An analysis of the effects of various levels of salicylic acid on the protective enzyme activity of red beet
S B Palve, D D Ahire
Enzymes are biological catalysts that increase the rate of chemical reactions without being consumed or altered. Studies show that foliar application of salicylic acid (SA) can alter enzyme activity in plants. The objective of this study was to investigate the effects of different concentrations of SA (0.4, 0.8, 1.2, 1.6, 2.0, 2.4, 2.8, and 3.2 mM) on antioxidant enzyme activity in Beta vulgaris L. plants. Activity of Enzymes like Ru BP Case (Ribulose-1,5-Bisphosphate Carboxylase), SOD (Superoxide Dismutase), Catalase, Peroxidase (POD) and Polyphenol Oxidase (PPO) were measured. The plants were grown in pots, and after the seedling thinning, salicylic acid treatments were applied. Concentrations of 2.8 and 3.2 mM SA caused a significant increase in polyphenol oxidase activity. No significant changes were recorded for catalase activity at any concentration of SA. Different concentrations of salicylic acid had different effects on enzyme activities in beet. Among all the enzymes, PPO shows negative correlation with all other enzymes. Higher concentrations of SA decreased SOD and POD activities, but at lower concentrations (0.4 to 1.2 mM SA) increased enzyme activities of Ru BP Case, Superoxide Dismutase, Peroxidase effectively. Therefore, Lower concentration of SA up to 1.2 mM is optimum to enhance growth, maximum concentration induce stress which affects growth of beet.
S B Palve, D D Ahire. An analysis of the effects of various levels of salicylic acid on the protective enzyme activity of red beet. International Journal of Botany Studies, Volume 7, Issue 1, 2022, Pages 648-654