Root systems (roots and rhizomes) of giant reed,
which had begun to sprout, were also collected fromZhuzhou district in Hunan Province, China.Concentrations of As, Cd and Pb in rhizome cuttingswere 0.03, 0.01 and 0.07 mg/kg, respectively. Uniformsize root systems cutting per pot were cultivated under laboratory condition in modified Hoagland solution for pre-culture.