 Plants are subject to various environmental stresses, including drought, which can have a significant effect on their growth and yield. Under drought stress, plants experience a range of morphological, physiological, and biochemical changes in order to conserve water and maintain photosynthesis. These include closing of stomata, increased production of antioxidants, and the accumulation of osmolites and aquaporins. Some plants are able to tolerate drought better than others, and this ability can be used to improve crop performance. Techniques such as breeding for drought resistance, selection of cultivars with high drought tolerance, and application of irrigation or other water management practices can be used to increase the tolerance of crops to drought. This article was authored by Rui Kapoor, Savita Vardwaj, Mark Olandi, and others.