Effects of Ag and Pb metal accumulation on some biochemical parameters and anatomical characteristics of Sesuvium portulacastrum L. (Aizoaceae) plants

Document Type : Research Paper

Authors

1 Department of Ecology, College of Sciences, University of Basrah, Basrah, Iraq

2 Department of Biology, College of Science, University of Thi-Qar, Iraq

3 Department of Biology, College of Science, University of Basrah, Iraq

4 Department of Biology, College of Science, University of Misan, Iraq

10.22124/cjes.2022.5706

Abstract

The study reported the effect of contamination of Sesuvium portulacastrum L. after exposure to Ag and Pb for four weeks. The results showed that the total protein, chlorophyll, carotene, and biomass declined gradually by elevating   the heavy metal concentrations. Elemental analyses of the leaves were performed using scanning electron microscopy with energy–dispersive- X-ray spectroscopy (SEM-EDS). The main mineral of control treatment contained 11 elements including carbon (57.50%) followed by oxygen (22.76%) and trace iron and lead. The minerals in the leaves treated with 100 mg L-1 Pb exhibited 12 elements with high levels of lead (52.03%). The leaves treated with 100 mg L-1 Ag showed 11 elements with high levels of silver (43.02%) followed by carbon (34.95%) and oxygen (11.18%). Anatomical study indicated that the Ag and Pb can accumulate in internal tissues and causes several alterations such as shape of leaves, stems and roots, as well as thickness and number of cortical parenchymal cells. In addition, unrecognized the endodermis, and exodermis, the root thickness was 663.21 µm in control group, while in Ag and Pb treatments were 498.32 µm and 375.61 µm respectively.

Keywords

References

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Caspian Journal of Environmental Sciences
Volume 20, Issue 3
July 2022
Pages 617-628

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