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Reading: Phytoextractive potential among mustard (Brassica juncea) genotypes in Sri Lanka

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Phytoextractive potential among mustard (Brassica juncea) genotypes in Sri Lanka

Authors:

Shyama R Weerakoon ,

Department of Botany, Open University, Nawala, Sri Lanka, LK
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S Somaratne

Department of Botany, Open University, Nawala, Sri Lanka, LK
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Abstract

Heavy metal pollution in soil and water is a global environmental concern. In Sri Lanka, accumulation of heavy metals in soil, water and plant/animal biomass has been widely reported. Phytoremediation, the use of plants and their associated microbes, is an emerging, low-cost, environmental-friendly approach in the cleanup and prevention of environmental pollution. Indian Mustard (Brassica juncea) has been widely used to extract toxic metals from contaminated soils worldwide. Sri Lanka has a genetically diverse mustard collection, but their phytoextarctive potentials are yet to be determined. Present study was conducted to evaluate variation in phytoextractive ability of soil-borne heavy metals by ten different mustard accessions. Heavy metal contents (Mn, Co, Pb and Zn) in 12-week-old mustard plants (whole plant) were estimated during Maha and Yala in 2007-2008 using Atomic Absorption Spectroscopy. Heavy metal content in soils where the plants were grown was also assessed during the two seasons. Soil Mn and Co concentrations were significantly high in Maha than in Yala. Difference in heavy metal concentrations in mustard accessions between the two seasons was not significant. However, significantly high concentrations of Mn were found in accessions 7788, 515 and 8831 (236, 225, 220x102 μg/g). Cobolt (Co) was significantly high in accession 5088 (238x102 μg/g). Lead (Pb) concentrations were significantly high in accessions 8831 (156x102 μg/g) and 5088 (148x102 μg/g) and Zn was significantly high in accession 501 (6413x102 μg/g). The study suggests that screening the entire mustard germplasm in Sri Lanka is worthwhile to identify potential heavy metal accumulators.

Key words: heavy metal hyperaccumulation; phytoremediation

DOI: 10.4038/cjsbs.v38i2.1862

Cey. J. Sci. (Bio. Sci.) 38 (2): 85-93, 2009

DOI: http://doi.org/10.4038/cjsbs.v38i2.1862
How to Cite: Weerakoon, S.R. & Somaratne, S., (2010). Phytoextractive potential among mustard (Brassica juncea) genotypes in Sri Lanka. Ceylon Journal of Science (Biological Sciences). 38(2), pp.85–93. DOI: http://doi.org/10.4038/cjsbs.v38i2.1862
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Published on 26 Apr 2010.
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