Transmission electron microscopy of plastids in leaf three of CPD -antisense and cbb1 plants. Plants were grown and harvested as described in Figure 1 at the middle of the light period. A, Wild type (C24) at day 3. B, CPD-antisense at day 3. C, cbb1 at day 3. D, C24 at day 6. E, CPD-antisense at day 6. F, cbb1 at day 6. Subcellular structures are exemplarily indicated in A; cw, cell wall; g, granum (stack of thylakoids); s, starch granule; bar: 1 μm.