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Abstract
Parsley (Petroselinum crispum) was grown in chromium (Cr) rich medium under hydroponic conditions to explore Cr bioaccumulation in various plant organs. Parsley plants were grown under greenhouse conditions in pots containing a Hoagland solution along various metal concentrations. Treatments included control (without metal) and six doses of Cr as potassium dichromate for 15 days. In general, Cr accumulation linearly rose in roots, stems, and leaves with the increasing Cr concentrations up to 100 mg/L. Beyond 100 mg/L, bioaccumulation gradually decreased which might be indicative of Cr toxicity to parsley. Overall, Cr accumulation in various plant organs was in the following order: leaves > roots > stem. Bioaccumulation factor and translocation factor increased as a function of Cr concentrations. Owing to Cr bioaccumulation in various plant organs especially stem, agronomists need to pay special attention to growth medium contamination. In addition, plants may serve as useful bioresource to remediate metal polluted sites.
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