Table 1.
Growth parameters of individual kale leaves grown under the control and UV-B exposure conditions for 2 days before harvest.
| Leaf Order 1 | Leaf Fresh Weight (g) | Leaf Dry Weight (g) | Leaf Area (cm2) | |||
|---|---|---|---|---|---|---|
| Control | +UV-B | Control | +UV-B | Control | +UV-B | |
| 2 | 2.36 ± 1.54 2 | 2.66 ± 0.40 | 0.18 ± 0.11 | 0.21 ± 0.01 | 32.25 ± 9.65 | 45.23 ± 4.16 |
| 3 | 5.15 ± 2.84 | 4.87 ± 1.39 | 0.41 ± 0.26 | 0.38 ± 0.08 | 84.49 ± 49.35 | 87.24 ± 28.17 |
| 4 | 8.31 ± 1.55 | 8.57 ± 0.99 | 0.70 ± 0.20 | 0.82 ± 0.19 | 168.31 ± 34.38 | 155.03 ± 13.80 |
| 5 | 8.97 ± 1.33 | 8.44 ± 1.25 | 0.88 ± 0.14 | 0.86 ± 0.15 | 179.44 ± 16.96 | 186.87 ± 14.14 |
| 6 | 10.17 ± 2.56 | 8.62 ± 0.69 | 0.93 ± 0.33 | 0.89 ± 0.17 | 200.07 ± 36.42 | 178.14 ± 13.40 |
| 7 | 10.12 ± 1.09 | 7.06 ± 1.97 | 0.96 ± 0.21 | 0.79 ± 0.29 | 182.72 ± 19.97 | 147.06 ± 28.89 |
| 8 | 7.40 ± 1.76 | 5.80 ± 1.54 | 0.77 ± 0.21 | 0.66 ± 0.18 | 139.49 ± 17.85 | 115.14 ± 33.49 |
| 9 | 5.38 ± 0.86 | 4.18 ± 1.05 | 0.57 ± 0.09 | 0.50 ± 0.12 | 91.20 ± 1.82 | 64.23 ± 19.42 |
| 10 | 3.59 ± 0.53 | 2.82 ± 0.50 | 0.43 ± 0.08 | 0.37 ± 0.06 | 49.94 ± 6.36 | 37.74 ± 14.75 |
| UV treatment | * 3 | ns | * | |||
| Leaf order | *** | *** | *** | |||
| UV × Leaf order | ns | ns | ns | |||
1 Leaf order indicates the leaf developmental age in order from the oldest leaf at the bottom to the youngest leaf at the top in a whole plant. 2 Data represent mean ± SD (n = 3). 3 Asterisks indicate significant differences following two-way ANOVA and Tukey’s HSD test. *, p < 0.05; ***, p < 0.001; ns, not significant.