the given diagram illustrates stomata closing the major mistake in the diagram is that

Options

A. the concentration of the `K_(+)` should be more outside the guard cells
B. the concentration of the `K_(+)` should be equal on both inside and outside
C. the peripheral walls of the guard cells should be thicker
D. the water should move inside the guard cells.

Answer

A

Explanation

During stomatal closure, the `H^(+)` ions diffuse out of the guard cell chloroplat. Any malate presents in the cytoplasm combines with `H^(+)` to form malic acid. Undissociated malic acid promotes leakage of ions. As a result `K^(+)` ions dissociate from malate and pass out of the guard cells. Loss of `K^(+)` ions decreases osmotic concentration fo guard cells as compared to adjacent epidermal cell. this causes exomosis and hence turgidity of the guard cells decreases.