Improved fluorimetric measurement of uranium uptake and distribution in spring wheat (Triticum aestivum L.)

Author:

Borcia Cătălin1,Popa Karin2,Cecal Alexandru2,Murariu Manuela3

Affiliation:

1. “Alexandru Ioan Cuza” University, Department of Physics, 11 – Carol I Blvd., 700506 – Iaşi, Romania

2. “Alexandru Ioan Cuza” University, Department of Chemistry, 11 – Carol I Blvd., 700506 – Iaşi, Romania

3. “Petru Poni” Institute of Macromolecular Chemistry, 41A – Grigore Ghica Voda Alley, 700487 – Iaşi, Romania

Abstract

Abstract Uranium uptake and (radio)toxicity was tested on spring wheat (Triticum aestivum L.) in a laboratory study using differently concentrated uranium nitrate solutions. Within these experiments, two analytical assays of uranium were comparatively tested: a fast and improved fluorimetric assay and the classical colorimetric (U(IV)–arsenazo(III) complexation) one. During the germination, the wheat seeds and plantlets supported well the uranium solutions of treatment within the entire concentration range (1E-4–5E-3 M). Uranium proved to be non (radio)toxic to wheat as compared with other natural and anthropogenic radiocations, probably because its uptake by spring wheat during the germination is low. Indeed, only a small fraction of uranium administered was located within the roots, whereas the uranium content of the stems was negligible. A high correlation between the results obtained by two analytical methods was found. However, the fluorimetric assay proved to be more reliable and fast, and accurate.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry

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