Fig. 4: Daily patterns of N2 fixation for Epithemia.
From: Overlooked and widespread pennate diatom-diazotroph symbioses in the sea
a Dihydrogen (H2) production, ethylene (C2H4) production from acetylene (C2H2), and 15N2 assimilation for E. pelagica UHM3200. b H2 production, C2H4 production from C2H2, and 15N2 assimilation for E. catenata UHM3210. Sampling resolution was 10 min for H2 and C2H4 production and 2 h for the 15N2 assimilation with the values represented by average ± standard deviation (n = 3). The 15N2 assimilation beginning at 20:30 had rates of 0.1 fmol N cell−1 d−1 for E. pelagica. The night period is represented by gray shading in both plots. Source data are provided in the Source Data file.
