in Tissues in Plants by

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Being the outermost layer of the plant body, epidermis mainly has protective functions and protects against desiccation and infections.

  • The cutinized epidermis prevents the entry of pathogens, water loss from the aerial surfaces due to transpiration and also protects the plant from grazing.
  • Epiblema giving rise to root hairs increases the surface area of root for absorption of water and minerals from the soil.
  • Stomata in the epidermis help in gaseous exchange, primarily for photosynthesis.
  • Glandular trichomes secrete essential oil for the plant and give characteristic odor and aroma to them.
  • Cutinized aerial hairs or epidermal hairs perform insulating functions, protecting the plant against sudden changes in temperature and resultant high rate of transpiration.