what is auxin
Auxins were the first of the major plant hormones to be discovered. They derive their name from the Greek word Î±ÏÎ¾ÎµÎ¹Î½ (auxein - to grow/increase). Auxin (namely IAA) is present in all parts of a plant, although in very different concentrations.uxins and their role in plant growth were first described by the Dutch scientist Frits Warmolt Went. Kenneth V. Thimann isolated this phytohormone and determined its chemical structure as indole-3-acetic acid (IAA). Went and Thimann co-authored a book on plant hormones, Phytohormones, in 1937.