sale indole acetic acid iaa auxin iaa hormoneIAA is predominantly produced in cells of the apex (bud) and very young leaves of a plant. IAA has many different effects, as all auxins do, such as inducing cell elongation and cell division with all subsequent results for plant growth and development. On a larger scale, IAA serves as signaling molecule necessary for development of plant organs and coordination of growth.

Indole Acetic Acid can induce cell elongation and cell division with all subsequent results for plant growth and development. 

IAA  induces the formation and organization of xylem and phloem. When the plant is injured, the auxin can induce the cell differentiation and regeneration of the vascular tissues.