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Phytotoxicity of nanoparticles: Inhibition of seed germination and root growth

Lin, Daohui and Xing, Baoshan (2007) Phytotoxicity of nanoparticles: Inhibition of seed germination and root growth. ENVIRONMENTAL POLLUTION, 150 (2). pp. 243-250.

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Abstract

Plants need to be included to develop a comprehensive toxicity profile for nanoparticles. Effects of five types of nanoparticles (multi-walled carbon nanotube, aluminum, alumina, zinc, and zinc oxide) on seed germination and root growth of six higher plant species (radish, rape, ryegrass, lettuce, corn, and cucumber) were investigated. Seed germination was not affected except for the inhibition of nanoscale zinc (nano-Zn) on ryegrass and zinc oxide (nano-ZnO) on corn at 2000 mg/L. Inhibition on root growth varied greatly among nanoparticles and plants. Suspensions of 2000 mg/L nano-Zn or nano-ZnO practically terminated root elongation of the tested plant species. Fifty percent inhibitory concentrations (IC50) of nano-Zn and nano-ZnO were estimated to be near 50 mg/L for radish, and about 20 mg/L for rape and ryegrass. The inhibition occurred during the seed incubation process rather than seed soaking stage. These results are significant in terms of use and disposal of engineered nanoparticles. (C) 2007 Elsevier Ltd. All rights reserved.

Item Type:Article
Uncontrolled Keywords:phytotoxicity; nanoparticle; seed germination; root growth; plants
Subjects:Biomedical Science > Nanoscale biological processes
Technology > Nanotechnology and agricultural applications
NanoSafety > Environment, health and safety aspects of nanotechnology
ID Code:238
Deposited By:Lesley Tobin
Deposited On:18 Dec 2008 12:29
Last Modified:18 Dec 2008 12:29

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