What is Stomata ?

Definition:

Stomata are the tiny openings present on the epidermis of leaves and play an important role in gaseous exchange and photosynthesis.

7 Important Types of Stomata

Stomata is of following types on the basis of number and characteristics of the surrounding subsidiary cells:-

1. Paracytic.
2. Tetracytic.
3. Actinocytic.
4. Graminaceous.
5. Anisocytic or Cruciferous.
6. Diacytic or Caryophyllaceous.
7. Anomocytic or Ranunculaceous.

Structure of Stomata

• Consists of minute pores called stomata surrounded by a pair of guard cells.
• Stomata, open and close according to the turgidity of guard cells. 
• The cell wall surrounding the pore is flexible and tough. 
• The shape of guard cells usually differs in both monocots and dicots. 
• Guard cells are bean shaped, contain chlorophyll and capture light energy.
• Subsidiary cells surround the guard cells. 

Functions of Stomata

• Gaseous exchange between the plant and surrounding.
• Helps in transpiration and removal of excess water in the form of water vapor.
• Maintains the moisture balance according to weather by opening and closing.
• Facilitates carbon dioxide uptake and release of oxygen during the process of photosynthesis.

Also Check – 8 Important Functions of the Stomata

Also Check – Mechanism of opening and Closing of the Stomata

Also Check – Stomata – Structure,  Functions ,  Location , Diagram and Types

Also Check – Stomatal Transpiration

Also Check – Exchange of Gases in Plants

Also Check – What is Guard Cells ? Definition,Location, Structure, Function and Diagram of Guard Cells