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Question
What is the stomatal apparatus?
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Solution
- The structures called stomata are found in the leaf's epidermis. Gaseous exchange and transpiration are controlled by stomata.
- Each stoma is made up of two guard cells, which are bean-shaped cells that surround the stomatal orifice. Guard cells have thin outer walls that face away from the stomatal pore and significantly thickened interior walls that face the pore. The guard cells control the opening and shutting of stomata and have chloroplasts.
- Occasionally, a small number of epidermal cells near the guard cells develop into subsidiary cells due to their specific size and form. The term "stomatal apparatus" refers to the guard cells, surrounding subsidiary cells, and the stomatal aperture collectively.
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