Biological effect of rare-earth elements on anti-oxidation enzymes in wheat under acid rain stress

Based on pot-culture experiments, the biological effect of rare-earth eleme nts (REE) on antioxidation enzymes of wheat under acid rain stress was stud ied. The results show that both acid rain and REE can affect the activity o f anti-oxidation enzymes of wheat to different extents. Under the acid rain stress, anti-oxidation enzymes (CAT, SOD) of wheat showed single peak curv e with the decrease of pH values. After REE were applied, variation of acti vities of anti-oxidation enzymes was relatively stable and the peak value o f variation curve would move in the direction of increased acidity. Under l ow acidity of acid rain, REE could reduce the sensitivity of anti-oxidation enzymes of wheat to acid rain stress significantly and promote the resista nce of anti-oxidation enzymes of wheat to acid rain.