اﺛﺮ ﭘﻴﺶﺗﻴﻤﺎر ﻧﺎﻧﻮﺳﻴﻠﻴﻜﻮن ﺑﺮ ﻣﺆﻟﻔﻪﻫﺎی ﺟﻮاﻧﻪزﻧﻲ ﺑﺬر ﻛﻠﺰا (Brassica napus L.) ﺗﺤﺖ ﺳﻤﻴﺖ ﻛﺎدﻣﻴﻮم

The present experiment was designed to evaluate the effect of nano-silicon priming on germination parameters of rapeseed (Brassica napus L.) under cadmium (Cd) toxicity. Experiment was conducted in factorial based completely randomized design with three replicated in 2013. Treatment were four levels of nano-silicon priming and seven levels of cadmium nitrated. Results indicated that there was a significant interaction between nanopriming and Cd in terms of all studied parameters including germination percentage and index, daily germination rate and days to final germination. In all nano-silicon levels, final germination and daily germination rate of rapeseed showed an increasing response to cadmium toxicity while germination percentage showed a decline trend. The maximum (-0.098) and the minimum (-0.044) decreasing slop of germination percentage and the maximum (0.0001) and the minimum (0.00004) increasing slope of daily germination rate were observed in 20 and 60 mg/L of nano-silicon. Data change trend for germination index in 20 mg/L of nano-silicon was decreasing while exhibits an increasing trend in control. In conclusion, results indicated a positive effect of nano-silicon on daily germination rate and days to final germination of rapeseed under Cd toxicity.