Effects of carboxylic and amino acids on Cd uptake by Lycopersicum esculentum

Authors: Nigam, R.; Srivastava, M. M.

Source: Chemical Speciation and Bioavailability, Volume 17, Number 1, February 2005 , pp. 19-26(8)

Publisher: Science Reviews 2000 Ltd

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Abstract:

Pot experiments (sand and soil cultures) have been conducted to investigate the effect of various organic (carboxylic and amino) acids on mobilization of soil cadmium in the tomato plant (Lycopersicum esculentum). Statistically significant increases in plant Cd enrichment in the presence of increasing organic acid supplementation, suggest the existence of Cd-organic acid interactions in the rhizosphere environment of the plant. Higher cadmium accumulation (bioavailability) from organic acid treatments is discussed on the basis of the potential of organic acids to form complexes with cadmium. Amino acids are found to be less effective in the mobilization of Cd compared to carboxylic acids. Separate experiments are performed to synthesize and estimate different forms of organically bound cadmium, using a combination of radiotracer Cd-115m and ion exchangers [Dowex-50, Dowex-1 and XAD-2 resin]. The chemical nature of organically bound cadmium has been ascertained by electrophoretic assay.

Keywords: cadmium uptake; tomato plant; organic acids

Document Type: Research article

DOI: http://dx.doi.org/10.3184/095422905782774973

Affiliations: 1: Department of Chemistry, Faculty of Science, Dayalbagh Educational Institute, Dayalbagh, Agra-282005, India

Publication date: 2005-02-10

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Chemical Speciation & Bioavailability covers a rapidly expanding area in environmental science.
Research on the interactions between the chemical forms and behaviour of toxic compounds and their subsequent biological uptake, metabolism and ecological fate involves many scientific fields. These studies are often published in discipline-specific journals, leading to inadequate review and information scatter. This situation hinders both the development of an international community of experienced colleagues and the open flow of information and discussion. Additionally, the importance of speciation and bioavailability research to the development of pollution law and control technologies is being increasingly appreciated by environmental regulatory agencies throughout the world.
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Effects of carboxylic and amino acids on Cd uptake by Lycopersicum esculentum

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