Evolution of Interbacterial Antagonism in Bee Gut Microbiota Reflects Host and Symbiont Diversification

Abstract

Antagonistic interactions between bacteria affect diversity and dynamics of host-associated communities, including gut communities that are linked to host health. In many bacterial communities, including human and honey bee gut microbiotas, antagonism is mediated by type VI secretion systems (T6SSs) that deliver lethal toxins to competing strains.