The antixidation responses of two ecotype leaves of diversifoliouspoplar (Populus euphratica) to pest

The broadovate and lanceolate are two main ecotypes leaves of Populus euphratica. In the study, the release of reactive oxygen and activity of antioxidase (SOD, CAT and POD) of two leaves in P. euphratica were compared when they suffered from the pest. This study showed that the pest increased the content of O-2. and H2O2 and activities of SOD, CAT and POD in the leaves, and antixidation enzyme changes in the broadovate leaves was higher than that in the lanceolate leaves, especially for POD, implying that the broadovate leaves showed a more pest stress than lanceolate leaves.