Where in the plant is auxin primarily produced?

Auxin, a key plant hormone, is primarily produced in the shoot tips, which are the growing regions at the top of the plant. This hormone plays a crucial role in regulating various aspects of plant growth and development, including cell elongation, apical dominance, and responses to light and gravity. The high concentration of auxin in the shoot tips promotes elongation of those cells, helping the plant grow taller and reach towards light, which is essential for photosynthesis.

While roots and leaf tips produce auxin to some extent, their contribution is not as significant as that from the shoot tips. Flower petals do not typically produce auxin; their main role involves attracting pollinators and facilitating reproduction. Thus, the shoot tips are recognized as the primary site of auxin production, critical for the plant’s growth and developmental responses.