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

(N/A) The stomatal apparatus consists of the stomatal aperture,guard cells,and surrounding subsidiary cells.
Stomata are small pores present in the epidermis of leaves that regulate the process of transpiration and gaseous exchange.
Each stomatal pore is enclosed between two bean-shaped guard cells.
In grasses,the guard cells are dumbbell-shaped.
The inner walls of guard cells (towards the pore) are thick,while the outer walls are thin.
The guard cells contain chloroplasts and regulate the opening and closing of the stomata.
The guard cells are surrounded by subsidiary cells,which are specialized epidermal cells that provide support to the guard cells.
Together,the stomatal aperture,guard cells,and the surrounding subsidiary cells constitute the stomatal apparatus.