Figure 1: Effect of the mean pairwise genetic distance of Pseudomonas spp. communities on the emergence and spread of signal-blind defectors.
From: Evolutionary history predicts the stability of cooperation in microbial communities

Communities (100% cooperators at the beginning of the experiment) were grown on QSM medium for 48 h. Signal-blind defectors were discriminated by their lack of proteolytic and tryptophan dioxygenase activity and expressed as per cent of the community after 48 h (GLM, R2=0.72, P<0.001). Symbol shading shows the richness of the different communities: white, monocultures; light grey, two genotypes; dark grey, four genotypes; and black, eight genotypes.