Abstract
The effect of the dust rejected by the steel complex of El Hadjar (SIDER) studies was by subjecting the mousses and lichens under a treatment by various concentrations of dust. Previously, the chemical composition of this dust was to analyze and show as well the quantitative and qualitative composition of dust and the dust is consisted of the pollutants with rates much higher than those authorized by WHO. All the measured morphophysiology parameters were strongly disturbed by dust in the case of the mousses and as well as that of the lichens. A clear disturbance of the energy respiratory metabolism was observed at the two species study; these disturbances are related to enzymatic dysfunctions likely to diagnose phototoxicity by certain heavy metals. It was concluded that, the dust rejected by SIDER disturbs the morphophysiology and biochemical parameters of the mousses and lichens and on the other hand, its dust strongly inhibits the two energy phenomena study with known breathing and photosynthesis. Key words : Heavy metals, dust, mousses, lichens, breathing.
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