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Difference Between Parenchyma, Collenchyma & Sclerenchyma with diagrams | NCERT-CBSE | thecbsesolver

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Plant tissues are divided into Meristematic Tissue (Apical Meristem, Lateral Meristem & Intercalary Meristem) & Permanent Tissue is Again devided into tow groups that is Simple Permanet Tissue & Complex Permanent Tissue (Xylem & Phloem).
    So, the Parenchyma, Collenchyma & Sclerenchyma comes under the Simple Permanet Tissue.


Parenchyma Tissue:

  • Have much intercellular spaces.
  • Provides mechanical support to plants.
  • Cell wall is thin.
  • These are living cell.
  • Possess large central vacuole.
Parenchyma is sub-divided into two group namely Chlorenchyma & Aerenchyma. 

    Chlorenchyma is a specialised type of Perenchyma which have green coloured pigment called Chlorophyll and it is found in all autotrophic plants.

    Aerenchyma is also a specialised type of Perenchyma which possess very much intercellular spaces, present in aquatic plants. This tissue help them to float on water easily because it has air cavities (spaces).



Collenchyma Tissue:  

  • Have less intercellular spaces.
  • Provides flexibility to plants.
  • Present below epidermis of stalks.
  • Cell wall is thickened at the corners.
  • These cells are living.


Sclerenchyma Tissue:   
                             

  • Have no intercellular spaces.
  • Provides rigidity & hardness to plants.
  • Present in seeds and on their covering.
  • Cell wall is thick.
  • All cells are dead.
  • These cells are made up of lignin, which makes it hard.

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