X-ray absorption spectroscopy (XAS) corroboration of the uptake and storage of CeO(2) nanoparticles and assessment of their differential toxicity in four edible plant species.
X-ray absorption spectroscopy (XAS) corroboration of the uptake and storage of CeO(2) nanoparticles and assessment of their differential toxicity in four edible plant species.
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DOI：
10.1021/jf904472e
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发表时间：
2010-03-24
影响因子：
6.1
通讯作者：
Gardea-Torresdey JL
中科院分区：
文献类型：
--
作者：
López-Moreno ML;de la Rosa G;Hernández-Viezcas JA;Peralta-Videa JR;Gardea-Torresdey JL
氧化铈纳米颗粒（nanoceria，CeO 2）的命运，运输和可能的毒性仍然未知。在这项研究中，苜蓿（Medicago sativa）、玉米（Zea mays）、黄瓜（Cucumis sativus）和番茄（Lycopersicon esculentum）的种子用0-4000 mg L-1的纳米氧化铈处理。分别使用ICP-OES和XAS测定组织内的铈摄取和氧化态。发芽率和根伸长也进行了测定。结果表明，纳米二氧化铈显著降低了玉米的发芽率（2000 mg L−1时约为30%，p < 0.05），2000 mg L−1时番茄和黄瓜的发芽率分别降低了30%和20%（p < 0.05）。纳米氧化铈显著促进黄瓜和玉米根系生长（p < 0.05），抑制苜蓿和番茄根系生长（p < 0.05）。几乎在所有浓度nanoceria促进芽伸长的四种植物。XAS数据清楚地显示了四种植物组织中的纳米铈。据作者所知，这是首次报道植物中存在纳米氧化铈。
Fate, transport, and possible toxicity of cerium oxide nanoparticles (nanoceria, CeO2) are still unknown. In this study, seeds of alfalfa (Medicago sativa), corn (Zea mays), cucumber (Cucumis sativus), and tomato (Lycopersicon esculentum) were treated with nanoceria at 0–4000 mg L−1. Cerium uptake and oxidation state within tissues were determined using ICP-OES and XAS, respectively. Germination rate and root elongation were also determined. Results showed that nanoceria significantly reduced corn germination (about 30% at 2000 mg L−1, p < 0.05), and at 2000 mg L−1 germination of tomato and cucumber was reduced by 30% and 20%, respectively (p < 0.05). Root growth was significantly promoted (p < 0.05) by nanoceria in cucumber and corn but reduced (p < 0.05) in alfalfa and tomato. Almost at all concentrations nanoceria promoted shoot elongation in the four plant species. XAS data clearly showed the nanoceria within tissues of the four plant species. To the authors’ knowledge, this is the first report on the presence nanoceria within plants.
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影响因子：
6.2
作者：
Nakamaru, Y;Tagami, K;Uchida, S
通讯作者：
Uchida, S
影响因子：
8.6
作者：
Shahin, AM;Grandjean, F;Schuman, TP
通讯作者：
Schuman, TP
影响因子：
4.9
作者：
Xu, XK;Zhu, WZ;Witkamp, GJ
通讯作者：
Witkamp, GJ
影响因子：
14
作者：
Heckert, Eric G.;Karakoti, Ajay S.;Self, William T.
通讯作者：
Self, William T.
影响因子：
4.2
作者：
Guo, Xiaoshan;Zhou, Qing;Huang, Xiaohua
通讯作者：
Huang, Xiaohua