What is the role of indole acetic acid in plant growth?
Indoleacetic acid (IAA) is a molecule that is synthesized by plants and a few microbes (3, 4). In plants, IAA plays a key role in both root and shoot development. The hormone moves from one part of the plant to another by a designated importer (AUX1) and efflux pumps (PIN1–7) (5, 6).
