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Forests 2017, 8(9), 310; https://doi.org/10.3390/f8090310

The Effect of Silver and Copper Nanoparticles on the Condition of English Oak (Quercus robur L.) Seedlings in a Container Nursery Experiment

1
Department of Forest Protection and Ecology, Faculty of Forestry, Warsaw University of Life Sciences, Nowoursynowska 159, Warsaw 02-776, Poland
2
Department of Forest Protection, Forest Research Institute, Braci Leśnej 3, Sękocin Stary 05-090, Poland
3
Department of Experimental Design and Bioinformatics, Faculty of Agriculture and Biology, Warsaw University of Life Sciences, Nowoursynowska 159, Warsaw 02-776, Poland
4
Department of Botany, Faculty of Agriculture and Biology, Warsaw University of Life Sciences, Nowoursynowska 159, Warsaw 02-776, Poland
5
Department of Botany and Biodiversity Research, Faculty of Life Sciences, University of Vienna, Rennweg 14, Wien A-1030, Austria
*
Author to whom correspondence should be addressed.
Received: 8 August 2017 / Revised: 21 August 2017 / Accepted: 23 August 2017 / Published: 25 August 2017
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Abstract

Some studies indicate that metal nanoparticles can be used in plant cultivation as fungicides and growth stimulators. The aim of this study was to evaluate the effect of silver (AgNPs) and copper nanoparticles (CuNPs) on the growth parameters, on the extent of leaves infected by powdery mildew and on spontaneous ectomycorrhizal colonization of English oak (Quercus robur L.) seedlings growing in containers. Nanoparticles were applied to foliage four times during one vegetation season, at four concentrations: 0, 5, 25 and 50 ppm. The adsorption of NPs to leaves was observed by microscopical imaging (TEM). The tested concentrations of AgNPs and CuNPs did not have any significant effect on the growth parameters of the oak seedlings. TEM results showed disturbances in the shape of plastids, plastoglobules and the starch content of oak leaves treated with 50 ppm Cu- and AgNPs, while no changes in the ultrastructure of stems and roots of oak plants treated with NPs were observed. No significant difference in powdery mildew disease intensity was observed after NP foliar app lication. Four ectomycorrhizal taxa were detected on oak roots (Sphaerosporella brunnea, Thelephora terrestris, Paxillus involutus and Laccaria proxima). Oak seedlings treated (foliar) with CuNPs and AgNPs at 25 ppm were characterised by the highest degree of mycorrhization (respectively, 37.1% and 37.5%) among all treatments including the control treatment. None of the tested NPs manifested phytotoxicity in the examined Q. robur seedlings under container nursery conditions. View Full-Text
Keywords: nanoparticles; Quercus robur; mycorrhiza; toxicity; powdery mildew nanoparticles; Quercus robur; mycorrhiza; toxicity; powdery mildew
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Olchowik, J.; Bzdyk, R.M.; Studnicki, M.; Bederska-Błaszczyk, M.; Urban, A.; Aleksandrowicz-Trzcińska, M. The Effect of Silver and Copper Nanoparticles on the Condition of English Oak (Quercus robur L.) Seedlings in a Container Nursery Experiment. Forests 2017, 8, 310.

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