Modeling dynamic oxygen permeability as a mechanism to mitigate oxygen-induced stresses on photosynthesis and N<sub>2</sub> fixation in marine <i>Trichodesmium</i>.
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ABSTRACT: Trichodesmium, the predominant marine diazotrophic cyanobacterium, concurrently performs nitrogen (N2) fixation and photosynthesis, the latter of which produces oxygen (O2) that inhibits N2 fixation. Hopanoid lipids in Trichodesmium may play a role in dynamically regulating membrane permeability to O2, potentially alleviating O2 stress on N2 fixation. However, the physiological impacts of this dynamic permeability are not well understood. We developed a model showing that dynamically modulating membrane O2 permeability can enhance N2 fixation and growth of Trichodesmium by over 50%. High O2 permeability (1.5 × 10-4 of O2 diffusivity in seawater) duri
SUBMITTER: Luo W
PROVIDER: S-EPMC12502677 | biostudies-literature | 2025 Oct
REPOSITORIES: biostudies-literature
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