The stomatal apparatus comprises the following parts.
• A small aperture or opening present in the epidermal cells of the leaf called stoma. This is also called a stomatal aperture (singular- stoma, plural – stomata).
• Two bean-shaped guard cells surrounding the stomatal aperture. (It is to be noted that guard cells are dumbbell-shaped in monocots and bean-shaped in dicots.)
• Subsidiary cells – These are specific epidermal cells in the vicinity of guard cells.
• Change in the turgidity or flaccidity of the guard cells is associated with stomatal opening and closure.
• Stomata are essentially involved in gaseous exchange and transpiration.
Answered by Pragya Singh | 1 year ago
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