Studies on Cr (III) and Cr (VI) Speciation in the Xylem Sap of Maize Plants

  • S. J. Verma
  • S. Prakash


The toxicity, mobility and bioavailability of chromium, a persistent pollutant depends on its chemical form. Cr (III) is innocuous whereas Cr(VI) is toxic. In vitro studies were carried out using radiotagged Cr (III) and Cr(VI) in the xylem sap of mature maize plants using anion and cation exchange elution chromatography. Xylem sap transports ions to the aerial parts of the plant after absorption by roots. Both Cr (III) and Cr (VI) were present as mobile and soluble anionic organic complexes, probably Cr (III)-citrate in the xylem sap. This indicates a mechanism used by plants for detoxification of toxic Cr (VI) reducing the phytotoxicity via the food chain and providing an opportunity for Phytoremediation.


Anionic Complex Elution Curve Citric Acid Complexation Borosil Glass Vial Organic Acid Complex 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • S. J. Verma
    • 1
  • S. Prakash
    • 2
  1. 1.Dept. of ChemistryT.S Chankaya (Institute of Nautical Sciences)Karave, Navi MumbaiIndia
  2. 2.Dept. of Chemistry, Faculty of ScienceDayalbagh Educational InstituteDayalbagh AgraIndia

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