How do the guard cells regulate the opening and closing of stoma
Answers
Explanation:
the opening and closing of the stomata is controlled by the guard cell .in light the gurad cell take up water by osmosis and become turgid,because their inner wall are rigid and move apart by opening the stomata and moving together by closing it.
Stomata can be thought of as gates. This is why the size of the guard cells is so important. How the guard cells change in size is a simple matter of how much fluid they can hold - their turgor. Osmosis is the movement of water through a semi-permeable membrane (a membrane that allows small molecules like H2O through it, but not larger molecules) from higher to lower water potential. When guard cells have low water potential then water enters the cell and makes it a turgid cell. Due to their inner cell wall being thicker and more rigid, the guard cells bend away from each other when they fill with water and this opens a pore