Figure 2. Carbon monoxide improves the internal structure of C. reinhardtii chloroplasts under iron deficiency.

Cells were cultured under the condition of sufficient Fe (10 µM) (a and b) and deficient Fe (0.1 µM) (c and d) for 7 days. a: cells supplied with 10 µM Fe; b: cells with 10 µM Fe + 8 µM CO; c: cells with 0.1 µM Fe; and d: cells with 0.1 µM Fe + 8 µM CO. After treatment, the cells were visualized under TEM and photographed. The micrographs were zoomed in to show the thylakoid (as indicated with arrows) inside the chloroplasts.