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Full-Text Articles in Pharmacology, Toxicology and Environmental Health
Microbial Extracellular Polymeric Substances (Epss) In Ocean Systems, Alan W. Decho, Tony Gutierrez
Microbial Extracellular Polymeric Substances (Epss) In Ocean Systems, Alan W. Decho, Tony Gutierrez
Faculty Publications
Microbial cells (i.e., bacteria, archaea, microeukaryotes) in oceans secrete a diverse array of large molecules, collectively called extracellular polymeric substances (EPSs) or simply exopolymers. These secretions facilitate attachment to surfaces that lead to the formation of structured ‘biofilm’ communities. In open-water environments, they also lead to formation of organic colloids, and larger aggregations of cells, called ‘marine snow.’ Secretion of EPS is now recognized as a fundamental microbial adaptation, occurring under many environmental conditions, and one that influences many ocean processes. This relatively recent realization has revolutionized our understanding of microbial impacts on ocean systems. EPS occur in a range …
Changing Microspatial Patterns Of Sulfate-Reducing Microorganisms (Srm) During Cycling Of Marine Stromatolite Mats, Alexandru Petrisor, Sandra Szyjka, Tomohiro Kawaguchi, Pieter Visscher, Sean Norman, Alan Decho
Changing Microspatial Patterns Of Sulfate-Reducing Microorganisms (Srm) During Cycling Of Marine Stromatolite Mats, Alexandru Petrisor, Sandra Szyjka, Tomohiro Kawaguchi, Pieter Visscher, Sean Norman, Alan Decho
Faculty Publications
Microspatial arrangements of sulfate-reducing microorganisms (SRM) in surface microbial mats (~1.5 mm) forming open marine stromatolites were investigated. Previous research revealed three different mat types associated with these stromatolites, each with a unique petrographic signature. Here we focused on comparing “non-lithifying” (Type-1) and “lithifying” (Type-2) mats. Our results revealed three major trends: (1) Molecular typing using the dsrA probe revealed a shift in the SRM community composition between Type-1 and Type-2 mats. Fluorescence in-situ hybridization (FISH) coupled to confocal scanning-laser microscopy (CSLM)-based image analyses, and 35SO42−-silver foil patterns showed that SRM were present in surfaces of …
The Eps Matrix As An Adaptive Bastion For Biofilms: Introduction To Special Issue, Alan W. Decho
The Eps Matrix As An Adaptive Bastion For Biofilms: Introduction To Special Issue, Alan W. Decho
Faculty Publications
No abstract provided.