Anthocyanins, thiols, and antioxidant scavenging enzymes are involved in Lemna gibba tolerance to arsenic

摘要: The influence of arsenic (As) on the growth and antioxidant system Lemna gibba L. exposed to five concentrations As (0.0, 0.25, 0.5, 1.0, 1.5 mg L−1) was studied. Although exposure reduced relative rate, continued grow even after high accumulation this element days exposure. concentration superoxide anion unaffected by As, whereas an increase hydrogen peroxide observed with increasing concentration. Increasing also increased enzyme activity dismutase, peroxidase, glutathione reductase total nonprotein thiols, up 0.5 L−1, anthocyanin content constantly Catalase ascorbate peroxidase activities as well chloroplastic pigments were in plants all concentrations. These results support a major role anthocyanins, scavenging enz...