COPPER-INDUCED OXIDATIVE STRESS IN MAIZE SHOOTS ( ZEA MAYS L.): H 2 O 2 ACCUMULATION AND PEROXIDASES MODULATION

Bouazizi, Houda and Jouili, H. and Ferjani, E. (2007) COPPER-INDUCED OXIDATIVE STRESS IN MAIZE SHOOTS ( ZEA MAYS L.): H 2 O 2 ACCUMULATION AND PEROXIDASES MODULATION. Acta Biologica Hungarica, 58 (2). pp. 209-218. ISSN 0236-5383

Text abiol.58.2007.2.7.pdf Restricted to Repository staff only until 30 June 2027. Download (171kB)

Abstract

The effect of copper excess on growth, H 2 O 2 level and peroxidase activities were studied in maize shoots. Ten-day-old seedlings were cultured in nutrient solution that contained Cu 2+ ions at various concentra- tions (50 and 100 μM) for seven days. High concentrations of Cu 2+ ions caused significant decrease both in matter production and elongation of maize shoots. In addition, treatment with CuSO 4 increased levels of H 2 O 2 and induced changes in several peroxidase activities. Moreover, the disturbance of the physio- logical parameters was accompanied by the modulation of the peroxidase activities: GPX (Guaiacol per- oxidase, EC 1.11.1.7), CAPX (Coniferyl alcohol peroxidase, EC 1.11.1.4) and APX (Ascorbate peroxi- dase, EC.1.11.1.11). Furthermore, this modulation becomes highly significant, especially, in the presence of 100 μM of CuSO 4 .

Actions (login required)

Edit Item