Thermodynamics of interspecies electron transfer: from syntrophy to parasitism

摘要：

　　Interspecies Electron Transfer (IET) is a mechanism that allows energetic coupling between two microorganisms.It plays a key role in a wide range of environmental and biotechnological microbial ecosystems and stimulation of Direct Interspecies Electron Transfer (DIET) appears as an attractive way to boost anaerobic digestion.However,studies dealing with IET have,so far,mostly restrained on the possible syntrophic interactions supported by this mechanism.In the present work,the case of a fermentative bacterium receiving extracellular electrons while fermenting a substrate is considered.By applying microbial thermodynamics to experimental data previously published,we show that IET can promote a wide range of interactions such as mutualism,commensalism or parasitism.In the case of glycerol fermentation IET indeed leads to a diminution of bacterial biomass production concomitantly with an increased production of reduced compounds such as 1,3-propanediol.Thus,our study indicates that IET probably plays an important role nowadays underestimated in microbial interactions networks giving interesting perspectives for the optimization and control ofbioprocesses using IET stimulation.

关键词： Interspecies Electron Transfer (IET) microbial thermodynamics microbial interactions

作者: E.Desmond-Le Quéméner R.Moscoviz C.Flayac E.Trably N.Bernet

作者单位: LBE, INRA, 102 avenue des Etangs, 11100, Narbonne

会议类型: 国际会议

会议名称: The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)

会议地点: 北京

会议语种:英文

页码: 61-64

在线出版日期: 2017-10-17（万方平台首次上网日期，不代表论文的发表时间）