Fig. 5: Photosynthetic O2 evolution, growth rates, and mitochondrial respiration rates of the diatom Thalassiosira weissflogii grown and measured under four different pO2/pCO2 combinations.

(a) Net photosynthetic rates, (b) specific growth rates (μ), and (c) mitochondrial respiration rates of the cells grown and measured under ambient (AO, ~255 μM) and low O2 levels (LO, ~57 μM) with ambient (AC, ~15 μM) and elevated CO2 levels (HC, ~35 μM). The values are the means and the error bars represent standard deviations of independent biological replicates (n = 3 independent cultures). Light-colored symbols are individual data corresponding to the treatments. Different letters above the bars represent significant differences (P < 0.05, LSD test) among treatments. Detailed information for the experimental features and timing points for the above determinations are shown in Supplementary Fig. 3.