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Nutritional quality of bean seeds harvested from plants grown in different soils amended with coated and uncoated zinc oxide nanomaterials

Abstract

The effects of soil properties on nanomaterial (NMs) interactions with plants are not well understood. Bean (Phaseolus vulgaris) plants were grown to maturity in natural soil (NS) or organic matter (OM)-enriched soil (ES) amended with either uncoated (Z-COTE), hydrophobically-coated (Z-COTE HP1) ZnO NMs, bulk ZnO, or ZnCl2 at 0-500 mg/kg. At harvest, yield and seed nutrient composition were assessed. The interaction of soil × compounds reduced the maturation time by about 25 days and increased seed yield (~155%) in ES, compared to NS. In NS, ZnCl2 at 125 mg/kg reduced seed protein by 10%, compared withn control, and disregarding the concentration, seeds from ZnCl2 showed the highest relative sugar content (102%, compared with the other compounds); while in NS, seeds from Z-COTE HP1 accumulated the highest relative sugar (44% more than Z-COTE and ZnCl2). In addition, seeds from ES + Z-COTE HP1 had 19% less Zn than the rest of the compounds. In ES, the OM enrichment and pH reduction enhanced the accumulation of Zn (38%), K (64%), S (44%), P (83%), Mg (86%), Ca (70%), Fe (89%), and Mn (85%), but reduced Mo under Z-COTE HP1 and ZnCl2 exposure, compared with NS seeds. Compared to controls, ZnCl2 at 500 mg/kg reduced K in NS and ES (25% and 13%) but increase P in NS (66%). In general, Z-COTE and Z-COTE HP1 affected seed nutritional elements in a similar manner. However, results indicate that the effects of ZnO NMs in bean plants vary with soil composition.

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Publication details

The article was received on 01 Jun 2017, accepted on 06 Oct 2017 and first published on 12 Oct 2017


Article type: Paper
DOI: 10.1039/C7EN00495H
Citation: Environ. Sci.: Nano, 2017, Accepted Manuscript
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    Nutritional quality of bean seeds harvested from plants grown in different soils amended with coated and uncoated zinc oxide nanomaterials

    I. A. Medina-Velo, O. Dominguez, L. Ochoa, A. C. Barrios, J. Hernandez-Viezcas, J. White, J. R. Peralta-Videa and J. Gardea-Torresdey, Environ. Sci.: Nano, 2017, Accepted Manuscript , DOI: 10.1039/C7EN00495H

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