Abstract:

Abstract：Effect of exogenous abscisic acid on the tolerance of copper in four-leaf-stage seedling of Wuyunjing 7 and Kanto 194 was studied. Results showed that with the increasing of the concentration of copper stress, chlorophyll content, the activity of CAT, and the content of soluble protein decreased. At the same time, the activity of SOD first increased and then decreased. However, the activity of POD, and permeability of cell membrane increased. Meanwhile, there were not obviously differences on the compositions of soluble protein. Therefore, using a certain concentration of exogenous abscisic acid to relieve the damage of copper stress can be considered in production practice.