Assessment and comparison of selenium-enriched maize with sodium selenite and sodium selenate

Farzaneh Garousi,Szilvia Veres,Éva Bódi,Béla Kovács,Szilvia Várallyay

doi:10.34101/actaagrar/68/1763

Farzaneh Garousi, Szilvia Veres + Show 3 more

Open Access

https://doi.org/10.34101/actaagrar/68/1763

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Abstract

Selenium is an element of environmental interest owing to the narrow range between its nutritionally required and toxic concentrations in many organisms. Its mobility and bioavailability differ greatly depending on individual Se species. In this regard, in present study, the uptake and distribution of Se, the changes in Se content, and the effects of different concentration of Se in two forms of sodium selenite and sodium selenate on maize plants were measured in nutrient solution experiments to clarify their response to the two forms of Se. The results revealed that the Se content in shoots and roots of maize plants significantly increased as the Se level increased. Two Se forms behaved differently and the effects of toxic damage in samples which had been treated with selenite were much more than in the selenate treatments.

Highlights

Selenium (Se) is a naturally occurring trace element which is toxic at high concentrations, but it is an essential element for many organisms (Fan et al 2002)
Se can be toxic when ingested in high concentrations (Gaso et al 2000, Hartikainen 2005)
Our experiment showed the Se content in shoots and roots of maize increased as the Se concentration applied increased

Summary

Introduction

Selenium (Se) is a naturally occurring trace element which is toxic at high concentrations, but it is an essential element for many organisms (Fan et al 2002). Due to the high solubility of selenite (SeIV) and selenate (SeVI), these forms are more available to plants (Carvalho and Martin 2001) and are important in bio geological and biochemical cycle of Se but since they exhibit different biochemical properties, their toxicity and energy consumption during uptake and metabolism are different (Shen et al 1997, Weiller et al 2004). Maize is nonSe-accumulator plant and the threshold Se toxicity concentration is dependent on the form of Se accumulated (Terry et al 2000)

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