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首页> 外文期刊>Environmental Science & Technology >Identifying the Phytotoxicity and Defense Mechanisms Associated with Graphene-Based Nanomaterials by Integrating Multiomics and Regular Analysis
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Identifying the Phytotoxicity and Defense Mechanisms Associated with Graphene-Based Nanomaterials by Integrating Multiomics and Regular Analysis

机译：通过整合多组合和定期分析，鉴定与基于石墨烯的纳米材料相关的植物毒性和防御机制

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摘要

The application of graphene-based nanomaterials (GBNs) has attracted global attention in various fields, and understanding defense mechanisms against the phytotoxicity of GBNs is crucial for assessing their environmental risks and safe-by- design. However, the related information is lacking, especially for edible vegetable crops. In the present study, GBNs (0.25, 2.5, and 25 mg/kg plant fresh weight) were injected into the stems of pepper plants. The results showed that the plant defense was regulated by reducing the calcium content by 21.7-48.3%, intercellular CO_2 concentration by 12.0-35.2%, transpiration rate by 8.7-40.2%, and stomatal conductance by 16.9-50.5%. The defense pathways of plants in response to stress were further verified by the downregulation of endocytosis and transmembrane transport proteins, leading to a decrease in the nanomaterial uptake. The phytohormone gibberellin and abscisic acid receptor PYL8 were upregulated, indicating the activation of defense systems. However, reduced graphene oxide and graphene oxide quantum dots trigger stronger oxidative stress (e.g., H_2O_2 and malondialdehyde) than graphene oxide in fruits due to the breakdown of antioxidant defense systems (e.g., cytochrome P450 86A22 and P450 77A1). Both nontargeted proteomics and metabolomics consistently demonstrated that the downregulation of carbohydrate and upregulation of amino acid metabolism were the main mechanisms underlying the phytotoxicity and defense mechanisms, respectively.
机译：基于石墨烯的纳米材料（GBNS）的应用引起了各种领域的全球关注，了解GBNS植物毒性的防御机制对于评估其环境风险和安全设计至关重要。然而，缺乏相关信息，特别是食用蔬菜作物。在本研究中，将GBNS（0.25,2.5和25mg / kg植物新鲜重量）注入辣椒植物的茎中。结果表明，植物防御通过将钙含量降低21.7-48.3％，细胞间CO_2浓度将12.0-35.2％，蒸腾率降低了8.7-40.2％，气孔电导率为16.9-50.5％。通过对内吞作用和跨膜输送蛋白的下调进一步验证了植物的防防肺途径，导致纳米材料摄取的降低。上调植物激素胃植物和脱落酸受体幽门，表明防御系统的活化。然而，由于抗氧化剂防御系统（例如细胞色素P450 86A22和P450 77A1）的击穿，还比石墨烯氧化物和石墨烯氧化物量子点引发更强的氧化应激（例如，H_2O_2和丙炔），而不是水果中的石墨烯氧化物。非靶素和代谢组学始终如一地证明碳水化合物的下调和氨基酸代谢的上调是植物毒性和防御机制的主要机制。

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  • 来源
    《Environmental Science & Technology》 |2021年第14期|9938-9948|共11页
  • 作者

    Xiaokang Li; Shan Sun; Shuqing Guo; Xiangang Hu;

  • 作者单位

    School of Environmental and Material Engineering Yantai University Yantai 264005 China;

    Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University Tianjin 300350 China;

    Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University Tianjin 300350 China;

    Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University Tianjin 300350 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

    graphene; photosynthesis; nanotoxicity; defense; proteomics; metabolomics;

    机译：石墨烯;光合作用;纳米毒性;防御;蛋白质组学;代谢组学;

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