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首页> 外文期刊>Environmental Science & Technology >New Perspective on the Nanoplastics Disrupting the Reproduction of an Endangered Fern in Artificial Freshwater
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New Perspective on the Nanoplastics Disrupting the Reproduction of an Endangered Fern in Artificial Freshwater

机译：纳米塑料破坏人工淡水中濒危蕨类植物繁殖的新观点

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摘要

The potential risks of microanoplastics on the ecological environment, particularly aquatic fauna, have been realized in recent years. However, information about its potential effects on aquatic plants is scarce. In this study, a four-week exposure experiment was conducted to investigate the effects of varying polystyrene nanoplastics concentration (PS-NPs, 0-100 mu g/mL) on the early development of an endangered aquatic plant, Ceratopteris pteridoides. Fluorescent observations demonstrated that PS-NPs were adsorbed and accumulated on the spore surface of C. pteridoides rapidly and massively with increasing exposure concentration and time. The adsorption and accumulation of PS-NPs on the spore surface posed a negative effect on spore imbibition, causing 2.3-22.4% reduction in final spore size. Spore germination and gametophyte sex differentiation were both negatively affected by PS-NP exposure, resulting in 10.4-88.0% inhibition in germination ratio and 2.9-53.4% reduction in hermaphroditic gametophyte ratio. Additionally, PS-NPs were observed to penetrate into the roots of gametophytes. Higher concentration of PS -NPs (100 mu g/mL) can even induce pathological changes on gametophytes, although with a low incidence (4.9%). The results above indicated that exposure to PS-NPs caused a series of disruptions from the spore imbibition to germination and gametophyte stages, and are likely to pose an eco-physiological risk on the reproductive success of endangered ferns.
机译：近年来已经认识到微/纳米塑料对生态环境，特别是水生动物的潜在风险。但是，关于其对水生植物潜在影响的信息很少。在这项研究中，进行了一个为期四周的暴露实验，以研究各种聚苯乙烯纳米塑料浓度（PS-NP，0-100μg / mL）对濒危水生植物拟翅藻的早期发育的影响。荧光观察表明，随着暴露浓度和时间的增加，PS-NPs迅速大量地吸附并积累在蝶形藻的孢子表面上。 PS-NPs在孢子表面的吸附和积累对孢子的吸收有负面影响，使最终孢子的大小减少了2.3-22.4％。孢子萌发和配子体性别分化均受到PS-NP暴露的负面影响，导致发芽率抑制10.4-88.0％，雌雄同体配子体比率降低2.9-53.4％。此外，观察到PS-NP渗透到配子体的根部。较高浓度的PS -NPs（100μg / mL）甚至可以诱导配子体上的病理变化，尽管发生率较低（4.9％）。上面的结果表明，暴露于PS-NP会导致从孢子吸收到发芽和配子体阶段的一系列破坏，并且可能对濒临灭绝的蕨类植物的繁殖成功构成生态生理风险。

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  • 来源
    《Environmental Science & Technology》 |2019年第21期|12715-12724|共10页
  • 作者

    Yuan Wenke; Zhou Yanfei; Liu Xiaoning; Wang Jun;

  • 作者单位

    Chinese Acad Sci Wuhan Bot Garden Key Lab Aquat Bot & Watershed Ecol Wuhan 430074 Hubei Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci Wuhan Bot Garden Key Lab Aquat Bot & Watershed Ecol Wuhan 430074 Hubei Peoples R China;

    Chinese Acad Sci Wuhan Bot Garden Key Lab Aquat Bot & Watershed Ecol Wuhan 430074 Hubei Peoples R China|South China Agr Univ Coll Marine Sci Guangzhou 510642 Guangdong Peoples R China|Hainan Normal Univ Coll Life Sci Key Lab Ecol Trop Isl Minist Educ Haikou 571158 Hainan 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);
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