in Anatomy of Flowering Plants by

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The main functions of cortex are:

  1. The cortical cells can store starch.
  2. In aquatic plants cortical cells are aerenchymatous enclosing air cavities.
  3. Certain aerial climbers possess chlorophyll cells to perform photosynthesis.
  4. In monocots, dicots and gymnosperms, the sub epidermal cells or cortical cells differentiate into protective tissue known as the exodermis.