are signaling molecules produced by plants that regulate various processes such as growth, development, and response to environmental stimuli. There are five major classes of plant hormones:
1. Auxins: Auxins promote cell elongation, root growth, and apical dominance. They also play a role in phototropism and gravitropism.
2. Gibberellins: Gibberellins promote stem elongation, seed germination, and flowering. They also regulate reproductive development in plants.
3. Cytokinins: Cytokinins stimulate cell division, promote shoot growth, and delay senescence in plants. They also play a role in nutrient uptake and transport.
4. Abscisic acid (ABA): ABA is involved in regulating plant responses to stress, such as drought and cold. It also promotes seed dormancy and regulates stomatal closure.
5. Ethylene: Ethylene regulates fruit ripening, senescence, and response to environmental stress. It also plays a role in plant growth and development.
These plant hormones work together to coordinate various physiological processes in plants and ensure their overall growth and development.
Plant hormones
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