iarjalsIARJALSIARJALS2708-5104https://doi.org/10.47310/iarjals.2024.v05i02.001The Positive Role of Zinc oxide Nanoparticles on Certain Physiological Indicators and Oxidative Stress in Two Varieties of Mung Bean (Vigna radiata L.) Under Water Stress ConditionsAseelHamedBilalAlaaHusseinAliAmjadAbdul-Hadi MohammedCollege of Science, University of Mosul/ MosulUnder the spring of 2023, a pot experiment was carried out under the wooden shade structure of the University of Mosul's College of Agriculture and Forestry's Forestry Department. The study examined the impact of zinc oxide (ZnO) nanoparticles on a few biochemical and physiological parameters in two types of mung beans that were subjected to water stress using loamy sand soil. Following a fully randomized design (CRD), the experiment had three levels of ZnO (0.0, 100, and 200 parts per million) with three replications, and three levels of field capacity (30%, 50%, and 80%).The outcomes demonstrated that ZnO nanoparticle treatment greatly lowered the negative effects of water stress and the activity of antioxidant enzymes (CAT and POD), while significantly increasing plant pigment content (Chlorophyll a and b). Compared to the other treatments, the use of ZnO nanoparticles at a concentration of 100 parts per million produced the best results in minimizing the effects of water stress