in Anatomy of Flowering Plants by

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The important functions of the epidermal cells are:

  1. It acts as a protective layer which protects the internal tissue from the mechanical injuries. The extra protection is given by the layer cutin, wax, lignin, hairs on the epidermis.
  2. It reduces the loss of water by excessive transpiration.
  3. Certain xerophytic plants stores water and food materials in the form of mucilage in the epidermis
  4. Sharp and stiff hairs protect the plants from the grazing.
  5. Certain epidermal cells also possess chlorophyll which aids in the photosynthesis.
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