Impact of copper on reactive oxygen species, lipid peroxidation and antioxidants in Lemna minor

Abstract

Lemna minor L. treated with 20, 50, or 100 μM CuSO4 accumulated Cu and reactive oxygen species (hydrogen peroxide and superoxide radical) in frond and root cells. The time-course analysis of lipid peroxidation showed high increment in malondialdehyde production only after 12 and 48 h of Cu treatment. Guaiacol peroxidase and superoxide dismutase activities decreased after 48 h while glutathione reductase activity enhanced 48 h after Cu-treatment. Ascorbate and glutathione contents increased with the increasing Cu stress. © 2008 Springer Science+Business Media B.V.