اثر نیترات نقره بر برخی از شاخص‌های جوانه‌زنی گندم نان

Silver is one of the heavy metals in the environment and can play different roles in plants at different concentrations. For this purpose, one experiment to investigate the effect of silver nitrate on germination parameters of wheat in laboratory conditions was conducted in a completely randomized design. Silver nitrate solution at concentrations of 0, 200, 400, 600 and 800 milligrams per liter (ppm) were prepared, and 10 ml of silver nitrate solution added to Petri dishes containing wheat seeds, then were kept in germinator for 7 days at temperature of 25 ± 2°C and 65% relative humidity. After this period, the percentage of germination, germination rate, root and shoot length, total dry weight of seedlings and remaining reserves of seeds parameters were measured. Experimental results showed that the silver nitrate cause to significantly decrease in germination percentage, germination rate, rootlet and plumule length and plantlet dry weight, But with increasing concentration of silver nitrate, increased the remaining seed reserves. Which may result of reduction activity of embryo hydrolysis enzymes and decreased transmission of seed reserves to increase growth.