N₂ Fixation in Trichodesmium Does Not Require Spatial Segregation from Photosynthesis.

ABSTRACT: The dominant marine filamentous N₂ fixer, Trichodesmium, conducts photosynthesis and N₂ fixation during the daytime. Because N₂ fixation is sensitive to O₂, some previous studies suggested that spatial segregation of N₂ fixation and photosynthesis is essential in Trichodesmium. However, this hypothesis conflicts with some observations where all the cells contain both photosystems and the N₂-fixing enzyme nitrogenase. Here, we construct a systematic model simulating Trichodesmium metabolism, showing that the hypothetical spatial segregation is probably useless in increasing the Trichodesmium growth and N₂ fixation, unless substances can efficiently transfer among cells with low loss to t

SUBMITTER: Luo W 

PROVIDER: S-EPMC9426587 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature