Indian Journal of Science and Technology
Year: 2012, Volume: 5, Issue: 11, Pages: 1-8
L.Naser karimi*1 , Masumeh Khanahmadi*2 , Bahareh Moradi3
1 Department of Biology, Faculty of Science, Razi University,
2 Department of Chemistry, Kermanshah Branch of ACECR,
3 Department of Biology, Islamic Azad University,
*1 [email protected]; [email protected], *2 [email protected]
*Author For Correspondence
Department of Biology
Email: [email protected]
Effects of different lead concentration (0, 100, 200, 400, 600, 800, 1000 and1500 µM) on growth, pigment concentration, biochemical parameters and lead accumulation in Cynara scolymus L. (artichoke) were investigated. The experiment was conducted hydroponically in a lead spiked solution. The lead toxicity exhibited a decline in growth and chlorophyll content of artichoke at elevated concentrations (>100 µM). In contrast, proline and total soluble sugar increased significantly as lead concentration augmented. The accumulation of lead was found to increase in a concentration dependent manner with a maximum of 411 mg kg-1 at 1500 µM. Root accumulated more lead than shoot. The loss of chlorophyll content was associated with disturbances in photosynthetic capacity which ultimately results in the reduction of artichoke growth. Increase proline and total soluble sugar content suggest that compatible solutes may contribute to osmotic adjustment at the cellular level and enzyme protection stabilizing the structure of macromolecules and organelles. The higher lead uptake and root to shoot translocation efficiencies than none accumulating plants was indicative of its greater lead accumulating capacity. Collectively, our results indicate that artichoke has physiological traits associated with accumulation of lead to relative high levels and it can be useful for restoring lead-contaminated sites.
Keywords: Artichoke, Bioaccumulation, Chlorophyll pigments, Lead pollution, Proline , phytoextraction, Phytoremediation
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