Table 1.
Geometrical Parameters Derived from Surface Analysis of State I– and State II–Adapted De-Enveloped Chloroplasts
| Treatment | Chloroplast Height (nm) | Chloroplast Base Area (μm2) | Area of Grana End Membranes (nm2) |
|---|---|---|---|
| Dark adaptation | 754 ± 26 | 33 ± 2 | (207 ± 7) × 103 |
| 640-nm light (+ATP) | 581a ± 27 | 48a ± 2 | (141a ± 4) × 103 |
| Duroquinol (+ATP) | 516a ± 47 | 42a ± 3 | ND |
| 640-nm light (−ATP) | 688 ± 43 | 28 ± 2 | (202 ± 7) × 103 |
Details of the statistical analysis are provided in Methods. Data are shown as the mean ± se. ND, not determined (see text).
a
Values significantly different from those determined for untreated dark-adapted chloroplasts (state I).