The research goal of the Remus-Emsermann group is the understanding of the microbial ecology of plant-leaf colonizing bacteria with wide implications for agriculture and biocontrol (Fig. 1). The aim of the Antelmann group is to elucidate the adaptation mechanisms of pathogens towards redox-active compounds and antibiotics, which are encountered during infections (Fig. 2). In addition, the Antelmann group investigates bacterial defense mechanisms upon bacteriophage infections.