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Physiological and Pigment variations in Talinum triangulare (Jacq.) Willd. grown on Chromium polluted Soil treated with Chelants

Author Affiliations

  • 1* Department of Biotechnology, School of Life Sciences, Karpagam University, Eachanari, Coimbatore, Tamilnadu, INDIA

Int. Res. J. Environment Sci., Volume 2, Issue (12), Pages 6-12, December,22 (2013)


A study was conducted in an artificially polluted soil to evaluate the growth of Talinum triangulare under varying concentrations of two different chelants- EDTA and citric acid either separately or in combination. The performance of these chelants in promoting plant growth under chromium pollution was also studied which would help in selection of the chelant to be employed for any further chelant assisted phytoremediation techniques. It was found that increase in concentration of chelants above 500mg/kg in case of EDTA, 750mg/kg of mixed chelants produced toxicity symptoms in the plant. At a specific concentration of each chelant, growth was induced and later decreased showing that higher concentration of chelants may itself pose toxicity to the plants which are already facing metal stress. Therefore selection of the chelant and also the concentration to be employed becomes a necessary part of chelant assisted phytoremediation. From this study it can be stated that a safer removal of chromium can be brought about by employing citric acid which does not lead to any toxicity.


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