Effects of salt stress on physiological characteristics of Eucommia ulmoides seedlings

This paker was aimed to study the physiological response of Eucommia ulmoides seedlings to salt stress, explore the mechanism of salt tolerance of E. ulmoides, breed salt-tolerant varieties of E. ulmoides. The results showed that the rate of response and suffer symptoms of the salt damage of leaves continued to increase with the stress concentration and duration. Plasma membrane permeability, chlorophyll content, SOD activity and proline content gradually increased along with the increase of NaCl concentration and the prolongation of treatment time. Increasing trend was not obvious under low salinity stress, was rapid under middle and high salinity stress, and it began to decline when the salinity stress was up to a certain extent. The salt resistance of different varieties of E. ulmoides existed obvious differences, JC159 and JC009 had high salt resistance, the salt resistance of JC119 and JC144 was relatively weak.