Stomata are involved in gas interchange and transpiration. The components of stomata are the pore, the guard cells, subsidiary cells, and the stomatic chamber.
What are stomata?
On the leafs' surfaces, there are small pores that regulate gas interchange and transpiration. These openings are the Stomata.
- Gas interchange ⇒ CO₂ gets into the plant, and O₂ leaves it
- Transpiration process ⇒ water expel
Stomata opening and closure depend on water and CO₂ concentration inside the plant.
These pores are surrounded by two kidney-shaped cells called Guard cells. They expand or contract according to the plants' needs, causing the stomata to open or close.
The space left between these guard cells is the pore.
Other cells that vary in shape and number are surrounding the guard cells and are functionally associated with them. These are the subsidiary cells.
The pore is connected to a wide intercellular space inside the leaves called the stomatic chamber.
According to this framework, the components of the stomata are,
- Pore
- Guard cells
- Subsidiary cells
- Stomatic chamber
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