Cerium oxide nanoparticles (CeO₂ NPs) are widely used in industries and have caused environmental problems. However, the phytotoxicity induced by CeO₂ NPs lacks detailed information on phytotoxicity. In this research, the effect of CeO₂ NPs on soybean plants (Glycine max) was studied. Scanning electron microscopy with the energy dispersion spectroscopy was used to characterize the NPs form in soybean. The growth of the root was increased, whereas the growth of shoot was inhibited. Besides, Chlorophyll Fluorescence Imager (CF Imager) showed that chlorophyll synthesis was inhibited: the maximum quantum yield of Photosystem II complex (PSII) (Fv/Fm) and photochemical quenching (qP) decreased. Moreover, transmission electron microscopy revealed that the chloroplast thylakoid structure was changed, and thus reduced the energy conversion in the Calvin cycle from C5 to C3. Our work suggests that CeO₂ NPs will cause growth changes as well as irreversible damage to soybean plants. Our findings will provide evidence for estimation of plant toxicity induced by CeO₂ NPs.

中文翻译：

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氧化铈纳米粒子对大豆 (Glycine max) 的生长和光合作用抑制。


氧化铈纳米颗粒(CeO ₂ NPs)广泛应用于工业中并引起了环境问题。然而，CeO ₂ NPs引起的植物毒性缺乏详细的植物毒性信息。在本研究中，研究了CeO ₂ NPs对大豆植物( Glycine max )的影响。使用扫描电子显微镜和能量色散光谱来表征大豆中纳米粒子的形式。根的生长增加，而地上部的生长受到抑制。此外，叶绿素荧光成像仪（CF Imager）显示叶绿素合成受到抑制：光系统II复合体（PSII）（Fv/Fm）和光化学猝灭（qP）的最大量子产率降低。此外，透射电子显微镜显示叶绿体类囊体结构发生改变，从而减少了卡尔文循环中从C5到C3的能量转换。我们的工作表明，CeO ₂ NPs 会导致大豆植物生长变化以及不可逆转的损害。我们的研究结果将为估计 CeO ₂ NPs 引起的植物毒性提供证据。