Table 2 The effect of Red, Blue, Fluorescent light, and combined LEDs of red and blue light [RB (1:1, 8:2, and 2:8) respectively] on stomata and trichome characters in Digitalis purpurea L., under a closed type plant factory. The data represents mean ± standard error. Data for each column followed by the different alphabets are significantly different according to Duncan’s multiple range test at p < 0.05.
LED treatment | Density of stomata (no. of stomata/mm2) | Length of stomata | Width of stomata | Length-to-width ratio of stomata | Density of trichome (no. of stomata mm−2) | Length of trichome | Width of trichome |
|---|---|---|---|---|---|---|---|
R | 24.80 ± 2.84ab | 17.40 ± 2.30a | 11.65 ± 0.49b | 1.51 ± 0.26a | 12.90 ± 0.68b | 363.00 ± 24.58b | 37.93 ± 0.81a |
B | 23.50 ± 2.59ab | 16.90 ± 3.98a | 13.17 ± 1.09b | 1.25 ± 0.20a | 9.55 ± 0.33c | 361.00 ± 37.58b | 41.30 ± 5.11a |
FL | 41.04 ± 10.74a | 16.47 ± 3.75a | 9.07 ± 2.11b | 2.28 ± 1.03a | 7.40 ± 0.36d | 343.33 ± 33.65b | 44.03 ± 2.26a |
RB (1:1) | 21.73 ± 1.68b | 18.43 ± 4.56a | 12.73 ± 2.17b | 1.67 ± 0.67a | 16.00 ± 1.04a | 360.67 ± 44.73b | 35.87 ± 5.76a |
RB (8:2) | 26.07 ± 2.28ab | 16.63 ± 1.01a | 18.83 ± 0.66a | 0.89 ± 0.08a | 11.70 ± 0.35b | 565.33 ± 25.30a | 46.30 ± 1.90a |
RB (2:8) | 25.58 ± 5.55ab | 15.40 ± 1.44a | 12.13 ± 1.76b | 1.29 ± 0.07a | 17.40 ± 0.62a | 307.00 ± 20.88b | 38.57 ± 5.06a |
