Effet du plomb sur les paramètres morpho-physiologiques de Moringa oleifera L.

Abstract

Lead is one of the heavy metals considered as an environmental pollutant, causing many toxic effects, especially during high dose exposure. It causes disturbances in all systems of the human organism, as well as on many physiological mechanisms of plants. One of the ecological solutions for this problem and soil remediation is to use heavy metal storage plants (phytoremediation). In this context, the objective of this work is to study the potential of Moringa oleifera L. to withstand large doses of lead and its ability to clean up lead contaminated soil. The study involves the application of five doses of lead (0, 3, 5 and 10 mM) to Moringa oleifera L. Morphophysiological analysis of the application of increasing doses of lead to Moringa oleifera L. shows that it has a negative effect on plants and results in growth inhibition, with a reduction in root length and a decrease in stem height, as well as a decrease in the production of fresh and dry material of the aerial and root parts of Moringa oleifera L. compared with controls and a decrease in leaf chlorophyllian pigment content ( chlorophyll a, b and total) relative to the controls.