Answer:
Guard cells optimise leaf gas exchange in response to changing environmental conditions and their turgor is controlled by alterations in atmospheric CO2 concentration, light intensity, humidity and the drought hormone abscisic acid.
Explanation: I searched it up lol
The purpose of guard cells around stomata is to open or close pores in response to fluctuations in environmental conditions.
Guard cells are those that control the opening of the stoma by changing shape.
The leaf stoma is an adaptation of the leaf that helps the plant regulate water content and adjust to changing environmental conditions.
Guardian cells have a complex signaling network, a high capacity to transport ions, and modified metabolic pathways that give them the ability to rapidly change their volume to modulate the opening of stomata.
Light and CO2 favor opening, while both types of stress induce stomatal closure.
That is why the main function of the guard cells is to close the stoma if necessary, to avoid the loss of water.
They integrate the changes in these factors and generating a response that increases or decreases its turgor, respectively.
Therefore, we can conclude that the purpose of guard cells around stomata is to open or close pores in response to fluctuations in environmental conditions.
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