Biosciences Institute, São Paulo State University (UNESP), São Vicente, SP, Brazil; Instituto de Estudos Avançados do Mar (IEAMar), São Paulo State University, São Vicente, SP, Brazil; Laboratório de Biotecnologia Industrial, Instituto de Pesquisa Tecnológica do Estado de São Paulo, São Paulo, SP, Brazil.
Biosciences Institute, São Paulo State University (UNESP), São Vicente, SP, Brazil.
Chemosphere. 2020 Jan;239:124698. doi: 10.1016/j.chemosphere.2019.124698. Epub 2019 Aug 29.
Synthetic silver nanoparticles (AgNPs) are being extensively used in our daily lives; however, they may also pose a risk to public health and environment. Nowadays, biological AgNPs are considered an excellent alternative, since their synthesis occurs by a green technology of low cost and easy scaling. However, studies with these biological nanomaterials (NM) are still limited. Thus, a more careful assessment of their industrial application, economic feasibility and ecotoxicological impacts is crucial. The aim of this study was to investigate the effects of different concentrations of mangrove fungus Aspergillus tubingensis AgNPs on the aerobic heterotrophs soil microorganisms, rice seeds (Oryza sativa) and zebrafish (Danio rerio). Biogenic AgNPs were less harmful for soil microbiota compared to AgNO. On rice seeds, the AgNPs displayed a dose-dependent inhibitory effect on germination and their subsequent growth and development. The percentage of inhibition of rice seed germination was 30, 69 and 80% for 0.01, 0.1 and 0.5 mM AgNPs, respectively. After 24 h of AgNPs exposition at a limit concentration of 0.2 mM, it did not induce mortality of the zebrafish D. rerio. Overall, A. tubingensis AgNPs can be considered as a suitable alternative to synthetic nanoparticles.
合成银纳米颗粒（AgNPs）在我们的日常生活中被广泛应用；然而，它们也可能对公共健康和环境构成威胁。如今，生物 AgNPs 被认为是一种很好的替代品，因为它们的合成是通过一种低成本、易于规模化的绿色技术进行的。然而，对这些生物纳米材料（NM）的研究仍然有限。因此，更仔细地评估它们的工业应用、经济可行性和生态毒理学影响至关重要。本研究的目的是研究不同浓度的红树林真菌 Aspergillus tubingensis AgNPs 对好氧异养土壤微生物、水稻种子（Oryza sativa）和斑马鱼（Danio rerio）的影响。与 AgNO 相比，生物 AgNPs 对土壤微生物群的危害较小。在水稻种子上，AgNPs 对发芽及其随后的生长和发育表现出剂量依赖性抑制作用。AgNPs 的抑制率分别为 0.01、0.1 和 0.5mM 时为 30%、69%和 80%。在 0.2mM 的极限浓度下暴露 24 小时后，AgNPs 没有诱导斑马鱼 D. rerio 的死亡。总的来说，A. tubingensis AgNPs 可以被认为是合成纳米颗粒的合适替代品。
