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Concept explainers
What are stomata? How do
these structures participate in
the plant transpiration?
Transpiration is evaporation of excess water from plants through its aerial parts like stem , leaves, flower.
This process is famously called Necessary evil in plants because although it causes loss of water , it maintains the temperature of plant , makes them cool.
Stomata are small pore like structure present on the leaf surface.
They are surrounded by 2 bean shaped cells, one on each side – known as guard cell.
Guard cells has thicker inner wall and thinner outer wall.
Stomatal aperture/ pore is tiny pore which is opens and close as per the environmental conditions.
Stomata have 2 main functions: Allows passage of oxygen and carbon dioxide. And regulates water movement through transpiration.
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