Effects of the size and morphology of zinc oxide nanoparticles on the germination of Chinese cabbage seeds

Environmental Science and Pollution Research International
Lei XiangCe-Hui Mo

Abstract

The toxicity of four zinc oxide nanoparticles (i.e., spheric ZnO-30, spheric ZnO-50, columnar ZnO-90, and hexagon rod-like ZnO-150) to the seed germination of Chinese cabbage (Brassica pekinensis L.) was investigated in this study. The results showed that zinc oxide nanoparticles (nano-ZnOs) did not affect germination rates at concentrations of 1-80 mg/L but significantly inhibited the root and shoot elongation of Chinese cabbage seedlings, with the roots being more sensitive. The inhibition was evident mainly during seed incubation rather than the seed soaking process. Both the production of free hydroxyl groups (·OH) and the Zn bioaccumulation in roots or shoots resulted in toxicity of nano-ZnOs to Chinese cabbage seedlings. The toxicity of nano-ZnOs was affected significantly by their primary particle sizes in the minimum dimensionality, but large columnar ZnO-90 and small spherical ZnO-50 had comparable toxicities. Therefore, both the particle size and morphology affected the toxicity of nano-ZnOs.

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Citations

Jun 18, 2016·The Science of the Total Environment·P Venkata Laxma ReddyJ L Gardea-Torresdey
Nov 24, 2018·Environmental Science and Pollution Research International·Mahya SameiMohammad Ali Faramarzi
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Jun 9, 2021·Metallomics : Integrated Biometal Science·Yabo LiuZhiyong Zhang
Nov 14, 2018·Journal of Agricultural and Food Chemistry·Zeinah Elhaj Baddar, Jason M Unrine

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