When neighbors control metabolite fate: consequences for plant pathogen virulence and biocontrol outcomes

Microbial interactions can profoundly influence the activity of bioactive metabolites in plant-associated communities. De Rop et al. show that community members enzymatically degrade cyclic lipopeptides (CLiPs), metabolites that act both as virulence factors in plant pathogens and antimicrobial agents in biological control (J. De Rop, D. Prasad, N. Geudens, L. Zhou, et al., Appl Environ Microbiol 92:e01524-25, 2026, https://doi.org/10.1128/aem.01524-25). By neutralizing these molecules, microbes determine whether CLiP-mediated activities persist or collapse, revealing that metabolite function depends on community-mediated turnover and highlighting an underappreciated ecological layer that shapes plant disease and biocontrol outcomes.