Ecology, Environment and Conservation Paper

Vol.14, Issue 2-3, 2008; Page No.(417-423)

PYTOEXTRACTION 01!EACI FROM SOIL BY SORNACIONE SPECIES OF BRASSICA JUNCEA PUSA JAI KISAN

Syeda Azeem Unnisa, P.Chandra Sekhar Reddy and P. Seshabala

Abstract

Phytoextraction is gaining acceptance as a cost -effective and environmentally friendly phytoremediation strategy for reducing toxic metal levels from contaminated soils. Cognizant potential of this phytoremediation tectmique as an alternative to expensive engineering - based remediation technologies, experiments were conducted to evaluate the suitability of some plants as phytoextTaction species. From one of our preliminary studies, we found that somaclone of mustard designated as Indian mustard (Brassica.juncea L. - Pusa Jai Kisan (BI0902) can tolerate and accumulate significant amounts of lead (Pb) in its shoots when grown in lead amended soil and study was conducted to determine whether the addition of EDTA can further enhance the shoot uptake of Pb. Seeds were planted in mud pots and spiked with (0, 1000, 2000 mg Pb/ kg dry soil) of lead. At five weeks after planting, aqueous solution (5 mmol/ kg dry soil) of EDTA was applied to the root zone, and all plants were harvested at six weeks. Results revealed that B.juncea L. pusa jai kisan (BI0902) was relatively tolerant to moderate levels of Pb as shown by non-significant differences in root and shoot biomass among treatment and addition of chelate (EDTA) enhance the lead accumulation in plants.

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