EVENTS HAPPENING DURING OPENING AND CLOSING OF STOMATA

EVENTS DURING OPENING AND CLOSING OF STOMATA:

There is some changing in the chemistry of Stomata which results in the opening and closing of stomata. Following are the events which occur resulting the opening and closing of stomata.

• While opening of stomata, Hydrogen ions (H⁺) which are present in the guard cells are pumped out of the guard cells resulting in the lowering of positive charge and accumulation of negative charge in the guard cells.

• Due to this lowering of positive charge in guard cells, Potassium ions (K⁺) enter the guard cells.

• Due to this, Osmotic pressure in the guard cells is lowered, which attracts the water to enter into the cell.

• Starch in the chloroplast is converted into Malate ions.

Closed and Open Stomata

Closing:

Opposite of all above points results in closure of stomata cells.