Table 1.
Growth and morphology of chrysanthemum cuttings exposed for 30 days to different light quality regimes (red (R), red and blue (R:B), red, blue and far-red (R:B:FR), white (W) and blue (B); see the spectrum in Figure 9). During the experiment, the photosynthetic photon flux density was set to 150 ± 5 µmol m−2 s−1. Six replicates per treatment were assessed. Means within a column followed by the same letters are not significantly different at p ≤ 0.05, according to Duncan′s multiple range tests. CV % indicates the percentages of coefficient of variation among the treatments.
| Spectrum | Cutting | Leaf | Shoot | Root | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Survival (%) |
Number (Plant−1) |
Area (cm2 Leaf−1) |
Area (cm2 Plant−1) |
Fresh Weight (g) |
Dry Weight (g) |
Length (cm) |
Fresh Weight (g) |
Dry Weight (g) |
Length (cm) |
|
| R | 100 | 13.16 a | 3.48 c | 45.77 d | 7.04 c | 1.07 c | 15.12 ab | 0.54 b | 0.061 a | 4.04 a |
| R:B | 100 | 11.16 b | 8.58 a | 94.81 a | 9.80 b | 1.41 b | 13.61 bc | 0.77 a | 0.066 a | 5.01 a |
| R:B:FR | 100 | 11.17 b | 8.01 a | 88.71 ab | 9.40 b | 1.43 b | 16.31 a | 0.5 bc | 0.043 b | 4.38 a |
| W | 100 | 9.33 c | 7.65 ab | 70.67 c | 8.36 bc | 1.14 c | 13.41 bc | 0.43 bc | 0.03 b | 2.25 b |
| B | 100 | 12.16 ab | 6.93 b | 83.89 b | 11.79 a | 1.95 a | 12.12 c | 0.35 c | 0.04 b | 2.35 b |
| CV% | 0 | 10.62 | 12.17 | 7.8 | 17.1 | 14.91 | 11.83 | 27.12 | 27.91 | 27.25 |
| P | - | 0.0002 | ≤0.0001 | ≤0.0001 | 0.0004 | ≤0.0001 | 0.0022 | 0.0004 | 0.0003 | ≤0.0001 |