| Autor: |
Akinyemi AJ; Department of Chemical Sciences, Biochemistry Unit, Afe Babalola University, Private Mail Bag 5454, Ado-Ekiti, Nigeria. ajakinyemi2010@yahoo.co.uk., Faboya OL; Department of Chemical Sciences, Chemistry Unit, Afe Babalola University, Private Mail Bag 5454, Ado-Ekiti, Nigeria., Olayide I; Department of Chemical Sciences, Biochemistry Unit, Afe Babalola University, Private Mail Bag 5454, Ado-Ekiti, Nigeria., Faboya OA; Department of Medical Biochemistry, Ekiti State University, Ado-Ekiti, Ekiti State, Nigeria., Ijabadeniyi T; Department of Chemical Sciences, Chemistry Unit, Afe Babalola University, Private Mail Bag 5454, Ado-Ekiti, Nigeria. |
| Abstrakt: |
Cadmium (Cd) is one of the most toxic heavy metals that inhibit physiological processes of plants. Hence, the present study sought to investigate the effect of cadmium-contaminated seeds from two varieties of maize (Zea mays) on non-enzymatic antioxidant and nitric oxide levels. Seeds of yellow and white maize were exposed to different concentrations of Cd (0, 1, 3 and 5 ppm) for two weeks. The results from this study revealed that both varieties of maize bio-accumulate Cd in leaves in a dose-dependent manner. In addition, Cd exposure caused a significant (p < 0.05) decrease in total phenolic, GSH and nitric oxide (NO) levels at the highest concentration tested when compared with control. Therefore, the observed decrease in NO and endogenous antioxidant status by Cd treatment in maize plants could suggest some possible mechanism of action for Cd-induced oxidative stress and counteracting effect of the plants against Cd toxicity. |
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