Inhibition Effect on the Allium cepa L. Root Growth When Using Hexavalent Chromium-Doped River Waters
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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.
KeywordsDislocating toxicity effect Cr6+-doped river waters
We gratefully acknowledge the Brazilian Light Synchrotron Laboratory for partial financing of this study through the 4654 project.
- APHA, AWWA, WEF (1999) Standard methods for examination of water and wastewater. In: Clescerl LS, Greenberg AE, Eaton AD (eds) 20th edn, Washington, DCGoogle Scholar
- Brazil (2005) Brazilian government environmental norm – CONAMA 357. In: Water quality conditions and standards (in portuguese), on March 17th 2005, pp 5–12. Available in http://www.mma.gov.br/port/conama/res/res05/res35705.pdf. Accessed 15 Jun 2008
- Kumar D, Sinha SP (1989) Threshold dose of cytogenetic toxicity of Lindane, Malthion and Metacid in Allium cepa root-tip cells. Cytologia 54:547–552Google Scholar
- Palácio SM, Espinoza-Quiñones FR, Galante RM, Zenatti DC, Seolatto AA, Lorenz EK, Zacarkim CE, Rossi N, Rizzutto MA, Tabacniks MH (2005) Correlation between heavy metal ions (Copper, Zinc, Lead) concentrations and root length of Allium cepa L. in polluted river water. Braz Arch Biol Technol 48:191–196CrossRefGoogle Scholar
- Van Espen P, Janssens K, Swenters I (1986) AXIL X-ray analysis software. Canberra Packard, BeneluxGoogle Scholar