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Complementary cooperation between two syntrophic bacteria in pesticide degradationResearch Collaboration Agreement • February 11th, 2023
Interactions between microbial species, including competition and mutu- alism, influence the abundance and distribution of the related species. For example, metabolic cooperation among multiple bacteria plays a major role in the maintenance of consortia. This study aims to clarify how two bacterial species coexist in a syntrophic association involving the degradation of the pesticide fenitrothion. To elucidate essential mechanisms for maintaining a syntrophic association, we employed a mathematical model based on an ex- perimental study, because experiment cannot elucidate various conditions for two bacterial coexistence. We isolated fenitrothion-degrading Sphingomonas sp. TFEE and its metabolite of 3-methyl-4-nitrophenol (3M4N)-degrading Burkholderia sp. MN1 from a fenitrothion-treated soil microcosm. Neither bacterium can completely degrade fenitrothion alone, but they can utilize the second intermediate, methylhydroquinone (MHQ). Burkholderia sp. MN1 excretes a portion of MHQ during
