What is stomatal apparatus? Explain the structure of stomata with a labelled diagram.

Monjur Alahi

What is stomatal apparatus? Explain the structure of stomata with a labelled diagram.


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Salim Ahmed Kawsar

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Stomata are structures present in the epidermis of leaves. Stomata regulate the process of transpiration and gaseous exchange. Each stomata is composed of two bean-shaped cells known as guard cellls. In grasses, the guard cells are dumbbell-shaped.

The outer walls of guard cells (away from the stomatal pore) are thin and the inner walls (towards the stomatal pore) are highly thickened. The guard cells possess chloroplasts and regulate the opening and closing of stomata.

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