Carbon dots from gum tragacanth: synthesis, characterization and the effect on the growth, physiological and biochemical parameters of Sesamum indicum L.
摘要
This research aimed to evaluate the effects of carbon dots on the physiological parameters of sesame. Carbon dots were prepared by hydrothermal treatment of Gum Tragacanth and characterized by TEM, FTIR, and XRD. Then the sesame treatment with concentrations of 0 (control), 5, 10, and 20 mg/L of carbon dots was carried out. Our data revealed that in the germination stage, the radicle length in all treatments, the seedling fresh weight in the concentration of 10 mg/L, and the amount of chlorophyll a and b in the concentration of 5 mg/L of carbon dots were significantly increased. In the hydroponic stage, the root fresh weight at a concentration of 20 mg/L of carbon dots was significantly increased. The highest amount of phenol, flavonoid, total carbohydrates, and total protein in the leaf, and phenol, flavonoid, and antioxidant capacity in the root was behold in the treatment with a concentration of 5 mg/L of carbon dots. The highest level of total protein in the root, and chlorophyll a, b, and total carotenoid were observed in a concentration of 10 mg/L of carbon dots. The activity of superoxide dismutase (SOD) in root and Ascorbate peroxidase (APX) in leaf and root in all treatments and the activity of catalase (CAT) in leaf and root at a concentration of 5 mg/L of carbon dots were significantly increased. It seems that low concentrations of carbon dots could be effective in improving physiological parameters of the sesame and therefore it is suggested as a suitable growth stimulant.