[Effect of insect pest on activated oxygen metabolism in lanceolate leaves of Populus euphratica under different...

This paper studied the effect of insect pest on the activities of protective enzymes SOD and CAT and the contents of H2O2 and O2*- in lanceolate leaves of Populus euphratica under different soil water conditions. The results showed that soil water deficiency did not increase SOD and CAT activities and H2O2 and O2*- contents in lanceolate leaves, but under this condition, insect pest increased them. When soil water was abundance, insect pest couldn't increase the activities of SOD and CAT and the contents of H2O2 and O2*- in lanceolate leaves. It's concluded that insect pest had an important role in death of Populus euphratica under soil water deficiency.