Accumulation of cuprum and cadmium and their effects on the antioxidant enzymes in Boettcherisca peregrina exposed to cuprum and cadmium
铜和镉在棕尾别麻蝇体内的累积及其对三种抗氧化酶活性的影响

In Boettcherisca peregrina,changes in the activities of three species of antioxidant enzymes including superoxide dismutase(SOD),catalase(CAT) and peroxidase(POD) were measured together with patterns of cuprum or cadmium accumulation as the newly hatched fly larvae were exposed to the diet containing cuprum(Cu) or cadmium(Cd).The results showed that the Cu or Cd content of the fly bodies increased markedly during larval stage depending on the time after exposure to Cu or Cd,and decreased until pupation.Cu(or Cd) exposure resulted in that the activities of SOD and CAT in the flies were significantly inhibited with an increase of Cu or Cd exposure concentration.In contrast,the activity of POD in the flies was inhibited by exposure to Cu or Cd of relatively high concentration,but was enhanced by exposure to Cu or Cd of relatively low concentration.