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首页> 外文期刊>Journal of Botany >Evaluation of Copper Oxide Nanoparticles Toxicity Using ChlorophyllaFluorescence Imaging inLemna gibba
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Evaluation of Copper Oxide Nanoparticles Toxicity Using ChlorophyllaFluorescence Imaging inLemna gibba

机译：叶绿素荧光成像法评价吉百豆中氧化铜纳米颗粒的毒性

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摘要

Copper oxide nanoparticles (CuO NPs), used in antifouling paints of boats, are released in the environment and can induce toxicity to aquatic organisms. In this report, we used chlorophyllafluorescence imaging to evaluate CuO NPs toxicity inLemna gibba. This approach allowed to evaluate the differential effect of CuO NPs on photosynthesis of wholeL. gibbaplants. Exposure to 0.1 to 0.4 g/L CuO NPs during 48h induced strong inhibition of photosynthetic processes resulting in a decrease of plant growth. By using fluorescence imaging, different photosynthetic parameters were evaluated simultaneously in microplate conditions. Imaging ofFOfluorescence yield showed the decrease of leaf photosynthetic active surface for whole plants exposed to CuO NPs. This method showed that CuO NPs inhibited photosystem II maximal, photosystem II operational quantum yields, and photochemical quenching of fluorescence associated with electron transport. Nonphotochemical fluorescence quenching as an indicator of energy dissipation not used in photosynthesis was shown to be increased by the effect of CuO NPs. Such approach in microplate conditions provides synchronous high repetition measurements for numerous plants. This study may give a reliable methodological approach to evaluate toxicity risk of NPs in aquatic ecosystems.
机译：用于船上防污涂料的氧化铜纳米颗粒（CuO NPs）释放到环境中，并且可以诱导对水生生物的毒性。在本报告中，我们使用了叶绿素荧光成像评估CuO NPs在长臂猿中的毒性。这种方法可以评估CuO NPs对整株光合作用的差异作用。长臂猿。在48小时内暴露于0.1至0.4μg/ L的CuO NPs会强烈抑制光合作用，导致植物生长下降。通过使用荧光成像，在微孔板条件下同时评估了不同的光合作用参数。 FO荧光产量成像显示，暴露于CuO NP的整株植物叶片光合活性表面减少。该方法表明，CuO NPs抑制了光系统II的最大值，光系统II的操作量子产率以及与电子传输有关的荧光的光化学猝灭。 CuO NPs的作用增加了非光化学荧光淬灭作为光合作用中不消耗能量的指标。在微孔板条件下的这种方法为众多植物提供了同步的高重复测量。这项研究可能提供一种可靠的方法学方法来评估水生生态系统中NP的毒性风险。

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