Guard cells surround each stomatal pore and control its opening and closing. When guard cells absorb water, they swell and the stomatal pore opens. Conversely, when they lose water, they shrink, causing the pore to close.
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Guard cells surround each stomatal pore and control its opening and closing. When guard cells absorb water, they swell and the stomatal pore opens. Conversely, when they lose water, they shrink, causing the pore to close.
Guard cells play a pivotal role in controlling the opening and closing of stomata. These specialized cells surround stomatal pores in plant leaves. When turgid, due to water uptake, guard cells bow outward, causing the stomatal pore to open. This allows for the influx of carbon dioxide essential for photosynthesis. Conversely, when guard cells lose water and become flaccid, they close the stomatal pore, reducing water loss through transpiration. The osmotic uptake or release of ions within the guard cells regulates their turgor pressure, influencing stomatal aperture. This dynamic control by guard cells ensures an optimal balance between gas exchange and water conservation.