Physiological and Biochemical Response of Berberis integerrima and Cercis siliquastrum to cadmium and lead stress

摘要

Plant species have various physiological and biochemical mechanisms to tolerate and adapt to environmental stresses. The present study was aimed to evaluate oxidative stress of Cd and Pb on Berberis integerrima and Cercis siliquastrum. For this purpose, three-year-old seedlings with various concentrations (1000, 2000, 4000 and 6000 ppm) of Cd and Pb for 45 days in 15-day intervals were selected, and photosynthetic pigments content, malondialdehyde (MDA), proline, and catalase(CAT)were investigated as markers of oxidative stress. The results showed that chlorophyll remained unchanged in Cd stress where as in Pb treatment decreased. In addition, Carotenoid increased in both treatments. MDA content and proline also increased in both treatments. The response of antioxidant enzymes to Cd and Pb treatments was different in both species. Berberis integerrima and Cercis siliquastrum have different response to Cd and Pb treatments that the reason due to different physiological and biochemical responses of plants to environmental stresses.The results of this study can be used to choose the most appropriate plant according to the related stress especially under pollution stress.