Effect of gibberellic acid, potassium nitrate and silicic acid on antioxidative enzymes in groundnut (Arachis hypogaea L.) seedling irrigated with saline water

Abstract

Salinity is one of the most serious limiting factors for growth and production in groundnut and silicic an important phenolics, gibberellic acid an important growth hormone, potassium nitrate known to alleviates its adverse effect. Thus, Green house experiment was conducted to investigate the effect of gibberellic acid, potassium nitrate and silicic acid under salt stress on physiological, biochemical parameters and enzymatic activities of groundnut. The observations were recorded for enzymes viz., polyphenol oxidase, peroxidase and catalase. The result suggested that the antioxidant enzymes activity was affected due to salinity stress in groundnut. The antioxidant enzymes activities viz., polyphenol oxidase, peroxidase and catalase that increased with higher concentration of salt stress. On application of GA3, KNO3 and silicic acid decreased polyphenol oxidase, peroxidase and catalase enzymatic activity. This investigation has suggested gibberellic acid, potassium nitrate and silicic acid are potential biomolecules affecting the ROS scavenging enzyme under abiotic stress like salinity.