What is the role of `K^(+)` ions during opening of stomata.

Explanation

During ionic exchange process for opening of stomata `H^(+)` ions are transported to epidermal cell and `K^(+)` ions are taken to the guard cells in exchange of `H^(+)` . Increased concentration of `K^(+)` in the vacuoles of guard cells lead to opening of stomata due to increased turgor of guard cell.