This book presents evidence-based approaches and techniques used to diagnose and manage organic solutes, oxidative stress, and antioxidant enzymes in crop plants under abiotic stressors. It discusses strategies in abiotic stress tolerance including osmoregulation, osmoprotectants, and the regulation of compatible solutes and antioxidant enzymes in plants. With contributions from 49 scholars worldwide, this authoritative guide is educational for scientists working with plants and abiotic stressors.