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Transmission electron micrographs showing leaf ultrastructure of Impatiens New Guinea grown under two CO2 concentrations: ambient CO2 (a, c, e, 380 μmol·mol−1) and elevated CO2 (b, d, f, 760 μmol·mol−1). s: starch; ch: chloroplast; g: grana; gt: grana thylakoid; st: stroma thylakoids; p: plastoglobuli. Bars: 5 μm (a and b); 2 μm (c and d); 0.5 μm (e and f).
