Effect of ferrihydrite biomineralization on methanogenesis in an anaerobic incubation from paddy soil
Effect of ferrihydrite biomineralization on methanogenesis in an anaerobic incubation from paddy soil
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水铁矿生物矿化对水稻土厌氧培养产甲烷的影响
DOI：
10.1002/2014jg002893
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发表时间：
2015-05
影响因子：
3.7
通讯作者：
Zhou Shungui
中科院分区：
文献类型：
--
作者：
Zhuang Li;Xu Jielong;Tang Jia;Zhou Shungui
微生物对Fe（III）的还原可能是控制水稻土和湿地等厌氧沉积环境中甲烷生成的主要因素之一。虽然铁（III）还原后的二次铁矿化是一个随时间自然发生的过程，但在产甲烷系统中尚未考虑到这一过程。本研究对水稻土和添加水合铁的土壤进行了长期厌氧培养，以研究水合铁生物矿化过程中的甲烷生成。结果表明，在以往的研究中，水合铁对甲烷生成的长期影响可能是增强而不是抑制。在最初的微生物水合铁还原过程中，甲烷生成受到抑制；在平均产甲烷率和醋酸盐利用率方面，磁铁矿次生矿物与促进产甲烷同时发生。在磁铁矿形成阶段，微生物群落分析显示，在铁水合物补充培养中，土杆菌、芽孢杆菌和沉积杆菌以及古细菌甲烷菌受到了强烈的刺激。Geobacter和Methanosarcina之间通过导电磁铁矿直接电同步作用是加速甲烷生成和磁铁矿形成的可能机制。我们的数据表明，铁矿物学的变化可能会影响厌氧有机物向甲烷的转化，并可能为通过铁施肥减少水稻土甲烷排放提供新的视角。
Microbial reduction of Fe(III) can be one of the major factors controlling methane production from anaerobic sedimentary environments, such as paddy soils and wetlands. Although secondary iron mineralization following Fe(III) reduction is a process that occurs naturally over time, it has not yet been considered in methanogenic systems. This study performed a long‐term anaerobic incubation of a paddy soil and ferrihydrite‐supplemented soil cultures to investigate methanogenesis during ferrihydrite biomineralization. The results revealed that the long‐term effect of ferrihydrite on methanogenesis may be enhancement rather than suppression documented in previous studies. During initial microbial ferrihydrite reduction, methanogenesis was suppressed; however, the secondary minerals of magnetite formation was simultaneous with facilitated methanogenesis in terms of average methane production rate and acetate utilization rate. In the phase of magnetite formation, microbial community analysis revealed a strong stimulation of the bacterial Geobacter, Bacillus, and Sedimentibacter and the archaeal Methanosarcina in the ferrihydrite‐supplemented cultures. Direct electric syntrophy between Geobacter and Methanosarcina via conductive magnetite is the plausible mechanism for methanogenesis acceleration along with magnetite formation. Our data suggested that a change in iron mineralogy might affect the conversion of anaerobic organic matter to methane and might provide a fresh perspective on the mitigation of methane emissions from paddy soils by ferric iron fertilization.
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影响因子：
3.7
作者：
Atekwana, Estella A.;Mewafy, Farag M.;Slater, Lee D.
通讯作者：
Slater, Lee D.
DOI：
10.1073/pnas.0404040101
发表时间：
2004-11
影响因子：
11.1
作者：
H. Vali;B. Weiss;Yiliang Li;S. Sears;S. Kim;J. Kirschvink;Chuanlun Zhang
通讯作者：
H. Vali;B. Weiss;Yiliang Li;S. Sears;S. Kim;J. Kirschvink;Chuanlun Zhang
影响因子：
3.6
作者：
Chin, KJ;Lueders, T;Conrad, R
通讯作者：
Conrad, R
影响因子：
4.4
作者：
Holmes, DE;Finneran, KT;Lovley, DR
通讯作者：
Lovley, DR
影响因子：
5
作者：
F. Trolard;J. Génin;M. Abdelmoula;G. Bourrié;B. Humbert;A. Herbillon
通讯作者：
F. Trolard;J. Génin;M. Abdelmoula;G. Bourrié;B. Humbert;A. Herbillon