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This study identifies the two-component system ChvGI as essential for the honey bee symbiont Bombella apis to survive in challenging host environments, particularly royal jelly and the larval gut. Using experimentally evolved bacterial strains, researchers demonstrated that ChvGI regulates critical survival functions including motility, flagellar production, and biofilm formation in response to environmental stressors. The findings reveal a conserved genetic mechanism used by Alphaproteobacteria to adapt to diverse symbiotic relationships.
Why it matters
Understanding how beneficial bacteria colonize and persist in honey bees could inform strategies to maintain healthy bee microbiomes, which is crucial given ongoing pollinator declines. The identification of ChvGI as a master regulator in multiple Alphaproteobacteria suggests potential applications for manipulating other agriculturally or medically important bacterial symbionts.
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⚠️ Preprint – Noch nicht peer-reviewed
Dieser Artikel wurde noch nicht von unabhängigen Experten begutachtet. Die Ergebnisse sind vorläufig und sollten mit Vorsicht interpretiert werden.
Elucidating how microbes associate with their hosts and respond to different environments is fundamental to our understanding of symbiosis. Here, we investigate the molecular and genetic mechanisms enabling the honey bee symbiont Bombella apis to colonize and persist in harsh honey bee microenvironments, like royal jelly and the larval gut. By using evolved B. apis strains, we demonstrate that the broadly conserved two-component system (TCS) ChvGI is integral for the bacteriums ability to withstand royal jelly and the larval gut. Furthermore, we show that in B. apis ChvGI also regulates critical bacterial behaviors such as motility, flagellar production, and biofilm formation. In other Alphaproteobacteria, ChvGI is known as a master regulator that mediates the bacterial responses to stressors and is also found to be involved in symbiosis, often through the production of EPS and biofilm formation. Our work underscores the broader significance of ChvGI as an important TCS in Alphaproteobacteria that regulates bacterial behavior in response to different types of stressors and uncovers a genetic mechanism that allows an important honey bee symbiont to survive in diverse host environments.
Source: Complex roles for a conserved two-component system in a honey bee symbiosis