👉 Auxin is a type of hormone produced by the plant cells in response to stress or disease. It acts as a chemical messenger that helps plants respond to environmental stimuli, such as drought, infection, and nutrient deficiency. In simple terms, auxin signals the plant's cells to increase their activity, leading to changes in the plant's growth, development, and overall health. Auxins are produced by specialized cells called auxin-producing organs (also known as auxin organs) within the chloroplasts