Hormones

• Auxins are secreted by the plant when it detects sunlight, diffusing towards the shady side of the plant, causing the cells on the shady side to grow longer, making the plant appear to bend towards light.
• Gibberellins also contribute to growth, unlike auxins which focus on stem growth.
• Cytokinins play an important role in cell division, promoting cell division and are usually present in greater concentrations in fruits and seeds.
• The rate of cell division in the plant is higher in the region that has higher concentrations of cytokinins.
• Abscisic acid is different from other plant growth regulators as it stops growth, causing wilting and yellowing of leaves.
• Ethylene is an odorless gas that speeds up the ripening process and is involved in the production of more flowers and fruits.
• Ethylene comes under plant growth inhibitors as the process of growth is stopped and focuses on production and ripening of flowers and fruits.