6Arduini I, Godbold D L, Onnis A. Cadmium and copper change root growth and morphology of Pinus pinca and Pinus pinaster seedlings[J]. Physiol Plant, 1994,92: 675-680.
7Strange J, Macbaur M R. Evidence for a role for the cell membrane in copper tolerance[J]. New physiol, 1991,119:383-388.