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Phytotoxicity of multi-walled carbon nanotubes on red spinach (Amaranthus tricolor L) and the role of ascorbic acid as an antioxidant

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Title: Phytotoxicity of multi-walled carbon nanotubes on red spinach (Amaranthus tricolor L) and the role of ascorbic acid as an antioxidant
Authors: Begum, Parvin Browse this author
Fugetsu, Bunshi Browse this author →KAKEN DB
Keywords: Multi-walled carbon nanotubes
Red spinach (Amaranthus tricolor L)
Reactive oxygen species
Phytotoxicity
Ascorbic acid
Issue Date: Dec-2012
Publisher: Elsevier B.V.
Journal Title: Journal of Hazardous Materials
Volume: 243
Start Page: 212
End Page: 222
Publisher DOI: 10.1016/j.jhazmat.2012.10.025
PMID: 23146354
Abstract: Carbon nanotubes (CNTs) are a novel nanomaterial with wide potential applications; however the adverse effects of CNTs following environmental exposure have recently received significant attention. Herein, we explore the systemic toxicity and potential influence of 0-1000 mg L^[-1] the multi-walled CNTs on red spinach. CNTs exposed plants exhibited growth inhibition and cell death after 15 days of hydroponic culture. CNTs had adverse effects on root and leaf morphology, as observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Raman spectroscopy detected CNTs in leaves. Biomarkers of nanoparticle toxicity, reactive oxygen species (ROS), and cell damage in the red spinach were greatly increased 15 days post-exposure to CNTs. These effects were reversed when CNTs were supplemented with ascorbic acid (AsA), suggesting a role of ROS in the CNT-induced toxicity and that the primary mechanism of the CNTs' toxicity is oxidative stress.
Type: article (author version)
URI: http://hdl.handle.net/2115/52048
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 古月 文志

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