Accumulation of Pb and Cu in different parts of a groundnut plant (Arachis hypogaea) under laboratory conditions

This study focused on the accumulations of Pb and Cu in different parts of Arachis hypogaea exposured to each metal separately under laboratory conditions. Three replications and a randomized complete block design were used in this study. About 3.5 kg of air-dried soil was placed into a 17 × 18 cm poly bag, using a soil mixture (loam soil: organic fertilizer: sand) in a 3:2:1 ratio for the different treatments. For the plants exposed to Cu and Pb, approximately 100 ml of solution was applied twice, during weeks 4 and 5 of the flowering stage. The plants were harvested 90 days after germination. Soil samples were also collected to determine the concentrations of Cu and Pb. The accumulation pattern observed was roots > seeds (with hulls) > stems > leaves for both Cu and Pb treated plants, and the control plants exhibited a similar distribution of metals across plant parts. These findings highlight the potential of A. hypogaea as a biomonitor in future research.

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