Secondary metabolites mainly the phenolic compounds play an essential role in scavenging the reactive oxygen species in plants which occur due to salt stress. This study primarily focused on pre-treatment of Sorghum bicolor var. SS77 seeds with a potent phenolic compound (Coumarin) to induce salt tolerance in seedlings. The seeds were hydroprimed with distilled water and with two different concentrations (50 ppm and 100 ppm) of coumarin. They were germinated under different salinity regimes of 0 mM, 100 mM and 200 mM NaCl by incubating in growth chamber at 28 ± 1 °C in dark for 12 h and seedlings were harvested after 12 days. Coumarin (100 ppm) effectively enhanced vegetative growth and antioxidant enzyme activities (catalase, ascorbate and guaiacol peroxidase) of sorghum seedlings under different salinity regimes. However, salt stress has considerably reduced vegetative growth and antioxidant enzyme activities of sorghum seeds under different salinity regimes. Increase in vegetative growth parameters (shoot and root lengths, fresh and dry weights) and antioxidant enzyme activities (catalase, ascorbate peroxidase and Guaiacol peroxidase) were recorded at different salinity regimes. Coumarin 100 ppm dosage was found to be more effective as compared to 50 ppm coumarin and also give better results at higher salt concentration.
Robina Sultana, Muhammad Waseem Abbasi, Muhammad Yousuf Adnan, Muhmmad Azeem. (2020) EXOGENOUSLY APPLIED COUMARIN-INDUCED SALT TOLERANCE IN A MULTIPURPOSE CROP SORGHUM BICOLOR UNDER SALINE CONDITIONS, , Volume 17, Issue 1.
