Oxidative stress in plants is a complex chemical and physiological phenomenon that accompanies virtually all biotic and abiotic stresses in higher plants. There are various environmental factors such as extreme temperature, air pollutants, ultraviolet-B UV-B radiation, salinity, draught, pathogen infection and pesticides that can lead to the development of oxidative stress in plants. Exposure to all these factors affects a range of biological processes due to the generation of reactive oxygen species ROS. It is produced during mitochondrial oxidative metabolism and due to the cellular response to xenobiotics, cytokines, and bacterial invasion. An excessive production and accumulation of ROS causes an imbalance between the production of ROS and the neutralization of free radicals by antioxidants. Plant oxidative stress can be managed either by developing transgenic plants overexpressing one or more antioxidants, or by developing mutants that are resistant towards certain stresses. This