Marion Urvoy

Marion Urvoy
The Ohio State University | OSU · Department of Microbiology

PhD

About

6
Publications
558
Reads
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7
Citations
Introduction
I am a marine biologist interested in the processes structuring microbial communities and their impact on global marine biogeochemical cycles. I am especially curious about how cell-cell communication processes such as quorum sensing mediate microbial interactions. I recently finished my Ph.D. at the University of Western Brittany (France) and am now starting a postdoc at the Ohio State University.
Additional affiliations
October 2018 - April 2022
Université de Bretagne Occidentale
Position
  • PhD Student
Description
  • Extracellular hydrolytic enzymes and bacterial diversity in the Aulne estuary (Bay of Brest, France): regulation factors and role of Quorum sensing
February 2018 - August 2018
Station Biologique de Roscoff
Position
  • Master's Student
Description
  • Ecological implications of marine viruses bound polysaccharidases
Education
September 2013 - January 2018
Institut National des Sciences Appliquées de Toulouse
Field of study
  • Biochemical engineering

Publications

Publications (6)
Article
Full-text available
Bacteria play an important role in biogeochemical cycles as they transform and remineralize organic matter. Particles are notable hotspots of activity, hosting particle-attached (PA) communities that can differ largely from their free-living (FL) counterparts. However, long-standing questions remain concerning bacterial community assembly processes...
Article
Full-text available
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. Thi...
Article
Full-text available
Heterotrophic microbial communities play a central role in biogeochemical cycles in the ocean by degrading organic matter through the synthesis of extracellular hydrolytic enzymes. Their hydrolysis rates result from the community’s genomic potential and the differential expression of this genomic potential. Cell-cell communication pathways such as...
Article
Full-text available
Biofilms of heterotrophic bacteria cover organic matter aggregates and constitute hotspots of mineralization, primarily acting through extracellular hydrolytic enzyme production. Nevertheless, regulation of both biofilm and hydrolytic enzyme synthesis remains poorly investigated, especially in estuarine ecosystems. In this study, various bioassays,...
Article
Full-text available
Alkaline phosphatases are the main enzymes required by microorganisms to hydrolyse organic phosphorus into available phosphate in aquatic environments. The investigations of alkaline phosphatase activity (APA) usually generate numerous samples (size fractionation, Michaelis-Menten kinetics). Therefore, convenient and reliable preservation of incuba...
Article
As microbial enzymatic activities initiate the mineralization of organic matter through the microbial loop, it is important to correctly measure those activities and be able to perform inter‐study comparisons. Enzymatic activity assays are typically carried out using fluorogenic substrate analogs, such as 4‐methylumbelliferone and 7‐amino‐4‐methylc...

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Projects

Project (1)
Project
To better understand how Quorum sensing regulates bacterial processes involved in organic matter degradation and biogeochemical cycles in the oceans.