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首页> 外文期刊>Environmental Pollution >Transcriptome analysis of the toxic mechanism of nanoplastics on growth, photosynthesis and oxidative stress of microalga Chlorella pyrenoidosa during chronic exposure
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Transcriptome analysis of the toxic mechanism of nanoplastics on growth, photosynthesis and oxidative stress of microalga Chlorella pyrenoidosa during chronic exposure

机译：慢性暴露过程中纳米粒子瘤群体毒性机理的转录体分析

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摘要

The toxicity of nanoplastics to aquatic organisms has been widely studied in terms of biochemical indicators. However, there is little discussion about the underlying toxic mechanism of nanoplastics on microalgae. Therefore, the chronic effect of polystyrene (PS) nanoplastics (80 nm) on Chlorella pyrenoidosa was investigated, in terms of responses at the biochemical and molecular/omic level. It was surprising that both inhibitory and promoting effects of nanoplastcis on C. pyrenoidosa were found during chronic exposure. Before 13 days, the maximum growth inhibition rate was 7.55% during 10 mg/L PS nanoplastics treatment at 9 d. However, the inhibitory effect gradually weakened with the prolongation of exposure time. Interestingly, algal growth was promoted for 1 & ndash;5 mg/L nanoplastics during 15 & ndash;21 d exposure. Transcriptomic analysis explained that the inhibitory effect of nanoplastics could be attributed to suppressed gene expression of aminoacyl-tRNA synthetase that resulted in the reduced synthesis of related enzymes. The promotion phenomenon may be due to that C. pyrenoidosa defended against nanoplastics stress by promoting cell proliferation, regulating intracellular osmotic pressure, and accelerating the degradation of damaged proteins and organs. This study is conducive to provide theoretical basis for evaluating the actual hazard of nanoplastics to aquatic organisms.
机译：在生物化学指标方面广泛研究了纳米塑料对水生生物的毒性。然而，关于微藻纳型纳米型纳米术的潜在毒性机制几乎没有讨论。因此，在生物化学和分子/室内水平的反应方面，研究了聚苯乙烯（PS）纳米玻璃体（80nm）对小球藻芘的慢性效应。令人惊讶的是，在慢性暴露期间发现了纳米缩醛上的纳米蛋白酶蛋白酶对C. pyrenoidosa的抑制和促进作用。在13天之前，在9天的10mg / L PS纳米纳薄处理期间，最大生长抑制率为7.55％。然而，抑制作用随着暴露时间的延长而逐渐削弱。有趣的是，藻类生长促进1＆ndash; 5 mg / L纳米塑料在15和ndash期间; 21 d暴露。转录组分析解释说，纳米本体的抑制作用归因于抑制氨基酰基-TRNA合成酶的基因表达，其导致相关酶的合成减少。通过促进细胞增殖，调节细胞内渗透压，加速受损蛋白质和器官的降解，促进现象可能是由于C. pyrenoidose针对纳米塑料应力造成针对纳米塑料应激的抗性纳米塑料应力。本研究有利于提供评估实际纳米塑料对水生生物的理论依据。

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  • 来源
    《Environmental Pollution》 |2021年第9期|117413.1-117413.13|共13页
  • 作者

    Yang Wenfenguio; Gao Pan; Ma Guoyi; Huang Jiayi; Wu Yixiao; Wan Liang; Ding Huijun; Zhang Weihao;

  • 作者单位

    Wuhan Univ Sch Resource & Environm Sci Hubei Biomass Resource Chem & Environm Biotechnol Wuhan 430079 Hubei Peoples R China;

    Huazhong Univ Sci & Technol Coll Life Sci & Technol Key Lab Mol Biophys Minist Educ Wuhan 430074 Hubei Peoples R China;

    Wuhan Univ Sch Resource & Environm Sci Hubei Biomass Resource Chem & Environm Biotechnol Wuhan 430079 Hubei Peoples R China;

    Wuhan Univ Sch Resource & Environm Sci Hubei Biomass Resource Chem & Environm Biotechnol Wuhan 430079 Hubei Peoples R China;

    Wuhan Univ Sch Resource & Environm Sci Hubei Biomass Resource Chem & Environm Biotechnol Wuhan 430079 Hubei Peoples R China;

    Wuhan Univ Sch Resource & Environm Sci Hubei Biomass Resource Chem & Environm Biotechnol Wuhan 430079 Hubei Peoples R China;

    Jiangxi Inst Water Sci Jiangxi Prov Key Lab Water Resources & Environm P Nanchang 330029 Jiangxi Peoples R China;

    Wuhan Univ Sch Resource & Environm Sci Hubei Biomass Resource Chem & Environm Biotechnol Wuhan 430079 Hubei Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Chronic exposure; Inhibition effect; Microalgae; Nanoplastics; Promotion effect;

    机译：慢性暴露;抑制作用;微藻;纳米塑料;促进效果;

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