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首页> 外文期刊>Environmental Pollution >Cerium oxide nanoparticles alter the salt stress tolerance of Brassica napus L. by modifying the formation of root apoplastic barriers
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Cerium oxide nanoparticles alter the salt stress tolerance of Brassica napus L. by modifying the formation of root apoplastic barriers

机译：氧化铈纳米粒子通过改变根部质外体屏障的形成来改变甘蓝型油菜的盐胁迫耐受性

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摘要

Rapidly growing global population adds significant strains on the fresh water resources. Consequently, saline water is increasingly tapped for crop irrigation. Meanwhile, rapid advancement of nanotechnology is introducing more and more engineered nanoparticles into the environment and in agricultural soils. While some negative effects of ENPs on plant health at very high concentrations have been reported, more beneficial effects of ENPs at relatively low concentrations are increasingly noticed, opening doors for potential applications of nanotechnology in agriculture. In particular, we found that cerium oxide nanoparticles (CeO(2)NPs) improved plant photosynthesis in salt stressed plants. Due to the close connections between salt stress tolerance and the root anatomical structures, we postulated that CeO(2)NPs could modify plant root anatomy and improve plant salt stress tolerance. This study aimed at testing the hypothesis with Brassica napus in the presence of CeO(2)NPs (0, 500 mg kg(-1) dry sand) and/or NaCl (0, 50 mM) in a growth chamber. Free hand sections of fresh roots were taken every seven days for three weeks and the suberin lamellae development was examined under a fluorescence microscope. The results confirmed the hypothesis that CeO(2)NPs modified the formation of the apoplastic barriers in Brassica roots. In salt stressed plants, CeO(2)NPs shortened the root apoplastic barriers which allowed more Na+ transport to shoots and less accumulation of Na+ in plant roots. The altered Na+ fluxes and transport led to better physiological performance of Brassica and may lead to new applications of nanotechnology in agriculture. (C) 2017 Elsevier Ltd. All rights reserved.
机译：快速增长的全球人口给淡水资源增加了极大的压力。因此，越来越多的盐水用于作物灌溉。同时，纳米技术的飞速发展正在将越来越多的工程纳米颗粒引入环境和农业土壤中。虽然已经报道了高浓度ENP对植物健康的一些负面影响，但人们越来越注意到低浓度ENP的更有益的影响，为纳米技术在农业中的潜在应用打开了大门。特别是，我们发现氧化铈纳米粒子（CeO（2）NPs）改善了盐胁迫植物的植物光合作用。由于盐胁迫耐受性和根部解剖结构之间的紧密联系，我们推测CeO（2）NPs可以修饰植物根部解剖结构并提高植物盐胁迫耐受性。这项研究的目的是在生长室内使用CeO（2）NPs（0，500 mg kg（-1）干沙）和/或NaCl（0，50 mM）的存在下与甘蓝型油菜的假设进行测试。每隔7天进行三周的新鲜根茎徒手切片，并在荧光显微镜下检查木栓质片的发育。结果证实了一个假设，即CeO（2）NPs修饰了芸苔根中的质外性障碍的形成。在盐胁迫的植物中，CeO（2）NPs缩短了根质外生障碍，从而使更多的Na +转运到芽，并且减少了Na +在植物根中的积累。 Na +通量和转运的改变导致芸苔属的生理性能更好，并可能导致纳米技术在农业中的新应用。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Environmental Pollution》 |2017年第10期|132-138|共7页
  • 作者

    Rossi Lorenzo; Zhang Weilan; Ma Xingmao;

  • 作者单位

    Texas A&M Univ, Zachry Dept Civil Engn, TAMU 3136, College Stn, TX 77843 USA;

    Texas A&M Univ, Zachry Dept Civil Engn, TAMU 3136, College Stn, TX 77843 USA;

    Texas A&M Univ, Zachry Dept Civil Engn, TAMU 3136, College Stn, TX 77843 USA;

  • 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

    Cerium oxide nanoparticles; Brassica napus; Salt stress; Canola; Root barriers;

    机译：氧化铈纳米颗粒;甘蓝型油菜;盐胁迫;油菜;根系障碍;

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