The following points highlight the five main types of plant growth regulators. The types are: 1. Auxins 2. Gibberellins 3. Cytokinins 4. Ethylene 5. Abscissic Acid. Plant Growth Regulators: Type # 1. Auxins: Auxins (GK Auxein = to grow), isolated initially from human urine were the first plant PGR to be discovered. However, IAA also occurs in human urine, especially [...]
In this article we will discuss about Indole-3-Acetic Acid (IAA) and Auxin in Plants. Natural and Synthetic Auxin: The main auxin in plants is indole-3-acetic acid (IAA Fig. 20-2). Additionally, several other naturraly occurring indole derivatives are reported to express auxin activity, including indole-3- ethanol, indole-3-acetaldehyde, and indole-3-acetonitrile. It may be noted that all these compounds are precursors of IAA [...]
The below mentioned article provides study notes on Cyclic AMP (CAMP). Cyclic AMP was discovered by E.W. Sutherlandt in 1956 in animal liver cells. Since then it has been demonstrated in several animal tissues where its regulatory role has been well demonstrated. There are several evidences regarding the presence of cAMP in plants. Most of these evidences are based on [...]