Plant hormone functions

Plant hormones, or phytohormones, are chemical messengers that regulate various physiological processes in plants, including growth, development, and responses to environmental stimuli. Key classes of plant hormones include auxins, gibberellins, cytokinins, abscisic acid, and ethylene. Auxins are crucial for cell elongation and root formation, while gibberellins promote stem growth and seed germination. Cytokinins are involved in cell division and delay senescence. Abscisic acid plays a vital role in stress responses, particularly in drought conditions, by promoting stomatal closure. Ethylene regulates fruit ripening and flower senescence. Understanding hormone functions is essential for optimizing plant growth and improving agricultural practices.