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首页> 外文期刊>Ecotoxicology and Environmental Safety >Effect of 24-epibrassinolide on reactive oxygen species and antioxidative defense systems in tall fescue plants under lead stress
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Effect of 24-epibrassinolide on reactive oxygen species and antioxidative defense systems in tall fescue plants under lead stress

机译：24倍刺激素对铅胁迫下高浊厂活性氧物种和抗氧化防御系统的影响

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摘要

Lead is one of the most hazardous pollutants to both the environment as well as human beings. As one of the approaches to enhance phytoremediation, brassinosteroids are predicted as a potential candidate phytohormone for assisted phytoremediation. Few studies have focused on the physiological regulations of tall fescue plants (Festuca arundinacea Schreb.), a potential phytoremediation species, for its responses to applications of brassinosteroids under lead stress. Therefore, the objectives of this study were to investigate the effects of foliar application of 24-epibrassinolide, a brassinosteroids analogue, on reactive oxygen species accumulation and antioxidative defense systems of tall fescue when exposed to lead, and ultimately its potential to be used in phytoremediation. When exposed to lead (1000 mg/kg) for 80 d, decreases in shoot and root biomass of tall fescue biomass as well as chlorophyll and carotenoid productions were found. Foliar application of 24-epibrassinolide at three rates and five applications every 7 d improved the biomass of both shoots and roots, and increased the photosynthetic pigments. The improved lead tolerance in tall fescue plants after 24-epibrassinolide applications was associated with reduced H2O2 and O-2(center dot-) accumulations and increased antioxidative enzyme activities including superoxide dismutase, catalase, and guaiacol peroxidase. Additionally, osmoprotectants increased and lipid peroxidation decreased. Ultimately, foliar applications of 24-epibrassinolide enhanced the lead recovery rate of tall fescue plants, proving its potential role in phytoremediation for soil contaminated with heavy metals such as lead.
机译：铅是环境中最有害的污染物之一以及人类。作为增强植物修复的方法之一，铜雌激素被预测为潜在的候选植物植物，用于辅助植物化。少数研究侧重于高浮虫植物的生理法规（Festuca Arundinacea Schreb。），一种潜在的植物修复物种，其对乳腺胁迫下的芸苔类固醇应用的反应。因此，本研究的目的是探讨叶面施用24倍刺激素，芸苔类固醇类化合物的影响，芸苔类化合物在暴露于铅时高高的FESCUE的反应性氧物种积累和抗氧化防御系统，并最终将其用于植物化的潜力。当暴露于80d的铅（1000mg / kg）时，发现了高杂草生物量以及叶绿素和类胡萝卜素生产的枝条和根生物质的降低。叶面在三个速率下施用24倍蛋白醇，每7 d改善枝条和根部的生物量，并增加光合色素。在24倍蛋白醇化应用后的高型植物中的改善铅耐受性与降低的H 2 O 2和O-2（中心点）累积和增加的抗氧化酶活性，包括超氧化物歧化酶，过氧化氢酶和愈菌过氧化物酶。另外，渗透压剂增加和脂质过氧化降低。最终，叶面含有24倍刺激素的含量增强了高型植物的铅回收率，证明了其在植物中吞噬的植物中的潜在作用，其污染重金属如铅。

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  • 来源
    《Ecotoxicology and Environmental Safety》 |2020年第1期|109831.1-109831.10|共10页
  • 作者

    Zhong Woxiu; Xie Chengcheng; Hu Dan; Pu Siyi; Xiong Xi; Ma Jun; Sun Lingxia; Huang Zhuo; Jiang Mingyan; Li Xi;

  • 作者单位

    Sichuan Agr Univ Coll Landscape Architecture 211 Huimin Rd Wenjiang 611130 Sichuan Peoples R China;

    Sichuan Agr Univ Coll Landscape Architecture 211 Huimin Rd Wenjiang 611130 Sichuan Peoples R China;

    Chengdu Univ Technol Coll Tourism & Urban Rural Planning 1 Dongsan Rd Chenghua 610051 Sichuan Peoples R China;

    Sichuan Agr Univ Coll Landscape Architecture 211 Huimin Rd Wenjiang 611130 Sichuan Peoples R China;

    Univ Missouri Div Plant Sci Columbia MO 65211 USA;

    Sichuan Agr Univ Coll Landscape Architecture 211 Huimin Rd Wenjiang 611130 Sichuan Peoples R China;

    Sichuan Agr Univ Coll Landscape Architecture 211 Huimin Rd Wenjiang 611130 Sichuan Peoples R China;

    Sichuan Agr Univ Coll Landscape Architecture 211 Huimin Rd Wenjiang 611130 Sichuan Peoples R China;

    Sichuan Agr Univ Coll Landscape Architecture 211 Huimin Rd Wenjiang 611130 Sichuan Peoples R China;

    Sichuan Agr Univ Coll Landscape Architecture 211 Huimin Rd Wenjiang 611130 Sichuan Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);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

    24-Epibrassinolide; Antioxidant system; Lead stress; ROS level; Tall fescue;

    机译：24-呕血;抗氧化系统;铅应力;ROS水平;高浮灰;

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