Table 3.
Effect of lighting type and time of measurement on the value of the chlorophyll a fluorescence parameters and SPAD in old leaves.
| Parameter | Time of Measurement | Lighting Type | ||
|---|---|---|---|---|
| HPS | HPS + LED | LED | ||
| SPAD | November | 46.42 ab * | 45.50 b | 46.88 ab |
| December | 44.93 bc | 40.82 c | 43.47 bc | |
| March | 44.18 bc | 48.83 a | 53.92 a | |
| Fs | November | 409.83 b | 510.33 ab | 553.33 ab |
| December | 461.83 b | 517.00 ab | 502.17 b | |
| March | 285.00 b | 426.67 ab | 386.00 ab | |
| Fm’ | November | 1987.00 b | 2240.17 a | 2340.00 a |
| December | 2158.50 ab | 2230.67 a | 2292.33 a | |
| March | 1567.33 c | 2017.33 ab | 2061.50 ab | |
| PSII | November | 0.772 ab | 0.794 a | 0.763 ab |
| December | 0.770 ab | 0.784 a | 0.779 a | |
| March | 0.790 a | 0.811 a | 0.766 ab | |
| Fv/Fm | November | 0.836 a | 0.830 a | 0.825 a |
| December | 0.835 a | 0.833 a | 0.832 a | |
| March | 0.829 a | 0.829 a | 0.827 a | |
| PI | November | 6.06 b | 6.51 ab | 7.38 a |
| December | 6.05 b | 5.43 b | 5.85 b | |
| March | 5.87 b | 6.88 ab | 7.54 a | |
* Different lowercase letters indicate a significant difference at p < 0.05 using Tukey’s test.