Diurnally dynamic iron allocation promotes N₂ fixation in marine dominant diazotroph Trichodesmium.

ABSTRACT: Trichodesmium is the dominant photoautotrophic dinitrogen (N₂) fixer (diazotroph) in the ocean. Iron is an important factor limiting growth of marine diazotrophs including Trichodesmium mainly because of high iron content of its N₂-fixing enzyme, nitrogenase. However, it still lacks a quantitative understanding of how dynamic iron allocation among physiological processes acts to regulate growth and N₂ fixation in Trichodesmium. Here, we constructed a model of Trichodesmium trichome in which intracellular iron could be dynamically re-allocated in photosystems and nitrogenase during the daytime. The results demonstrate that the dynamic iron allocation enhances modeled N₂ fixation and growth rates of Trichodesmium,

SUBMITTER: Luo W 

PROVIDER: S-EPMC10362294 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature