Table 1.
The complementary quantum yields of energy conversion in PSI and PSII after exposure to various concentrations of Hg2+ for 24 h. Data were detected after the last procedure of illumination at the highest intensity (1601 μmol m−2 s−1) during the light response reaction. Data are means ± S.E. (n= 3), and data followed by different letters in the same column are significantly different (p < 0.05, ANOVA, Duncan’s test).
| Hg2+ Concentration (mg/L) | Quantum Yields in PSI | Quantum Yields in PSII | ||||
|---|---|---|---|---|---|---|
| Y(I) | Y(ND) | Y(NA) | Y(II) | Y(NO) | Y(NPQ) | |
| 0 | 0.467 ± 0.014 a | 0.342 ± 0.035 b | 0.178 ± 0.037 a | 0.270 ± 0.008 a | 0.653 ± 0.001 c | 0.040 ± 0.014 c |
| 0.05 | 0.330 ± 0.040 b | 0.670 ± 0.050 a | 0.040 ± 0.024 b | 0.240 ± 0.001 b | 0.790 ± 0.029 a | 0.023 ± 0.009 c |
| 0.5 | 0.338 ± 0.021 b | 0.660 ± 0.039 a | 0.027 ± 0.019 b | 0.176 ± 0.002 c | 0.740 ± 0.004 ab | 0.086 ± 0.003 b |
| 1 | 0.384 ± 0.009 b | 0.603 ± 0.037 a | 0.035 ± 0.022 b | 0.175 ± 0.005 c | 0.693 ± 0.005 b | 0.137 ± 0.005 a |