Plant Hormones/PhytohormonesThese are chemical compounds which are released by s�mulated cells in plants and are responsible for the control and coordina�on in plants

Types of Plant Hormones

Auxins* When plants detect light, auxins are synthesized in the shoot �ps and diffuse towards the shaded region and help the cells to grow long.* Auxin s�mulates the cells to grow longer on the side of the shoot which is away from light, thus the plant bends towards the light.

Gibberellins* Work in the presence of auxin hormone.* Promote cell enlargement and differen�a�on. They also promote fruit growth, elonga�on of shoots and in breaking the dormancy in seeds and buds.

Cytokinins* They promote cell division in plants. They also promote the opening of the stomata and delay ageing in leaves.

Abscisic Acid* It promotes dormancy of seeds & buds, closing of stomata, wil�ng and falling of leaves and detachment of fruit and flower from the plant.* This hormone inhibits the growth of a plant.

Auxin molecules Cell elonga�on

Cytokinins = More Mitosis

Stoma Open

More Mitosis = More Cells

More Cells = Plant Growth