期刊
FEMS MICROBIOLOGY LETTERS
卷 220, 期 2, 页码 229-233出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0378-1097(03)00130-7
关键词
ferric iron-reducing bacteria; Geobacteraceae; electron-shuttling compounds; ferrihydrite in agar
类别
Iron-reducing bacteria can transfer electrons to ferric iron oxides which are barely soluble at neutral pH, and electron-shuttling compounds or chelators are discussed to be involved in this process. Experiments using semipermeable membranes for separation of ferric iron-reducing bacteria from ferric iron oxides do not provide conclusive results in this respect. Here, we used ferrihydrite embedded in 1% agar to check for electron-shuttling compounds in pure and in enrichment cultures. Geobacter sulfurreducens reduced spatially distant ferrihydrite only in the presence of anthraquinone-2,6-disulfonate, a small molecule known to shuttle electrons between the bacterial cell and ferrihydrite. However, indications for the production and excretion of electron-shuttling compounds or chelators were found in ferrihydrite-containing agar dilution cultures that were inoculated with ferric iron-reducing enrichment cultures. (C) 2003 Published by Elsevier Science B.V. on behalf of the Federation of European Microbiological Societies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据