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Photosystem‐ II shutdown evolved with N itrogen fixation in the unicellular diazotroph C rocosphaera watsoniiNARA Subscribed
Summary Protection of nitrogenase from oxygen in unicellular Cyanobacteria is obtained by temporal separation of photosynthesis and diazotrophy through transcriptional and translational regulations of nitrogenase. But diazotrophs can face environmental situations in which N 2 fixation occurs significantly in the light, and we believe that another control operates to make it possible. The night‐time shutdown of PSII activity is...
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