Give an example of a plant hormone that promotes growth.

Auxin is an example of a plant hormone that promotes the growth of the plant.


  1. Auxins promote stem elongation, inhibit the growth of lateral buds (maintains apical dominance).
  2. They are produced in the stem, buds, and root tips.
  3. Auxin moves to the darker side of the plant, causing the cells to grow larger than corresponding cells on the lighter side of the plant.
  4. Helps in cell division and xylem differentiation
  5. Induces parthenocarpy, i.e. development of fruit without fertilisation, e.g. in tomatoes

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