Table 1.
Effects of exogenous SA and NO on plant growth of peanut at 21 days treatment
| Treatments | Shoot height (cm/plant) | Root length (cm/plant) | Root volume (mL/plant) | Fresh weight (g/plant) | Root/Shoot ratio |
|---|---|---|---|---|---|
| CK | 28.60 ± 0.66c | 8.53 ± 0.06d | 0.98 ± 0.08d | 6.17 ± 0.08d | 0.18 ± 0.01d |
| EDTA-Fe | 33.90 ± 0.36b | 9.63 ± 0.78d | 1.31 ± 0.01b | 7.05 ± 0.70c | 0.21 ± 0.01c |
| SA | 33.80 ± 0.79b | 11.03 ± 1.23c | 1.17 ± 0.06c | 7.50 ± 0.66bc | 0.22 ± 0.01bc |
| SNP | 34.33 ± 0.46b | 11.67 ± 0.38bc | 1.18 ± 0.07c | 7.90 ± 0.29ab | 0.24 ± 0.01b |
| SA+SNP | 36.77 ± 0.57a | 13.23 ± 0.32a | 1.49 ± 0.05a | 8.29 ± 0.23a | 0.26 ± 0.01a |
| 1/2(SA+SNP) | 34.50 ± 0.46b | 12.73 ± 0.59ab | 1.37 ± 0.08b | 8.16 ± 0.13ab | 0.25 ± 0.01a |
CK: hydroponic systems; EDTA-Fe: Hoagland nutrient solution containing 0.1 mM EDTA-Fe; SA: hydroponic systems and foliar application of 1.0 mM SA; SNP: hydroponic systems and foliar application of 2.5 mM SNP; SA+SNP: hydroponic systems and foliar application of 1.0 mM SA and 2.5 mM SNP; 1/2(SA+SNP): hydroponic systems and foliar application of 0.5 mM SA and 1.25 mM SNP. Different lower case letters in the same line indicate a significant difference (P < 0.05) between different treatments. Data are means ± SD of three replicate samples per treatment.