Here is a list of top six plant growth regulators: 1. Auxins 2. Gibberellins 3. Cytokinins 4. Ethylene 5. Abscisic Acid (ABA) 6. Synthetic Growth Regulators. 1. Auxins: Auxin (from Gr., auxein = to grow). Indole-3-acetic acid (IAA) is an auxin that occurs naturally in plants. Auxin was first isolated from human urine. Synthesis and […]