Table 2.
Effects of SNP on total chlorophyll (total Chl), maximum photochemical efficiency of PS II (Fv/Fm), qP and NPQ in wheat seedlings exposed to exposed to ZnONPs phytotoxicity.
| Treatments | Total chlorophyll(mg g-1 fresh weight) | Fv/Fm | qP | NPQ |
|---|---|---|---|---|
| ZnONP (μM) | ||||
| 0 | 1.74 ± 0.028ab | 0.855 ± 0.009bc | 0.760 ± 0.011a | 1.34 ± 0.012f |
| 100 | 1.45 ± 0.024d | 0.786 ± 0.009e | 0.675 ± 0.010bc | 1.98 ± 0.017b |
| 200 | 1.25 ± 0.020de | 0.653 ± 0.007f | 0.523 ± 0.008d | 2.43 ± 0.021a |
| ZnO NP (μM)+SNP (100 μM) | ||||
| 0 | 1.88 ± 0.031a | 0.981 ± 0.011a | 0.753 ± 0.011a | 1.45 ± 0.013e |
| 100 | 1.63 ± 0.027b | 0.849 ± 0.010b | 0.714 ± 0.010b | 1.63 ± 0.014d |
| 200 | 1.53 ± 0.025bc | 0.839 ± 0.010cd | 0.689 ± 0.010bc | 1.87 ± 0.016bc |
Data are means ± standard error of six replicates (n = 6). Values followed by different letters within the same column are significantly different at P < 0.05 significance level according to the Duncan’s multiple ranges test.