Table 2.
Effect of lighting type and time of measurement on the value of the chlorophyll a fluorescence parameters and SPAD in young leaves.
| Parameter | Time of Measurement | Lighting Type | ||
|---|---|---|---|---|
| HPS | HPS + LED | LED | ||
| SPAD | November | 39.33 b * | 35.97 c | 46.05 a |
| December | 37.63 c | 43.03 ab | 43.47 ab | |
| March | 42.35 ab | 49.38 a | 48.83 a | |
| Fs | November | 462.50 ab | 590.50 a | 617.33 a |
| December | 499.00 b | 482.17 b | 642.33 a | |
| March | 418.50 ab | 491.50 a | 462.17 a | |
| Fm’ | November | 2271.83 a | 2315.00 a | 2017.17 ab |
| December | 2079.83 ab | 2077.33 ab | 2346.83 a | |
| March | 1919.33 b | 1827.83 b | 1878.00 b | |
| PSII | November | 0.681 b | 0.743 a | 0.793 a |
| December | 0.722 b | 0.765 ab | 0.760 a | |
| March | 0.740 a | 0.767 a | 0.753 a | |
| Fv/Fm | November | 0.822 a | 0.810 ab | 0.797 b |
| December | 0.829 a | 0.824 a | 0.822 a | |
| March | 0.818 ab | 0.822 a | 0.815 ab | |
| PI | November | 3.71 c | 4.02 b | 3.93 c |
| December | 4.03 b | 4.08 b | 4.23 b | |
| March | 5.68 ab | 5.87 ab | 7.18 a | |
* Different lowercase letters indicate a significant difference at p < 0.05 using Tukey’s test.