School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China; Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Zhengzhou University of Light Industry, Zhengzhou, China.
School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China.
Chemosphere. 2018 Oct;208:698-706. doi: 10.1016/j.chemosphere.2018.06.040. Epub 2018 Jun 6.
With the development of nanotechnology, nanomaterials have been widely applied in anti-bacterial coating, electronic device, and personal care products. NanoZnO is one of the most used materials and its ecotoxicity has been extensively studied. To explore the potential phototoxicity of nanoZnO induced by visible light, we conducted a long-term experiment on litter decomposition of Typha angustifolia leaves with assessment of fungal multifaceted natures. After 158 d exposure, the decomposition rate of leaf litter was decreased by nanoZnO but no additional effect by visible light. However, visible light enhanced the inhibitory effect of nanoZnO on fungal sporulation rate due to light-induced dissolution of nanoZnO. On the contrary, enzymes such as β-glucosidase, cellobiohydrolase, and leucine-aminopeptidase were significantly increased by the interaction of nanoZnO and visible light, which led to high efficiency of leaf carbon decomposition. Furthermore, different treatments and exposure time separated fungal community associated with litter decomposition. Therefore, the study provided the evidence of the contribution of visible light to nanoparticle phototoxicity at the ecosystem level.
随着纳米技术的发展，纳米材料已广泛应用于抗菌涂料、电子设备和个人护理产品。纳米氧化锌是应用最广泛的材料之一，其生态毒性已得到广泛研究。为了探究可见光诱导纳米氧化锌的潜在光毒性，我们对香蒲叶片的凋落物分解进行了长期实验，评估了真菌的多方面性质。在 158 天的暴露后，纳米氧化锌降低了叶片凋落物的分解率，但可见光没有额外的影响。然而，可见光增强了纳米氧化锌对真菌孢子形成率的抑制作用，这是由于光诱导纳米氧化锌的溶解。相反，β-葡萄糖苷酶、纤维二糖水解酶和亮氨酸氨肽酶等酶由于纳米氧化锌和可见光的相互作用而显著增加，这导致叶片碳分解的效率很高。此外，不同的处理和暴露时间分离了与凋落物分解相关的真菌群落。因此，该研究为在生态系统水平上观察到可见光对纳米颗粒光毒性的贡献提供了证据。
