Journal
ENVIRONMENTAL TECHNOLOGY
Volume 40, Issue 18, Pages 2446-2454Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2018.1445299
Keywords
nano-ZnO; hydrogen peroxide; orthophosphate; toxicity; Lemna minor
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Funding
- CSC (China Scholarship Council)
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Because of their applications in large numbers of products, Zinc Oxide nanoparticles (nano-ZnO) will inevitably enter into the environment. Nano-ZnO released into the environment will be present in a complex matrix which can cause various chemical and physical transformations and modulate the biological reactivity of these particles. Due to their rapid growth and small size, Lemna minor is recommended by OECD for toxicological testing. Here, we tested how nano-ZnO reactivity is modulated by the suite of macro- and micronutrients that are present in Lemna minor growth media. Specifically, we measured ex situ Reactive Oxygen Species (ROS) formation by nano-ZnO, and subsequent in planta toxicity. The data show how orthophosphate can modulate both ex situ ROS formation, and in planta toxicity. This has ramifications for phytotoxicity testing, which is commonly performed under controlled conditions and on media containing orthophosphate.
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