Table 1.
Influence of the lighting direction on the growth and development of lettuce grown for 30 days.
| Cultivar (A) | Lighting Direction (B) |
Shoot | Leaf | Root | Shoot/Root Ratio (Fresh Weight) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Height (cm) |
Crown Diameter (mm) | Canopy Diameter (cm) | Fresh Weight (g) | Dry Weight (g) | Number | Length (cm) |
Width (cm) |
Length (cm) |
Fresh Weight (g) | Dry Weight (g) | |||
| “Caesar Green” | Top | 16.0 a z | 7.8 a | 15.7 cd | 19.34 b | 1.28 ab | 21 a | 11.5 c | 6.3 c | 20.3 b | 6.74 a | 0.43 a | 2.96 c |
| Side | 15.4 ab | 7.2 ab | 19.2 ab | 20.50 ab | 1.24 ab | 20 a | 13.2 a-c | 6.9 c | 21.8 b | 5.39 ab | 0.28 b | 4.10 bc | |
| Bottom | 14.2 c | 6.1 b | 19.3 ab | 19.21 b | 1.05 b | 17 b | 14.8 a | 6.3 c | 21.1 b | 3.82 bc | 0.22 bc | 5.72 b | |
| “Polla” | Top | 15.8 ab | 7.2 ab | 15.1 d | 20.39 ab | 1.28 ab | 16 b | 11.8 c | 9.8 a | 26.4 a | 4.83 b | 0.32 ab | 4.59 bc |
| Side | 15.8 ab | 6.5 b | 17.5 bc | 23.57 a | 1.38 a | 16 b | 12.5 bc | 10.0 a | 23.3 ab | 4.23 bc | 0.28 b | 5.82 b | |
| Bottom | 14.9 bc | 6.3 b | 20.0 a | 18.85 b | 1.00 b | 13 c | 13.6 ab | 8.7 b | 23.9 ab | 2.75 c | 0.16 c | 7.48 a | |
| F-test | A | NS y | NS | NS | NS | NS | *** | NS | *** | ** | * | NS | *** |
| B | *** | * | *** | * | NS | *** | *** | * | NS | ** | * | *** | |
| A × B | NS | NS | NS | NS | NS | NS | NS | NS | NS | NS | NS | NS | |
z Mean separation within columns by Duncan’s multiple range test at p ≤ 0.05. y NS, *, **, ***, non-significant or significant at p ≤ 0.05, 0.01, or 0.001, respectively.