Question

Presently which view is considered best for turgor changes in guard cells

• A. Photosynthesis of chloroplasts in guard cells.
• B. Starch is converted into sugar in guard cells.
• C. Starch is converted into glucose in guard cells.
• D. Potassium is transported into guard cells.

Answer 1

Answer: (D)

Potassium is transported into guard cells.

Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. An increase in solute concentration lowers the water potential of the solution, and that water moves from a region with higher water potential to a region of lower water potential.

This turgidity is caused by the accumulation of K+ (potassium ions) in the guard cells. As K+ levels increase in the guard cells, the water potential of the guard cells drops, and water enters the guard cells.

So the correct answer is 'Potassium is transported into guard cells'.