Abstract
Soil pollution is one of the main environmental stresses due to the effect of various contaminations by heavy metals like lead. The aim of this study is to examine the response of a halophile species Atriplex halimus L. under lead stress. This plant is watered from the germination stage with different concentrations of lead nitrate Pb(NO3)2 1000, 3000, 5000 and 7000 ppm for 100 days. The response of plants is evaluated by an analysis of the growth mass parameters (fresh and dry weight) and biochemical parameters (chlorophyllian pigments, proline and total proteins). The results reveal a growth inhibition of the aerial and root parts by Pb(NO3)2 treatment compared to control. On the other hand, the biochemical response indicates that the amount of chlorophyll pigments reduced by the effect of different treatment of lead. In contrast, proline and total proteins contents increased in leaves and roots of Atriplex halimus L. as a response to stress.
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