Auxin is an example of a plant hormone that promotes the growth of the plant.
- Auxins promote stem elongation, inhibit the growth of lateral buds (maintains apical dominance).
- They are produced in the stem, buds, and root tips.
- 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.
- Helps in cell division and xylem differentiation
- Induces parthenocarpy, i.e. development of fruit without fertilisation, e.g. in tomatoes