TY - JOUR T1 - Quorum Sensing Regulates Bacterial Processes That Play a Major Role in Marine Biogeochemical Cycles A1 - Urvoy,Marion A1 - Labry,Claire A1 - L Helguen,Stephane A1 - Lami,Raphaël AD - Ifremer, DYNECO, Plouzané, France AD - Université de Bretagne Occidentale, CNRS, IRD, Ifremer, UMR 6539, Laboratoire des Sciences de l’Environnement Marin (LEMAR), Plouzané, France AD - Sorbonne Université, CNRS, Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM, USR 3579), Observatoire Océanologique de Banyuls, Banyuls-sur-Mer, France AD - Université de Bretagne Occidentale, CNRS, IRD, Ifremer, UMR 6539, Laboratoire des Sciences de l’Environnement Marin (LEMAR), Plouzané, France UR - https://archimer.ifremer.fr/doc/00749/86099/ DO - 10.3389/fmars.2022.834337 KW - marine bacteria KW - quorum sensing KW - AHL (N-acyl-homoserine lactone) KW - biogeochemical cycle KW - hydrolytic enzyme KW - organic matter degradation KW - nutrient acquisition N2 - Bacteria play a crucial role in marine biogeochemistry by releasing, consuming and transforming organic matter. Far from being isolated entities, bacteria are involved in numerous cell–cell interactions. Among such interactions, quorum sensing (QS) allows bacteria to operate in unison, synchronizing their actions through chemical communication. This review aims to explore and synthesize our current knowledge of the involvement of QS in the regulation of bacterial processes that ultimately impact marine biogeochemical cycles. We first describe the principles of QS communication and the renewed interest in its study in marine environments. Second, we highlight that the microniches where QS is most likely to occur due to their high bacterial densities are also hotspots of bacterially mediated biogeochemical transformations. Many bacterial groups colonizing these microniches harbor various QS systems. Thereafter, we review relevant QS-regulated bacterial processes in marine environments, building on research performed in both complex marine assemblages and isolated marine bacteria. QS pathways have been shown to directly regulate organic matter degradation, carbon allocation and nutrient acquisition but also to structure the community composition by mediating colonization processes and microbial interactions. Finally, we discuss current limitations and future perspectives to better characterize the link between QS expression and the bacterial mediation of biogeochemical cycles. The picture drawn by this review highlights QS as one of the pivotal mechanisms impacting microbial composition and functions in the oceans, paving the way for future research to better constrain its impact on marine biogeochemical cycles. Y1 - 2022/02 PB - Frontiers Media SA JF - Frontiers In Marine Science SN - 2296-7745 VL - 9 ID - 86099 ER -