Effect of foliar application of salicylic acid on photosynthetic pigments and antioxidative enzymes of soybean plant
Publication Date : 04/08/2015
Salicylic acid is an endogenous plant growth regulator of phenolic in nature, which involves in the regulation of physiological processes in plants. The present investigation was carried out to study the effects of different concentrations (0, 10-4, 10-5, 10-6 M) of salicylic acid on vegetative characters, photosynthetic pigment, protein content, lipid peroxidation and antioxidative enzymes. Leaf samples were harvested on 45th, 60th and 90th days after sowing. Results showed that exogenous application of salicylic acid at concentration 10-6 M increases the vegetative characters and biochemical parameters which lead to significant rise in chlorophyll, protein and MDA content. However, SA at 10-4M and 10-5M did not exert a significant promotive effect as compared to SA at 10-6 M in retaining pigment loss, protein content and MDA content. Foliar spray with different concentration of SA also increased the activity of antioxidant enzymes like GPOX and SOD which prevent the plants from oxidative stress which is further produced by abiotic and biotic factors. Exogenous application of different concentration of SA (10-4M, 10-5M) also resulted in increased antioxidant activities but best response occurred at (10-6 M). Key words: salicylic acid, soybean, photosynthetic pigment, protein, antioxidant enzymes.
No. of Downloads :