Bumblebees with the socially transmitted microbiome: A novel model organism for gut microbiota research
2022
Zhang, Zi‐Jing | Zheng, Hao
Eusocial bumble and honey bees are important pollinators for global ecology and the agricultural economy. Although both the bumble and honey bees possess similar and host‐restricted gut microbiota, they differ in aspects of morphology, autonomy, physiology, behavior, and life cycle. The social bee gut bacteria exhibit host specificity that is likely a result of long‐term co‐evolution. The unique life cycle of bumblebees is key for the acquisition and development of their gut microbiota, and affects the strain‐level diversity of the core bacterial species. Studies on bumblebee gut bacteria show that they retain less functional capacity for carbohydrate metabolism compared with that of the honeybee. We discuss the potential roles of the bumblebee gut microbiota against pathogenic threats and the application of host‐specific probiotics for bumblebees. Given the advantages of the bumblebee microbiome, including the simple structure and host specificity, and the ease of manipulating bumblebee colonies, we propose that bumblebees may provide a valuable system for understanding the general principles of host–microbe interactions, gut–brain axis, and vertical transmission.
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