Jo Philips – visit and talk

Jo, now an Assistant Prof. at Aarhus University visited us on the 10th of January. Jo presented her recent work on corrosion by acetogenic bacteria. It was great to see Jo again and discuss possible future collaborations.

 

Tenure

I have been granted tenure after three years as Assistant Professor at the University of Southern Denmark. Today, 1st of November 2018, is my first day in the capacity of tenured Associate Professor. I am excited about my new role and curious to learn and develop further.

New preprint from our lab

In incubations originated from the sediments of a ferruginous, early Earth analogue lake, we were surprised to discover that the interspecies association between Youngiibacter and Methanothrix was strictly dependent on conductive particles. Here is a link to our paper.

The implication of this study is that mineral-syntrophy could be the relic of ancestral associations between protocells splitting metabolic tasks, prior to the evolution of a complex EET-apparatus required for today’s interspecies associations.

Methanogenesis on different substrates in incubations from lake La Cruz. Methane production in initial slurry incubations provided with different substrates was stimulated by conductive particles (GAC or magnetite) independent of the media used (a) modified DSMZ 120 or (b) DSMZ 334. (c) Acetate accumulated in incubations without conductive particles was significantly lower at the addition of conductive particles. (d) For example, a third transfer free of sediment showed that methanogenesis and acetate consumption were both strictly dependent of the presence of conductive particles (colored symbols), and ceased if conductive particles were not added consistently for subsequent transfers (white symbols).