Root zone temp. | Leaf number | Shoot length (cm) | Total root length (cm) | Tap root diameter (mm) |
20˚C | 7.6 ± 0.2 a | 34.5 ± 1.1 a | 61.7 ± 6.3 a | 16.8 ± 1.5 a |
25˚C | 7.8 ± 0.2 a | 32.1 ± 1.1 ab | 65.2 ± 3.4 a | 14.2 ± 1.3 ab |
29˚C | 7.6 ± 0.2 a | 34.7 ± 0.9 a | 67.4 ± 4.2 a | 11.6 ± 0.7 bc |
33˚C | 6.4 ± 0.2 b | 29.2 ± 0.6 b | 42.1 ± 2.3 b | 7.8 ± 0.6 c |