Root zone temp. | RGR (g∙g−1∙day−1) | Ratio of plant organ | ||||
Shoot | Tap root | Fibrous root | Shoot/Tap root | Shoot/Fibrous root | Tap root/Fibrous root | |
20˚C | 0.134 ± 0.011 a | 0.218 ± 0.011 a | 0.108 ± 0.014 a | 0.90 ± 0.08 b | 1.12 ± 0.12 b | 0.24 ± 0.04 b |
25˚C | 0.136 ± 0.005 a | 0.200 ± 0.008 ab | 0.124 ± 0.008 a | 1.07 ± 0.08 ab | 1.50 ± 0.17 ab | 0.39 ± 0.06 ab |
29˚C | 0.142 ± 0.008 a | 0.183 ± 0.006 bc | 0.128 ± 0.007 a | 1.39 ± 0.15 a | 2.09 ± 0.26 a | 0.49 ± 0.03 a |
33˚C | 0.087 ± 0.003 b | 0.156 ± 0.009 c | 0.059 ± 0.010 b | 1.07 ± 0.09 ab | 1.40 ± 0.15 ab | 0.29 ± 0.06 b |