Jump to main content
Jump to site search


Exploring the chelation-based plant strategy for iron oxide nanoparticle uptake in garden cress (Lepidium sativum) using magnetic particle spectrometry

Author affiliations

Abstract

Although iron is one of Earth's most abundant elements, its availability to plants remains an agricultural challenge, particularly in high pH environments. At high pH, iron forms insoluble ferric oxide–hydroxides that makes it inaccessible to plants. It is estimated that 30% of the world's cropland is too alkaline for optimal plant growth. Staple crops, like rice, are particularly susceptible to iron deficiency, thereby, necessitating the need for continued research in developing iron-based fertilizers. Recent studies have demonstrated the potential of using iron oxide nanoparticles (IONPs) as fertilizers to address iron deficiency in plants, but some studies have generated conflicting results. One of the major challenges associated in investigating IONP plant uptake and translocation is the inability to distinguish between intact IONPs versus leached iron ions. In this study, we utilized a new approach based on magnetic particle spectrometry (MPS) to monitor the uptake and distribution of different sized (10 and 20 nm) chelated IONPs in plants. We exposed garden cress (Lepidium sativum) plants to EDTA-capped IONPs and observed an 8-fold enhancement in total biomass and 1.4 times increase in chlorophyll production compared to plants treated with a commercial chelated iron fertilizer (Fe-EDTA). Moreover, we demonstrated that the uptake and tissue distribution of IONPs can be quantitatively monitored using MPS, and the results of the analysis were validated by atomic absorption spectroscopy, which is the conventional method used to study IONP plant uptake. Our study demonstrates that MPS is a reliable, sensitive, and effective analytical tool for the development of IONP-based fertilizers.

Graphical abstract: Exploring the chelation-based plant strategy for iron oxide nanoparticle uptake in garden cress (Lepidium sativum) using magnetic particle spectrometry

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Jun 2019, accepted on 10 Sep 2019 and first published on 17 Sep 2019


Article type: Paper
DOI: 10.1039/C9NR05477D
Nanoscale, 2019, Advance Article

  •   Request permissions

    Exploring the chelation-based plant strategy for iron oxide nanoparticle uptake in garden cress (Lepidium sativum) using magnetic particle spectrometry

    M. Ju, M. Navarreto-Lugo, S. Wickramasinghe, N. B. Milbrandt, A. McWhorter and A. C. S. Samia, Nanoscale, 2019, Advance Article , DOI: 10.1039/C9NR05477D

Search articles by author

Spotlight

Advertisements