Contrasting silver nanoparticle toxicity and detoxification strategies in Microcystis aeruginosa and Chlorella vulgaris: New insights from proteomic and physiological analyses

文献类型： 外文期刊

第一作者： Qian, Haifeng

作者： Qian, Haifeng;Chen, Jun;Zhu, Kun;Fu, Zhengwei;Lu, Haiping;Lavoie, Michel;Chen, Si;Zhou, Zhongjing;Deng, Zhiping

作者机构：

关键词： Chlorella vulgaris;Microcystis aeruginosa;Silver nanoparticles;DIGE;Silver toxicity;Antioxidant

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2016 年 572 卷

页码：

收录情况： SCI

摘要： Several studies have shown that AgNPs can be toxic to phytoplankton, but the underlying cellular mechanisms still remain largely unknown. Here we studied the toxicity and detoxification of AgNPs (and ionic silver released by the AgNPs) in a prokaryotic (Microcystis aeruginosa) and a eukaryotic (Chlorella vulgaris) freshwater phytoplankton species using a combination of proteomic, gene transcription, and physiological analyses. We show that AgNPs were more toxic to the growth, photosynthesis, antioxidant systems, and carbohydrate metabolism of M. aeruginosa than of C. vulgaris. C. vulgaris could detoxify efficiently AgNPs-induced ROS species via induction of antioxidant enzymes (superoxide dismutase or SOD, peroxidase or POD, catalase or CAT, and glutamine synthetase), allowing photosynthesis to continue unabated at growth-inhibitory AgNPs concentration. By contrast, the transcription and expression of SOD and POD in M. aeruginosa was inhibited by the same AgNPs exposure. The present study shed new lights on the AgNPs toxicity mechanisms and detoxification strategies in two freshwater algae of contrasting AgNPs sensitivity. (C) 2016 Elsevier B. V. All rights reserved.

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