What would enhance water uptake by a plant cell? a. decreasing the Ψ of the surrounding solution b. positive pressure on the surrounding solution c. the loss of solutes from the cell d. increasing the Ψ of the cytoplasm

Verified step by step guidance

1. Understand the concept of water potential (Ψ), which is a measure of the potential energy of water in a system compared to pure water. Water moves from areas of higher water potential to areas of lower water potential.
2. Recognize that the water potential of a cell is affected by solute concentration and pressure. The equation for water potential is Ψ = Ψs + Ψp, where Ψs is solute potential and Ψp is pressure potential.
3. Analyze option a: decreasing the Ψ of the surrounding solution would increase the solute concentration outside the cell, making it more negative. This creates a steeper gradient for water to move into the cell, enhancing water uptake.
4. Evaluate option b: positive pressure on the surrounding solution would increase the pressure potential outside the cell, making it less favorable for water to move into the cell.
5. Consider option c and d: the loss of solutes from the cell (c) would increase the water potential inside the cell, discouraging water uptake. Increasing the Ψ of the cytoplasm (d) would also make the internal environment less favorable for water uptake as it reduces the gradient.

Key Concepts

Water Potential (Ψ)

Water potential (Ψ) is a measure of the potential energy of water in a system, influencing the direction of water movement. It is composed of solute potential and pressure potential. A lower Ψ indicates a higher concentration of solutes, which can draw water into the cell, enhancing water uptake.

Osmosis

Osmosis is the passive movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration. This process is crucial for maintaining cell turgor and overall plant health, as it allows cells to absorb water efficiently.

Turgor Pressure

Turgor pressure is the pressure exerted by the fluid (usually water) inside the central vacuole of a plant cell against the cell wall. This pressure is essential for maintaining cell structure and rigidity. Increasing turgor pressure can enhance water uptake, as it creates a favorable gradient for osmosis.