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Inhibition Effect on the Allium cepa L. Root Growth When Using Hexavalent Chromium-Doped River Waters


The effect of Cr6+ on Allium cepa root length was studied using both clean and polluted river waters. Seven series of Cr6+-doped polluted and non-polluted river waters were used to grow onions. Chromium concentration (Cr6+) of 4.2 mg L−1(EC50 value), doped in clean river water caused a 50% reduction of root length, while in organically polluted samples similar root growth inhibition occurred at 12.0 mg Cr6+ L−1. The results suggested that there was a dislocation to higher values in toxic chromium concentration in polluted river water due to the eutrophization level of river water.

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We gratefully acknowledge the Brazilian Light Synchrotron Laboratory for partial financing of this study through the 4654 project.

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Correspondence to F. R. Espinoza-Quiñones.

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Espinoza-Quiñones, F.R., Szymanski, N., Palácio, S.M. et al. Inhibition Effect on the Allium cepa L. Root Growth When Using Hexavalent Chromium-Doped River Waters. Bull Environ Contam Toxicol 82, 767–771 (2009).

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  • Dislocating toxicity effect
  • Cr6+-doped river waters