Changes induced by foliar application of salicylate on enzyme activities in vigna mungo (l.) hepper

Salicylic acid (SA) is a growth regulator that promotes growth of plants under stress and non stress conditions. The present study was conducted to determine the effect of foliar applications of salicylic acid (SA) on enzyme activity of Vigna mungo (L.) Hepper. SA was applied at five different concentrations (50ppm, 100ppm, 150ppm, 200ppm 250ppm) during the growth period of 15 days old Vigna seedling. Activities of antioxidant enzymes such as catalase (CAT), nitrate reductase activity (NRA), peroxidase (POD) polyphenoloxidase (PPO) and superoxide dismutase (SOD) were determined in the fresh leaves obtained from 15days old seedlings. Foliar applied SA caused a significant increase in leaf SOD and POD activity. However, leaf CAT activity was decreased with all SA treated plants compare to control plants.