Fig. 1
Rooting and initial growth of shoots on two-node cuttings of Rosa ‘Konstancin’ in response to the quality of LED light and the intensity of irradiation in the growth chamber
| LED light treatment PPFD (μmol·m−2·s−1) | Rooting (%) | Number of roots per cutting | Root length (mm) | Fresh weight of roots (mg) | Cuttings with new shoots (%) | Shoot length (mm) | Fresh weight of shoot (mg) |
|---|---|---|---|---|---|---|---|
| White 50 – control | 83.3±3.6 a | 3.3±0.41 a | 50±0.7 a | 79.3±17.1 a | 26.7±3.6 a | 15.7±3.7 a | 274±22 a |
| White 100 | 93.3±2.4 a | 3.9±0.57 a | 51±3.4 a | 89.6±15.7 a | 43.3± 7.2 a | 25.3±3.0 b | 368±44 ab |
| White 50 + Red 50 | 89.7±0.8 a | 3.2±0.48 a | 48±4.7 a | 183.0±27.9 b | 66.7±3.6 b | 23.2±2.6 b | 486±21 b |
| White 50 + Blue 50 | 86.7±1.9 a | 2.7±0.34 a | 44±4.2 a | 124.5±27.4 ab | 39.2±6.6 a | 22.2±2.8 b | 354±25 ab |
Rooting and initial growth of shoots on two-node cuttings of Rosa ‘Konstancin’ in response to the quality of LED additional lighting in the greenhouse
| LED light treatment PPFD (μmol·m−2·s−1) | Rooting (%) | Number of roots per cutting | Root length (mm) | Fresh weight of roots (mg) | Cuttings with new shoots (%) | Shoot length (mm) | Fresh weight of shoot (mg) |
|---|---|---|---|---|---|---|---|
| Natural – control | 61.7±3.2 a | 3.6±0.35 a | 55±3.8 a | 51.9±5.8 a | 21.7±2.1 a | 5.8±0.8 a | 86±12 a |
| White 120 | 67.5±2.8 a | 5.0±0.45 a | 67±5.0 a | 63.3±9.6 ab | 38.3±6.2 a | 7.4±1.1 a | 120±13 a |
| Red 120 | 61.7±6.1 a | 4.9±0.45 a | 72±5.0 a | 88.7±12.2 b | 63.4±4.5 b | 8.4±1.4 a | 100±12 a |
| Blue 120 | 65.0±4.0 a | 4.3±0.45 a | 65±6.1 a | 72.3±8.3 ab | 30.0±5.3 a | 5.6±0.7 a | 118±22 a |