Abstract
Nowadays, due to a wide range of applications of nanoparticles (NPs) in many industrial areas, accumulations of those entities in environment pose a great risk. Owing to their inertness, noble metal NPs may remain in contaminated soils nearly unchanged for long time. Within this context, size-, shape-, and concentration-dependent uptake of particles by plants belongs to unexplored area. In this work, we present water solutions of biologically friendly synthesized spherical AuNPs with pretty narrow size distribution in size range from 10 to 18 nm. Their thorough characterization by atomic absorption spectroscopy, mass spectroscopy-equipped inductively coupled plasma, dynamic light scattering (DLS), and TEM methods was followed by the study of their effect on the growth of Arabidopsis thaliana (primary and lateral roots), in particle size- and concentration-dependent manner. Due to strictly round-shape form of AuNPs and absence of particle agglomeration, DLS-derived size and size distribution were in good concordance with those obtained from TEM. The length and number of A. thaliana lateral roots were significantly affected by all types of AuNPs. Smallest AuNPs at highest concentration inhibited length of primary roots and, in contrast, enhanced hair root growth.
Highlights
Nowadays, modern chemistry and engineering churn out huge amounts of nanoobjects in order to improve utility properties of matter in special applications but increasingly in products of everyday consumption
We report on the effect of gold nanoparticles on plant growth, on the development of primary and lateral roots of A. thaliana in presence of different size particles
Analytical methods Prepared solutions of Gold nanoparticles (AuNPs) were characterized by Atomic Absorption Spectroscopy (AAS), mass spectroscopyequipped inductively coupled plasma (ICP-MS), dynamic light scattering (DLS), and transmission electron microscopy (TEM)
Summary
Modern chemistry and engineering churn out huge amounts of nanoobjects in order to improve utility properties of matter in special applications but increasingly in products of everyday consumption. * Correspondence: jakub.siegel@vscht.cz 1Department of Solid State Engineering, University of Chemistry and Technology, 166 28 Prague, Czech Republic Full list of author information is available at the end of the article in textile industry, or health care products and cosmetics (in particular that of high chemical inertness such as Au, Ag, Pt, and Pd) must be given special attention, since they may accumulate in the environment almost unchanged for many years, triggering so far unknown processes upon their plant uptake. We report on the effect of gold nanoparticles on plant growth, on the development of primary and lateral roots of A. thaliana in presence of different size particles.
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