Time taken for root tips to brown and for the resumption of root tip growth and shoot initiation after heat treatment and heat treatment plus immediate decapitation. Number of replicates (N) = 10 for all treatments. Different letters in a column denote significant difference for all treatment data (P < 0.05).
| Treatment | Time taken for browning of root tips (days) | Time taken for resumption of root tip growth (days) | Time taken for shoot initiation (days) |
|---|---|---|---|
| Control | No browning | n/a | n/a |
| 40 °C for 2 minutes | 2-5 | 12-14b | 14-16a |
| 40 °C for 2 minutes and decapitation | No effect | Immediate | 5-8b |
| 60 °C for 2 minutes | 2-3 | 3-4a | 4b |
| 60 °C for 2 minutes and decapitation | No effect | Immediate | 3b |
| 60 °C for 4 minutes | 2-4 | 8-12b | 14-21a |
| 60 °C for 4 minutes and decapitation | No effect | 1-3a | 5-10b |
| 60 °C for 8 minutes | 2-4 | 10-13b | 14-22a |
| 60 °C for 8 minutes and decapitation | 2-3 | 3-5a | 8-12b |
| 80 °C for 2 minutes | 2-3 | 12-15b | 14-17a |
| 80 °C for 2 minutes and decapitation | 2-3 | 6-10ab | 8-11b |