Enhanced quorum sensing of anode biofilm for better sensing linearity and recovery capability of microbial fuel cell toxicity sensor

Quorum sensing regulation methods and their effects on biofilm in biological waste treatment systems: A review

“…Many genera were found that they would be prompted with the QS enhancement in biofilm. Pseudomonas is one of the most common genera, and a significant increasing of its abundance has been found with AHL-mediated QS enhancement in many biological treatment reactors such as SBBR, MBBR, and MFC (Hu et al, 2017;Zhang et al, 2019a;Pan et al, 2020;Zhang et al, 2020), which is consistent with the results of studies on the effects of AHLs on this genus (Davies et al, 1998;Kjelleberg and Molin, 2002;Cellini et al, 2020). Meanwhile, the abundance of Nitrosomonas, a major class of nitrifying bacteria (Phanwilai et al, 2020;Qiu et al, 2020), increases with increasing content of signaling molecules.…”

“…In addition, the abundance of Methanosaeta, which can produce methane and degrade organic matter, is commonly increased by the addition of AHLs (Lv et al, 2018;Ma et al, 2019). Directly using an electron transfer mechanism, the relative abundance of Geoboacter was increased in some electrochemical reactors with biofilm by adding exogenous AHLs that promoted organic matter degradation (Chen et al, 2017;Pan et al, 2020). Some of genera with significantly decreased relative abundances were also shown in the results of highthroughput sequencing for the microbial community in QS-enhanced systems.…”

“…The positive effects of QS enhancement on microbial viability were found by semiquantitative analysis in several bioreactors. Pan et al (2020) observed the double fluorescence stained biofilm on the anode of an MFC fed with C6-HSL and 3-OXO-C12-HSL, and they found that its microbial viability was significantly higher than that without exogenous AHLs. Similar results were also observed in a mixed-culture MFC fed with C4-HSL, C6-HSL and 3-OXO-C12-HSL and a bioelectrochemical system fed with C6-HSL and 3-OXO-C12-HSL (Chen et al, 2017;Fang et al, 2018).…”

Editorial: Frontiers in bacterial quorum sensing research

“…QS plays a vital role in many processes, and numerous milestone discoveries reveal the complexity of its metabolic and signaling networks. Understanding QS related mechanisms is a key step in many applications including anti-pathogen, anti-biofilm, sustainable microbial fuel, bioremediation and agriculture ( Skandamis and Nychas, 2012 ; Pan et al., 2020 ). Therefore, discoveries of QS and QS inhibitor (QSI) opened a door to combating the microbial pathogenesis, reducing the formation of bacterial biofilm, and controlling bioremediation ( Kalia et al., 2019 ).…”

“…The cell density dependent signaling system enables microbial cells to behave as multi-cellular organisms in response to environmental cues during different microbial behaviors like morphogenesis, pathogenesis, competition, and mutualistic coordination, which microbial use as a survival strategy in nature environments.QS plays a vital role in many processes, and numerous milestone discoveries reveal the complexity of its metabolic and signaling networks. Understanding QS related mechanisms is a key step in many applications including anti-pathogen, anti-biofilm, sustainable microbial fuel, bioremediation and agriculture (Skandamis and Nychas, 2012;Pan et al, 2020). Therefore, discoveries of QS and QS inhibitor (QSI) opened a door to combating the microbial pathogenesis, reducing the formation of bacterial biofilm, and controlling bioremediation (Kalia et al, 2019).…”