Abstract

Salt stress induces osmotic stress, ionic toxicity and most drastically causes oxidative damage. High salt stress levels cause oxidative damage, associated with the production of different reactive oxygen species (ROS). Conventionally ROS were considered as bad guys and plants exhibited high antioxidants activities, can tolerate oxidative stress. Nonetheless recent evidences showed that ROS also act as signaling molecules which plays very crucial role in plant stress adaptation. This has prompted to reconsider conventional role of ROS as oxidative species and to further examine role of ROS as oxidative signaling in breeding programs to enhance salt stress tolerance in plants. Moreover, along with considering diversity of antioxidants, ROS production and ROS scavenging both at inter and intra-cellular level should be considered.