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The main functions of auxins are:

  1. Auxin promotes cell elongation.
  2. It promotes cell division in vascular cambium.
  3. It is used as the rooting hormones since it promotes root initiation.
  4. It causes apical dominance.
  5. It induces parthenocarpy.
  6. It induces DNA synthesis and meiosis.
  7. It prevents abscission of leaves and fruits.
  8. It causes callus formation.
  9. It promotes the root formation in stem and leaf cuttings.
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