Knut Drescher

Knut Drescher

Prof. Dr. Knut Drescher

Max Planck Institute for Terrestrial Microbiology
Bacterial Biofilms
Karl-von-Frisch-Straße 16, 35043 Marburg
+49-6421 28 21473

 

Research Area

The lab focuses on understanding collective bacterial behaviors, using biofilm formation as a model system. Bacterial biofilms are surface-associated bacterial communities that are held together by an extracellular matrix. Cells within these communities are highly resistant to antibiotics and display strong phenotypic heterogeneity. Using microscopy, molecular biology techniques, and mathematical modeling, we study how bacteria form these complex multicellular biofilm communities, and how biofilms affect bacterial ecology. 

Biofilms in Ecology and Evolution

Why do bacteria form biofilms? Bacteria that are bound in biofilms are highly resistant against antibiotics and other chemical insults of the environment, which is a clear evolutionary advantage of forming biofilms. However, we recently discovered another reason for why bacteria may want to form biofilms: physical aspects of the biofilm life style strongly favor the evolution of simple social behaviors, such as the production of shared resources or "public goods".

[Drescher, et al. 2014; Nadell, et al. 2013]

Biofilm Dynamics

How do biofilms grow in realistic physical and chemical environments? Biofilms are often thought to occur as surface-attached films. However, in conditions that mimic their natural habitats, biofilms of P. aeruginosa and S. aureus are deformed into string-like structures. We discovered that these structures have a mesh-like architecture that captures other cells that are flowing past to grow explosively fast and cause rapid clogging of various industrial, environmental, and medical flow systems.

[Drescher, et al. 2013; Kim, et al. 2014]

Biophysics of Collective Behaviors

What can we learn about collective bacterial behaviors from physics? Many aspects of bacterial interactions are inherently physical. Some examples: During biofilm growth, cells push and pull on each other, while being embedded in an elastic matrix. Understanding the molecular transport of nutrients and metabolites through the biofilm also relies on physics. Before bacteria form biofilms, their swimming motility creates fluid flows that lead to physical interactions with surfaces and other bacteria.

[Drescher, et al. 2011; Wensink, et al. 2012; Dunkel, et al. 2014]

SYNMIKRO Young Researchers Groups

Almost all scientific members of SYNMIKRO are actively involved in DFG’s Collaborative Research Centers (Sonderforschungsbereiche), Research Training Groups (Graduiertenkollegs), or other Cooperative Research projects. Alongside performing adventurous experiments, and reporting excellent science, SYNMIKRO substantially promotes potential Young Research Group Leaders by constantly keeping its doors open to welcome and support Young Researchers planning to set up an Independent Research Group.
Our Young Research Groups