| ZnCl2 conc, mM | Total chlorophylls, µg g−1 fr wt | Carotenoids, µg g−1 fr wt | ALA content, nmoles g−1 fr wt |
| 0.0 | 207 ± 8 (100) | 23.3 ± 2.4 (100) | 234 ± 13 (100) |
| 0.001 | 206 ± 13 (100) | 21.4 ± 2.7 (93) | 235 ± 11 (100) |
| 0.01 | 211 ± 13 (102) | 24.3 ± 1.8 (104) | 260 ± 18 (111) |
| 0.1 | 196 ± 12.2 (95) | 20.5 ± 1.8 (93) | 259 ± 18 (111) |
| 1 | 240 ± 12 (116) | 29.0 ± 1.7 (126) | 352 ± 70 (150) |
| 2 | 229 ± 16 (111) | 26.8 ± 3.8 (117) | 312 ± 13* (133) |
| 5 | 270 ± 19 (131) | 35.9 ± 1.7** (157) | 351 ± 16** (150) |