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Environmental Pollution and Relationship Between Total Antioxidant Capacity and Heavy Metals (Pb, Cd, Zn, Mn, and Fe) in Solanum tuberosum L. and Allium cepa L.

ABSTRACT In the natural environment, plants are exposed to different stress factors that are responsible for overproduction of reactive oxygen species. Exposure to heavy metals is one of these factors. The present article highlights the correlation between the effects of bioaccumulation of heavy metals in a highly polluted region as the industrial zone of the Thermo Power Plants “Kosova” in Kosovo on the antioxidant capacity of two selected target species: Solanum tuberosum L. and Allium cepa L. The results show that environmental pollution in the industrial zone of the Thermo Power Plants “Kosova” generates a significant bioaccumulation of heavy metals such as Pb, Cd, Zn, Mn, and Fe. The high concentration of heavy metals leads to an increased production of reactive radical species. The extracts of target plants cultivated in this region display a lower antioxidant capacity than the same plants grown in a control rural area. The Fe bioaccumulation markedly influences the antioxidant capacity of plant samples analyzed.