Figure 2
From: Nitrogen fixation and transfer in open ocean diatom–cyanobacterial symbioses
The images of 15N/14N ratios are shown for symbiont-containing Hemiaulus. The 15N/14N ratio is shown for Hemiaulus–Richelia symbioses at time 0 (a), 30 min (b) and 48 h (c). Inset panels a–c are the epi-fluorescent images taken before the nanoSIMS analyses. The numbers and markings in the figure define regions of interest, which were used for calculating 15N/14N ratios. Scale bars are 5 μm.
