Differential Toxicity of Bare and Hybrid ZnO Nanoparticles in Green Pea (Pisum sativum L.): A Life Cycle Study

Frontiers in Plant Science
Arnab MukherjeeJ L Gardea-Torresdey

Abstract

The effect of surface or lattice modification of nanoparticles (NPs) on terrestrial plants is poorly understood. We investigated the impact of different zinc oxide (ZnO) NPs on green pea (Pisum sativum L.), one of the highest consumed legumes globally. Pea plants were grown for 65 d in soil amended with commercially available bare ZnO NPs (10 nm), 2 wt% alumina doped (Al2O3@ZnO NPs, 15 nm), or 1 wt% aminopropyltriethoxysilane coated NPs (KH550@ZnO NP, 20 nm) at 250 and 1000 mg NP/kg soil inside a greenhouse. Bulk (ZnO) and ionic Zn (zinc chloride) were included as controls. Plant fresh and dry biomass, changes in leaf pigment concentrations, elements (Zn, Al, Si), and protein and carbohydrate profile of green pees were quantified upon harvest at 65 days. With the exception of the coated 1000 mg/kg NP treatment, fresh and dry weight were unaffected by Zn exposure. Although, all treated plants showed higher tissue Zn than controls, those exposed to Al2O3@ZnO NPs at 1000 mg/kg had greater Zn concentration in roots and seeds, compared to bulk Zn and the other NP treatments, keeping Al and Si uptake largely unaffected. Higher Zn accumulation in green pea seeds were resulted in coated ZnO at 250 mg/kg treatments. In leaves, Al2O3@ZnO...Continue Reading

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Citations

May 26, 2017·Journal of Agricultural and Food Chemistry·Christian O Dimkpa, Prem S Bindraban
Jun 24, 2019·Environmental Science and Pollution Research International·Alameh BabajaniBahman Eslami
Nov 12, 2020·Plants·Carmelina SpanòMonica Ruffini Castiglione
Sep 7, 2018·Plant Physiology and Biochemistry : PPB·Venkata L Reddy PullaguralaJorge L Gardea-Torresdey
May 18, 2021·Environmental Science & Technology·Zeinah Elhaj Baddar, Jason M Unrine
Sep 1, 2021·Plant Physiology and Biochemistry : PPB·Hisham A ElshokyEmilia Apostolova

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