Nanoscale zero-valent iron alters physiological, biochemical, and transcriptomic response of nonylphenol-exposed algae (Dictyosphaerium sp.)
Nanoscale zero-valent iron alters physiological, biochemical, and transcriptomic response of nonylphenol-exposed algae (Dictyosphaerium sp.)
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纳米级零价铁改变了暴露于壬基酚的藻类（Dictyosphaerium sp.）的生理、生化和转录组反应
DOI：
10.1007/s11356-021-17199-7
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发表时间：
2021-11-06
影响因子：
5.8
通讯作者：
Xu, Ligen
中科院分区：
文献类型：
--
作者：
Jiang, Ying;Du, Linna;Xu, Ligen
纳米颗粒和有机污染物是水生环境中发现的两种主要污染物。藻类被视为水体污染物风险评估的模式生物。在我们之前的研究中，我们研究了典型的有机水污染物壬基酚（NP）对藻类的毒性作用；然而，目前尚不清楚藻类如何对纳米颗粒和纳米颗粒的共存做出反应。在本研究中，将纳米级零价铁（nZVI；10、50、100 和 200 mg/L）的浓度梯度添加到暴露于 NP 的网盘菌中。研究该组合的毒性作用和去除 NP 的潜力。 nZVI 对 NP 暴露的藻类具有剂量依赖性作用，高 nZVI 浓度显着降低藻类生物量和色素含量，并严重破坏藻类细胞超微结构。此外，当接触 NP 的藻类与 nZVI 一起孵育时，参与抗氧化反应、光合作用和核糖体合成的基因发生显着改变。与高浓度的 nZVI 相比，添加小浓度的 nZVI 可以降低暴露于 NP 的藻类的毒性，同时显着提高 NP 的去除率。这项研究提高了我们对藻类对各种污染物反应的理解，并表明 nZVI 可能有助于水生生态系统中 NP 的修复。
Nanoparticles and organic pollutants are two major contaminants found in aquatic environments. Algae are regarded as the model organism for the risk assessment of pollutants in water. In our previous study, we investigated the toxic effects of nonylphenol (NP), a typical organic water pollutant, on algae; however, it remains unclear how algae respond to the coexistence of NP and nanoparticles. In this study, a concentration gradient of nanoscale zero-valent iron (nZVI; 10, 50, 100, and 200 mg/L) was added to NP-exposed Dictyosphaerium sp. to investigate both the toxic effects of this combination and the potential for NP removal. nZVI had a dose-dependent effect on NP-exposed algae, with high nZVI concentrations significantly decreasing algal biomass and pigment content, as well as severely damaging algal cellular ultrastructure. In addition, genes involved in antioxidant response, photosynthesis, and ribosome synthesis were significantly altered when NP-exposed algae were incubated with nZVI. In contrast to high nZVI concentrations, adding a small concentration of nZVI led to reduced toxicity in NP-exposed algae, while significantly enhancing the NP removal rate. This study improves our understanding of algal responses to various pollutants and suggests that nZVI may assist in the remediation of NP in aquatic ecosystems.