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首页> 外文期刊>Environmental toxicology and chemistry >Physiological Responses of Chlorella sorokiniana to Copper Nanoparticles
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Physiological Responses of Chlorella sorokiniana to Copper Nanoparticles

机译：小黄氏菌铜纳米粒子的生理反应

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Copper (Cu) nanomaterials have been increasingly researched and produced for many different consumer products. They have high reactivity and bactericidal properties, making them important in antifouling paints, which are thus directly introduced into aquatic ecosystems. However, studies are scarce on the behavior of Cu nanoparticles (Cu-NPs) in natural aquatic systems and their interactions with primary producers such as microalgae. We investigated the effects of NPs on some physiological responses of the freshwater phytoplankton Chlorella sorokiniana. The cells were exposed to nominal concentrations ranging from 2.50 to 635.00 mu g L-1 Cu-NPs for 96 h under laboratory-controlled conditions. The cultures were monitored daily for population growth and maximum photosynthetic quantum yield. Total lipids, proteins, and carbohydrates were quantified at 72 h of Cu-NP exposure. The results showed a positive correlation between nominal Cu-NPs and Cu in the biomass (0.97 correlation coefficient) and that this was inversely proportional to total carbohydrates, with a -0.64 correlation coefficient. At the higher end of the Cu-NP concentrations tested, higher total proteins and reduced growth rates were obtained in comparison with controls; we suggest that metal-binding proteins/antioxidants and nonstructural proteins were preferentially produced under these conditions. Our results contribute to an understanding of the interaction between Cu-NPs and a cosmopolitan phytoplankton, C. sorokiniana, and we emphasize that the disposal and use of Cu-NPs requires monitoring because even at environmentally relevant concentrations, the composition of the algae was affected. Environ Toxicol Chem 2019;38:387-395. (c) 2018 SETAC
机译：铜（Cu）纳米材料越来越多地研究和生产了许多不同的消费产品。它们具有高反应性和杀菌性能，使它们在防污涂料中重要，因此直接引入水生生态系统。然而，研究对天然水生系统中Cu纳米颗粒（Cu-NPS）的行为及其与微藻等初级生产者的相互作用的研究稀缺。我们调查了NPS对淡水浮游植物小黄氏菌的一些生理反应的影响。将细胞暴露于在实验室控制条件下为96小时的2.50至635.00μg-11的标称浓度。每天监测培养物用于人口生长和最大光合量子产量。在Cu-NP暴露的72小时下量化总脂质，蛋白质和碳水化合物。结果表明，生物质（0.97个相关系数）中标称Cu-NPS和Cu之间的正相关性，并且这与总碳水化合物成反比，具有-0.64个相关系数。在测试的Cu-NP浓度的较高端，与对照相比，获得了更高的总蛋白质和降低的生长速率;我们表明，优先在这些条件下生产金属结合蛋白/抗氧化剂和非结构蛋白。我们的结果有助于了解Cu-NPS与浮游生物，C.Sorokiniana之间的相互作用，并强调Cu-NPS的处理和使用需要监测，因为即使在环境相关浓度，藻类的组成也受到影响。环境毒素科学2019; 38：387-395。 （c）2018 Setac

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