Question

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

Answer 1

Stomata are small pores present in the epidermis of leaves. They regulate the process of transpiration and gaseous exchange. The stomatal pore is enclosed between two bean-shaped guard cells. The inner walls of guard cells are thick, while the outer walls are thin. The guard cells are surrounded by subsidiary cells. These are the specialised epidermal cells present around the guard cells. The pores, the guard cells, and the subsidiary cells together constitute the stomatal apparatus.

Answer 2

The small pores that are just in the leaves of the epidermis are known as stomata.

This is responsible for the regulation of transpiration process and exchange of gases.

On top of that, there are guard cells which are of an oval shape and thick on the inner side while thin on the outer wall.