Effects of copper on Allium sativum and accumulation of Cu2+ by its roots,bulbs and shoots
The effects of different concentrations of copper sulfate onroots,bulbs and shoots of Allium sativum L.,and accumulation of Cu2+ by its roots bulbs and shoots investigated in the present study.The concentrations of copper sulfate (CuSO4·5H2O) used were in the range of 10-6～10-4 mol/L.The results from this investigation indicated that the seedlings of A.sativum exposed to 10-5～10-4 mol/L Cu2+ exhibited substantial growth reduction.The leaves treated with the same Cu2+ concentrations were also obviously inhibited.A.sativum has potential ability to accumulate Cu2+ it.The Cu content in roots increased with increasing solution concentration of Cu2+.The roots in plants exposed to 10-4 mol/L Cu2+ accumulated large amounts of Cu2+.The Cu ions accumulated mainly in the roots,and small amounts of Cu2+ were translocated to the bulbs and leaves at concentration of 10-4～10-5mol/L Cu2+
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