This book will present examples of chemical biology approaches that have resulted in the identification of new small chemicals with an impact on plant development and physiology, and give illustrations of how the mode of action is being studied using molecular tools. Although molecular laboratory experiments have a high discovery rate and give very detailed information on the studied processes, the interchange of field studies and that of lab scale investigations is required to narrow down the parameters that determine the effectiveness of biostimulants, something that is of great importance...