Abstract
This study was set to investigate the effect of the presence of hemoglobin (Hb) in cadmium (Cd)-contaminated soil on phytotoxicity and Cd accumulation. The effect of Hb on the Cd accumulation by Pisum sativum L. (pea) and seed germination and growth was studied using pot tests with the artificially Cd-contaminated soil. The results show that the externally applied Hb to Cd-contaminated soil samples did not promote Cd accumulation by P. sativum. However, the Fe accumulation was greater in the presence of Hb. The seed germination was not affected, but the adverse effects on the plant growth increased with increasing Hb/Cd molar ratio from 0 to 0.015. This can be attributed to toxic effects of the Fe added with the Hb application. The results suggest that the presence of Hb may have harmful effects on pea plants used in phytoremediation of Cd-contaminated soil due to toxic effects imposed by Fe.
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