Electroactivity of the magnetotactic bacteria Magnetospirillum magneticum AMB-1 and Magnetospirillum gryphiswaldense MSR-1

IF 6.1 2区 环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL
Mathias Fessler, Qingxian Su, Marlene Mark Jensen, Yifeng Zhang
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Abstract

Magnetotactic bacteria reside in sediments and stratified water columns. They are named after their ability to synthesize internal magnetic particles that allow them to align and swim along the Earth’s magnetic field lines. Here, we show that two magnetotactic species, Magnetospirillum magneticum strain AMB-1 and Magnetospirillum gryphiswaldense strain MSR-1, are electroactive. Both M. magneticum and M. gryphiswaldense were able to generate current in microbial fuel cells with maximum power densities of 27 and 11 µW/m2, respectively. In the presence of the electron shuttle resazurin both species were able to reduce the crystalline iron oxide hematite (Fe2O3). In addition, M. magneticum could reduce poorly crystalline iron oxide (FeOOH). Our study adds M. magneticum and M. gryphiswaldense to the growing list of known electroactive bacteria, and implies that electroactivity might be common for bacteria within the Magnetospirillum genus.

Abstract Image

磁性细菌 Magnetospirillum magneticum AMB-1 和 Magnetospirillum gryphiswaldense MSR-1 的电活性
磁动细菌生活在沉积物和分层水柱中。它们因能合成内部磁性颗粒而得名,这种磁性颗粒能让它们沿着地球磁场线排列和游动。在这里,我们展示了两种具有磁性的物种--Magnetospirillum magneticum 菌株 AMB-1 和 Magnetospirillum gryphiswaldense 菌株 MSR-1--具有电活性。M.magneticum和M.gryphiswaldense都能在微生物燃料电池中产生电流,最大功率密度分别为27微瓦/平方米和11微瓦/平方米。在有电子穿梭机雷沙祖林存在的情况下,这两种生物都能还原赤铁矿(Fe2O3)结晶氧化铁。此外,磁蝇还能还原结晶度较低的氧化铁(FeOOH)。我们的研究使磁孢蘑菇属(Magnetospirillum)和蝼蛄属(M. gryphiswaldense)成为越来越多的已知电活性细菌中的一员,并暗示电活性可能是磁孢蘑菇属细菌的共同特点。
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来源期刊
Frontiers of Environmental Science & Engineering
Frontiers of Environmental Science & Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES
CiteScore
10.90
自引率
12.50%
发文量
988
审稿时长
6.1 months
期刊介绍: Frontiers of Environmental Science & Engineering (FESE) is an international journal for researchers interested in a wide range of environmental disciplines. The journal''s aim is to advance and disseminate knowledge in all main branches of environmental science & engineering. The journal emphasizes papers in developing fields, as well as papers showing the interaction between environmental disciplines and other disciplines. FESE is a bi-monthly journal. Its peer-reviewed contents consist of a broad blend of reviews, research papers, policy analyses, short communications, and opinions. Nonscheduled “special issue” and "hot topic", including a review article followed by a couple of related research articles, are organized to publish novel contributions and breaking results on all aspects of environmental field.
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