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题名: Superoxide-Mediated Extracellular Biosynthesis of Silver Nanoparticles by the Fungus Fusarium oxysporum
作者: Yin, Yongguang; Yang, Xiaoya; Hu, Ligang; Tan, Zhiqiang; Zhao, Lixia; Zhang, Zhen; Liu, Jingfu; Jiang, Guibin
刊名: ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
出版日期: 2016-04
卷号: 3, 期号:4, 页码:160-165
DOI: 10.1021/acs.estlett.6b00066
部门归属: 环境化学与生态毒理学国家重点实验室
英文摘要: The biosynthesis of silver nanoparticles (AgNPs) by microorganisms has become a hot topic in recent years, although its mechanism is still not well understood. Here we report the extracellular biosynthesis of AgNPs by the fungus Fusarium oxysporum through a superoxide-dependent mechanism. Reduction of Ag+ to AgNPs in the extracellular region of F. oxysporum was verified by transmission electron microscopy, while the superoxide produced extracellularly by F. oxysporum was evidenced by chemiluminescence. We further demonstrated that the biosynthesis of AgNPs was inhibited by a superoxide scavenger or the inhibitor of NADH oxidases, and the addition of NADH significantly improved the formation of AgNPs. These results demonstrated that, for the first time, the fungus F. oxysporum can mediate the synthesis of AgNPs through the enzymatic generation of extracellular superoxide, which is helpful in understanding the biosynthesis of AgNPs and the biomineralization and transformation of silver and other metals or metalloids.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35955
Appears in Collections:环境化学与生态毒理学国家重点实验室_期刊论文

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