Investigation in some enzyme activities at cress (Lepidium sativum) interacted with metals

Key words: cress (Lepidium Sativum), superoxide dismutase, catalase, peroxidase, polyphenol oxidase, Fe, Cu, Co, Pb, CdIn this study, the cress (Lepidium Sativum) plant superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) and polyphenol oxidase (PPO) activities were investigated for the plant on the basis of the elements Fe, Cu and non-essential elements of the Co, Pb and Cd. Environment where of plants raised , FeCl2, CuSO4, Pb (NO3) 2, CoCl2 and CdCl2 were applied with an interval of 2 days with different concentrations solutions as stress factors. Plants were harvested 4-5 sheets when size reached a certain. Plant leaves were extracted and enzyme was obtained. SOD, CAT, POD and PPO activities were measured from these enzymes.Generally, SOD, CAT, POD, PPO activities were increased as a result of statistical Fe, Cu, Co, Pb and Cd stresses. SOD, CAT, POD, PPO enzymes are known to play important roles in the plant response to stress. As a result, the important roles of these enzymes are thought Fe, Cu, Co, Pb and Cd in the removal of the effects of stress.