Stomata open and close due to sunlight causing a chemical reaction; resulting in a mechanical action..
its because the cel surface membrane around the guard cells have a potassium pump and this pump doesnt work without ATP. so in the day time the cholorplast absorb the light and pruduce ATP which then makes the potassium pump start pumping and because of this the solute potential inside the cell is higher so water from the moisture in the air moves into the stoma and cause it to expand which then makes it open.
Stomata open and close in response to changes in turgor pressure within the guard cells. When guard cells take up water, they become turgid and the stomata open to allow gas exchange. Conversely, when guard cells lose water, they become flaccid and the stomata close to prevent water loss.
The guard cells are specialized cells that control the opening and closing of the stomata in plant leaves. They can change shape to regulate the exchange of gases and water vapor between the leaf and the surrounding environment.
The stomata's function is to allow gas exchange with the surrounding air, so that the plant can intake carbon dioxide and oxygen. Stomatal opening is favored when there is plentiful water and moderate temperatures. Abscissic acid, a plant hormone, acts on the guard cells to open and close stomata. Some plants are even genetically engineered with a mutated era gene, which makes them more sensitive to abscissic acid and more prone to the opening and closing of guard cells. When guard cells are full of water, they stretch away from each other and the stomata are open. When guard cells are limp, they fall on each other and the stomata are closed. Potassium ions play a role in the opening and closing of stomata by changing the concentration of ions in the guard cells. When the potassium ions are in the guard cells, water also flows in the guard cells because of osmosis and the stomata open. When the potassium ions are out of the guard cells, water also flows out of the guard cells because of osmosis and the stomata close.
The specialized cells that control the aperture of the stomata are called guard cells. These cells change shape to open and close the pore of the stomata, thus regulating gas exchange and transpiration in plant leaves.
guard cells
The guard cells open and close the stomata as needed.
the guard cells
Stomata open and close in response to changes in turgor pressure within the guard cells. When guard cells take up water, they become turgid and the stomata open to allow gas exchange. Conversely, when guard cells lose water, they become flaccid and the stomata close to prevent water loss.
The guard cells are specialized cells that control the opening and closing of the stomata in plant leaves. They can change shape to regulate the exchange of gases and water vapor between the leaf and the surrounding environment.
Guard cells form the stomata. They can open and close to regulate the exchange of gases such as oxygen and carbon dioxide, as well as control water loss in plants.
If by guard cells you mean the ones located in plants, they open and close the stomata to control water loss :)
The stomata's function is to allow gas exchange with the surrounding air, so that the plant can intake carbon dioxide and oxygen. Stomatal opening is favored when there is plentiful water and moderate temperatures. Abscissic acid, a plant hormone, acts on the guard cells to open and close stomata. Some plants are even genetically engineered with a mutated era gene, which makes them more sensitive to abscissic acid and more prone to the opening and closing of guard cells. When guard cells are full of water, they stretch away from each other and the stomata are open. When guard cells are limp, they fall on each other and the stomata are closed. Potassium ions play a role in the opening and closing of stomata by changing the concentration of ions in the guard cells. When the potassium ions are in the guard cells, water also flows in the guard cells because of osmosis and the stomata open. When the potassium ions are out of the guard cells, water also flows out of the guard cells because of osmosis and the stomata close.
The specialized cells that control the aperture of the stomata are called guard cells. These cells change shape to open and close the pore of the stomata, thus regulating gas exchange and transpiration in plant leaves.
Pores called stomata, which open and close by guard cells.
guard cells
guard cells
Guard cells, which open and close stomata. Also, cutin.