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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Cadmium and copper induction of oxidative stress and antioxidative response in tomato (Solanum lycopersicon) leaves
Plant Growth Regulation, Volume 57, No. 1, Year 2009
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Description
We compare cadmium and copper induced oxidative stress in tomato leaves and the antioxidative enzyme response during a time course of 96 h. Plants were subjected to 25 μM of CdCl2 or CuSO4 and malondialdehyde (MDA) level and activity of guaiacol peroxidase, superoxide dismutase, catalase, ascorbate peroxidase and glutathione reductase were determined. The results showed that there was an early increase in the MDA level and in the guaiacol peroxidase activity more pronounced with copper exposure during almost all the time course of the experiment. The activity of superoxide dismutase and catalase was induced very early after cadmium and copper treatment, reached a maximal value after 12 h and then declined but it remained always slightly higher than the control at the end of the experiment. Ascorbate peroxidase activity pathway was similar to superoxide dismutase or catalase with a maximal activity after 48 h of heavy metal exposure. Induction of glutathione reductase activity observed only under copper exposure is maintained during almost all the experimental time. The antioxidative activity developed by tomato leaves is more induced by copper treatment. This can be related to the ability of this metal to induce more than cadmium an accumulation of reactive oxygen species (ROS) at the cellular level. Decline in the antioxidative enzymes activity at the end of the experiment can be a consequence of cadmium- and copper-inducing a further ROS formation that might affect enzymes activity. © 2008 Springer Science+Business Media B.V.
Authors & Co-Authors
Chamseddine, Mediouni
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
France, Strasbourg
Institut de Biologie Moléculaire Des Plantes
Ben Ammar, Wided
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Guy, Houlné
France, Strasbourg
Institut de Biologie Moléculaire Des Plantes
Marie-Edith, Chabouté
France, Strasbourg
Institut de Biologie Moléculaire Des Plantes
Fatma, Jemal
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Statistics
Citations: 82
Authors: 5
Affiliations: 2
Identifiers
Doi:
10.1007/s10725-008-9324-1
ISSN:
01676903
e-ISSN:
15735087
Study Approach
Quantitative