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Type: Journal article
Title: Gold nanomaterial uptake from soil is not increased by arbuscular mycorrhizal colonization of solanum lycopersicum (Tomato)
Author: Judy, J.
Kirby, J.
McLaughlin, M.
Cavagnaro, T.
Bertsch, P.
Citation: Nanomaterials, 2016; 6(4):68-1-68-9
Publisher: MDPI AG
Issue Date: 2016
ISSN: 2079-4991
Statement of
Jonathan D. Judy, Jason K. Kirby, Mike J. McLaughlin, Timothy Cavagnaro and Paul M. Bertsch
Abstract: Bioaccumulation of engineered nanomaterials (ENMs) by plants has been demonstrated in numerous studies over the past 5-10 years. However, the overwhelming majority of these studies were conducted using hydroponic systems and the degree to which the addition of the biological and chemical components present in the soil might fundamentally alter the potential of plant bioaccumulation of ENMs is unclear. Here, we used two genotypes of Solanum lycopersicum (tomato), reduced mycorrhizal colonization (rmc), a mutant which does not allow arbuscular mycorrhizal fungi (AMF) colonization, and its progenitor, 76R, to examine how colonization by AMF alters trends of gold ENM bioaccumulation from a natural soil. Gold was taken up and bioaccumulated by plants of both genotypes. Gold concentrations were significantly higher in the rmc treatment although this was likely attributable to the large differences in biomass between the 76R and rmc plants. Regardless, there was little evidence that AMF played a significant role in trafficking Au ENMs into the plants. Furthermore, despite very low NH₄NO₃ extractable Au concentrations, Au accumulated at the root-soil interface. Although this observation would seem to suggest that ENMs may have potential to influence this particularly biologically active and important soil compartment, we observed no evidence of this here, as the 76R plants developed a robust AMF symbiosis despite accumulation of Au ENMs at the rhizoplane.
Keywords: Nanotoxicology; nanotechnology; ecotoxicology; risk assessment
Rights: © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (
RMID: 0030046964
DOI: 10.3390/nano6040068
Appears in Collections:Agriculture, Food and Wine publications

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