Vol. 3, Issue 1 (2018)
Effects of salicylic acid on the antioxidant enzymes activity in leaves of tomato under high temperature stress
Author(s): Shruti Kirti Singh, Pramod Kumar Singh
Abstract: The experiment was conducted to determine the effect of salicylic acid (SA) on the antioxidant enzymes activity in tomato as a randomized complete block design with three replications. The thermo tolerant genotype namely WIR-13708 was subjected to high temperature (320C + 450C) stress and analyzed for antioxidative enzymes i.e., peroxidase (POX), catalase (CAT) and superoxide dismutase (SOD) under controlled, stressed and treated conditions. Temperature above than 32 0C in tomato, cause an oxidative damage due to accumulation of reactive oxygen species (ROS). These antioxidants act as a major defense against oxidative damage caused by ROS. The exogenous applications of salicylic acid (SA) improved the activities of these enzymes. Results showed that treatment with 0.5mM salicylic acid both in the presence and in absence of stresses significantly improved the values for the above mentioned parameters.