Effect of pollution on the chemical content and secondary metabolites of and

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Abstract

Objectives
This study investigated the uptake and translocation pattern of trace metals from two medicinal plant species namely: and from two contaminated sites and a noncontaminated (NC) site. The effects of heavy metals on the amino acids and secondary metabolites of the tested plant species were assessed.
Materials and methods
Medicinal plant samples and soil samples were collected from three different sites: two contaminated and one NC site. The concentration levels (mg/kg) of the selected trace metals (Al, B, Cr, Cu, Fe, Mn, Mo, Pb, V, and Zn) were estimated in the tested plant species and associated soil.
Results
Heavy metal contents in the investigated plant species reflected the metal concentration in the soil samples. The highest content of the determined heavy metals were detected in both tested plants from contaminated sites in comparison with those from the NC site.
Conclusion
The plants collected from the investigated sites pose a serious danger. However, a periodical assessment of plants used for traditional medicine should be encouraged as this will assist in ensuring their quality and safety in herbal use, especially for people living in urban areas where the level of pollution may be very high.

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