 Plants are subject to various environmental stresses, including drought, which can have a significant effect on their growth and yield. Drought stress causes a number of morphological, physiological, and biochemical responses in order to reduce water loss through transpiration and maintain photosynthesis. These include stomatal closure, increased production of antioxidants, and the accumulation of osmolants and aquaporins. Some plants are able to tolerate drought better than others, and this has been studied extensively. Techniques such as breeding for drought resistance, selection of cultivars with high drought tolerance, and irrigation management can be used to increase the tolerance of crops to drought. Additionally, understanding the mechanisms of drought tolerance in plants can provide insight into how to improve the ability of crops to cope with drought. This article was authored by Dirty Kapoor, Savita Bardwaj, Mark Olandi, and others.