not accurately describe turgor pressure. The pressure from soil on plant roots does not reflect the internal state of the plant cells. Wind-related pressures on leaves are not connected to the internal pressure within the cells. Lastly, the influence of pollinators does not pertain to turgor pressure, as this term specifically relates to the internal physiological state that aids in maintaining plant structure and function.