Table 1.
Effects of melatonin application on growth attributes of soybean plants 3 and 7 days after heat stress.
| Treatment | SL | RL | FW | DW | CHL (SPAD) |
|---|---|---|---|---|---|
| 3 Days | |||||
| Control | 15.7 ± 0.3 b | 14.4 ± 0.3 b | 2.1 ± 0.1 b | 1.8 ± 0.1 b | 37.3 ± 0.2 b |
| MT | 17.2 ± 0.5 a | 16.7 ± 0.6 a | 2.8 ± 0.1 a | 2.1 ± 0.06 a | 39.8 ± 0.2 a |
| HS | 13.1 ± 0.6 c | 13.3 ± 0.5 c | 1.4 ± 0.06 c | 1.02 ± 0.1 d | 34.4 ± 0.6 c |
| MT/SH | 15.2 ± 0.2 b | 14.1 ± 0.4 b | 2.0 ± 0.09 b | 1.5 ± 0.1 c | 37.1 ± 0.2 b |
| 7 Days | |||||
| Control | 18.2 ± 0.2 ab | 17.6 ± 0.2 b | 2.9 ± 0.06 b | 2.2 ± 0.2 b | 39.3 ± 0.5 b |
| MT | 19.8 ± 0.5 a | 21.7 ± 0.6 a | 3.4 ± 0.1 a | 2.7 ± 0.05 a | 41.7 ± 0.9 a |
| HS | 14.4 ± 0.2 c | 14.1 ± 0.3 c | 1.7 ± 0.09 d | 1.1 ± 0.03 d | 28.9 ± 0.8 d |
| MT/SH | 16.8 ± 0.2 b | 16.9 ± 0.3 b | 2.2 ± 0.08 c | 1.7 ± 0.08 c | 34.8 ± 0.5 c |
The treatment includes control (without any treatment or stress), MT (Melatonin treated), HS (High temperature 42 °C), MT/HS (Melatonin + High temperature 42 °C), while the measurement includes SL (Shoot length), RL (Root length), FW (Fresh weight), DW (Dry weight) and Chl (Chlorophyll content). Each data point is the mean of at least three replicates. The mean (± SE) followed by the different letter (s) are significantly different from each other as evaluated by DMRT.