The impact of silicon and nano silicon on improving resistance of Isatis cappadocica to arsenite

Arsenite, as a higher toxicity and its low concentrations causing stress and reducing of plant growth. The application of silicon in plants under stress can increaseresistance. Some plant species, with an accumulation of high concentrations of arsenic, have the ability to refine contaminated areas. Previous studies have proven the hyperaccumulation of Isatis cappadocica, and hence the production of sufficient biomass is one of the important factors in the success of plants for purification, in this research, we tried to use silicone and nano silicon to produce more resistant seedlings against arsenite. For this purpose, the effects of silicon and nano silicon (25 mg/L) under arsenite treatment with concentrations of 0, 25 and 50 μm were investigated under hydroponic conditions. After harvest, growth parameters including the length and biomass of root and shoot were measured. The results showed that 50 μM arsenite treatment reduced the biomass of the plant, and the biomass of root and shoot decreased by 55% and 56%, respectively as compared to control. While the application of silicon and nano silicone improved the biomass and reduced the toxic effect of arsenite. Resulting of nano silicon application showed that the biomass of root and shoot increased by 50% and 20%, respectively as compared to 50 μM arsenite treatment. This positive effect was more pronounced in nano silicone treatment and resulted in a significant increase in the biomass of the root and the shoot. This increase in growth parameters, indicating an improvement in plant resistance to arsenite, is being treated with nano silicon.

کلیدواژه ها:

Arsenite ، Silicon ، Nanosilicon ، Isatis cappadocica