Investigation of biological and non-biological inraction on enzymatic and non-enzymatic antioxidant of coriander (Coriandrum sativum) under Pb stress condition

In order to increase vegetable productivity by improving environmental conditions, this article investigates the effects of stimulates exogenous of silicon and biological treatment on the activities of major antioxidant enzymatic and non-enzymatic and on lipid peroxidation under Pb stress. This study was conducted in pot experiment to determine the effects of four Pb concentrations (0, 500, 1000, and 1500 ppm) at three different concentrations of silicon (Si) (0, 1.5 and 3 mM) and PGPR (non-inoculated, isolated 6 and 19 and mycorrhiza) on a coriander (Coriandrum sativum). The traits measured in this study included plant biomass, catalase, peroxidase, superoxide dismutase, ascorbate peroxidase, malondialdehyde, phenol, and flavonoid and antioxidant capacity. The results of this study showed a significant decrease in plant biomass at different concentrations of Pb. In addition, the content of malondialdehyde, peroxidase, phenol, and flavonoid and antioxidant activity increased with increasing Pb concentration but catalase and superoxide dismutase activity only up to 500 ppm Pb was able to increase. The interaction isolate 6 bacteria or mycorrhizal isolate with foliar treatment with 3 mM silicon nanoparticles, which increased in most traits.