Plant Auxins: Auxins are weakly acidic phytohormones with an unsaturated ring structure. They act as growth promoter hormones and help in the elongation of shoot cells. Auxin was the first hormone to be discovered. Auxins were discovered by Dutch botanist F.W.Went (1928) by experimenting on oat (Avena sativa). The chemical which works as auxin is Indole Acetic Acid (IAA). It was first isolated from human urine. This auxin is produced naturally inside the plant body, therefore, it is also called as natural auxin. In addition to IAA, some other natural auxins are indole-3-pyruvic acid, indole-3-ethanol, indole-3-acetaldehyde, etc. There are also … Continue reading What Are Plant Auxins? Discuss the role of Auxins (IAA) in the plant body?