ABSTRACT
Abstract. Abiotic stresses such as high salinity, drought, and extreme temperature adversely affect plant growth, crop productivity, and subsequently the death of plant. Salt stress in plants leads to stomatal closure and reduces the carbon dioxide/oxygen ratio. The reduced ratio results in the generation of high amounts of reactive oxygen species (ROS) contributing to oxidative stress. In normal aerobic conditions, ROS are effectively neutralized, but in abiotic stress conditions, there is an excess production of ROS that damages the plant. Plants have developed complex antioxidant defense systems such as ROS-scavenging enzymes
and low-molecular antioxidants. Plants accumulating high amounts of antioxidant enzymes and antioxidants under salt stress were proven to maintain the plant growth and productivity. Progress has been made in developing transgenic lines that are tolerant to salt-induced oxidative stress by altering antioxidant levels in different crops. In this connection, to harness the potential of transgenic lines in counteracting stress-induced oxidative stress in abiotic conditions is reviewed.
