X-ray spectroscopy uncovering the effects of Cu based nanoparticle concentration and structure on Phaseolus vulgaris germination and seedling development.

N.M. Duran, S.M. Savassa, R. Lima, R. De Almeida, F. Linhares, C.A.M. van Gestel, H.W. Pereira de Carvalho

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    Abstract

    Nanoparticles properties such as solubility, tunable surface charges, and singular reactivity might be explored to improve the performance of fertilizers. Nevertheless, these unique properties may also bring risks to the environment since the fate of nanoparticles is poorly understood. This study investigated the impact of a range of CuO nanoparticles sizes and concentrations on the germination and seedling development of Phaseolus vulgaris L. Nanoparticles did not affect seed germination, but seedling weight gain was promoted by 100 mg Cu L-1 and inhibited by 1 000 mg Cu L-1 of 25 nm CuO and CuSO4. Most of the Cu taken up remained in the seed coat with Cu hotspots in the hilum. X-ray absorption spectroscopy unraveled that most of the Cu remained in its pristine form. The higher surface reactivity of the 25 nm CuO nanoparticles might be responsible for its deleterious effects. The present study therefore highlights the importance of the nanoparticle structure for its physiological impacts.

    Original languageEnglish
    Pages (from-to)7874-7884
    Number of pages11
    JournalJournal of Agricultural and Food Chemistry
    Volume65
    Issue number36
    Early online date29 Aug 2017
    DOIs
    Publication statusPublished - 13 Sept 2017

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