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International Journal of Microbiology
Volume 2017, Article ID 9869145, 7 pages
https://doi.org/10.1155/2017/9869145
Research Article

Assessment of Resistance and Bioremediation Ability of Lactobacillus Strains to Lead and Cadmium

1Department of Microbiology, Kazan Federal University, Kremlevskaya St. 18, Kazan 420008, Russia
2Bionanotechnology Lab, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kreml uramı 18, Kazan, Tatarstan 420008, Russia
3Institute of Physics, Kazan Federal University, Kremlevskaya St. 16, Kazan 420008, Russia

Correspondence should be addressed to Dina R. Yarullina; moc.liamg@sefsak

Received 5 October 2016; Accepted 15 December 2016; Published 4 January 2017

Academic Editor: Joseph Falkinham

Copyright © 2017 Anna V. Kirillova et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Cadmium (Cd) and lead (Pb) are heavy metals, important environmental pollutants, and potent toxicants to organism. Lactic acid bacteria (LAB) have been reported to remove Cd and Pb from solutions and therefore represent a useful tool for decontamination of food and beverages from heavy metals. Heavy metal ion binding by LAB was reported as metabolism-independent surface process. In this work ten Lactobacillus strains were investigated with respect to hydrophobicity, Lewis acid-base, and electrostatic properties of their outer cell surface in order to characterize their Cd and Pb removal capacity. Seven L. plantarum and L. fermentum strains were shown to remove Cd from culture medium. The metabolism-dependent accumulation mechanism of Cd removal was proposed based on extended character of Cd binding and lack of correlation between any of the surface characteristics and Cd removal. The results of this study should be considered when selecting probiotic strains for people at risk of Cd exposure.