Lowering <i>p</i>O₂ Interacts with Photoperiod to Alter Physiological Performance of the Coastal Diatom <i>Thalassiosira pseudonana</i>.

The photosynthetic oxygen evolution rate (Pn) under the 8:16 L:D cycle decreased from 2.72 ± 0.06 to 2.49 ± 0.05 fmol O 2 cell −1 min −1 from ambient p O 2 to hypoxia, while such a decreasing trend did not occur under the 16:8 L:D cycle ( Figure 3 B).

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