Modeling microbial metabolic trade-offs in a chemostat.

TitleModeling microbial metabolic trade-offs in a chemostat.
Publication TypeJournal Article
Year of Publication2020
AuthorsLi, Z, Liu, B, Li, SHsin-Jung, King, CG, Gitai, Z, Wingreen, NS
JournalPLoS Comput Biol
Date Published2020 08
KeywordsBacteria, Biochemical Phenomena, Bioreactors, Models, Biological

<p>Microbes face intense competition in the natural world, and so need to wisely allocate their resources to multiple functions, in particular to metabolism. Understanding competition among metabolic strategies that are subject to trade-offs is therefore crucial for deeper insight into the competition, cooperation, and community assembly of microorganisms. In this work, we evaluate competing metabolic strategies within an ecological context by considering not only how the environment influences cell growth, but also how microbes shape their chemical environment. Utilizing chemostat-based resource-competition models, we exhibit a set of intuitive and general procedures for assessing metabolic strategies. Using this framework, we are able to relate and unify multiple metabolic models, and to demonstrate how the fitness landscape of strategies becomes intrinsically dynamic due to species-environment feedback. Such dynamic fitness landscapes produce rich behaviors, and prove to be crucial for ecological and evolutionarily stable coexistence in all the models we examined.</p>

Alternate JournalPLoS Comput Biol
PubMed ID32857772
PubMed Central IDPMC7482850
Grant ListDP1 AI124669 / AI / NIAID NIH HHS / United States
R01 GM082938 / GM / NIGMS NIH HHS / United States