Abstract
Bacterial quorum sensing (QS) system regulates the production of most costly but sharable extracellular products (public goods) in a growth-phase-dependent manner, and the development of this energy-intensive process is susceptible to environmental changes. However, the role of nutrient factors in dominating the QS-mediated cooperative interaction and intracellular metabolism still remains less understood. Here we studied the performance of QS system by growing Pseudomonas aeruginosa under different nutrient and culture conditions. The results of comparative-transcriptomic analyses revealed that carbon source-limitation was the main factor suppressing the activation of QS system, and a substantial number of public-good-encoding genes were induced when phosphorus is limiting in short-term culture. By contrast, although the QS regulation of P. aeruginosa in all the cultures was generally decreased along with the enrichment of QS-deficient individuals during evolution, limitation of different nutrient factors had discrepant effects in directing the formation of population structure by coordinating the production of public goods and primary metabolism, especially the starch and sucrose metabolism. These findings demonstrate the pleiotropy of QS regulation in balancing the development of cooperative behavior and metabolism, and provide a reference for further understanding the role of QS system in causing persistent infections.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (31700111), the Sichuan Science and Technology Program (2018HH0007), and the Science and Technology Bureau of Chengdu Municipal Government for “Collaboration and Innovation on New Antibiotic Development and Industrialization” (2016-XT00-00023-GX).
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Communicated by Erko Stackebrandt.
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Zhao, K., Li, J., Yuan, Y. et al. Nutrient factor-dependent performance of bacterial quorum sensing system during population evolution. Arch Microbiol 202, 2181–2188 (2020). https://doi.org/10.1007/s00203-020-01937-5
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DOI: https://doi.org/10.1007/s00203-020-01937-5