Table 5.
Root length (mm) of two wheat genotypes after 5 days of growth under control (C), drought treatments (15%, 20% and 30% PEG), salt treatments (90, 160 and 230 mM NaCl), high voltage electrical discharge (HVED) pretreatment (P) and combined (P-15% PEG, P-20% PEG, P-30% PEG, P-90 mM NaCl, P-160 mM NaCl and P-230 mM NaCl) treatments. Values are means of three repetitions (10 plants/repetition) ± S.D. The different capital letters indicate significances among means of different treatments within the same genotype, while lowercase letters indicate significances among means between genotypes under the same treatment at p < 0.05 using LSD post-hoc test.
| Drought | Salt Treatment | ||||
|---|---|---|---|---|---|
| Bernarda | Tena | Bernarda | Tena | ||
| C | 100.64 ± 0.9 aB | 99.50 ± 0.5 bA | C | 100.73 ± 1.0 bB | 100.60 ± 1.5 bA |
| 15% PEG | 77.60 ± 0.7 cD | 77.50 ± 0.9 cD | 90 mM NaCl | 46.00 ± 0.6 cD | 35.40 ± 0.8 dC |
| 20% PEG | 67.36 ± 1.1 bE | 66.10 ± 0.9 bD | 160 mM NaCl | 0.00 ± 0.0 cF | 0.00 ± 0.0 cF |
| 30% PEG | 46.75 ± 0.7 cG | 58.50 ± 0.9 aF | 230 mM NaCl | 0.00 ± 0.0 bF | 0.00 ± 0.0 bF |
| P | 110.10 ± 0.7 aA | 99.50 ± 0.8 bA | P | 109.30 ± 1.2 aA | 100.90 ± 1.3 bA |
| P-15% PEG | 99.20 ± 0.8 aBC | 80.60 ± 0.6 bB | P-90 mM NaCl | 63.20 ± 0.8 aC | 49.70 ± 0.7 bB |
| P-20% PEG | 97.40 ± 0.5 aC | 60.90 ± 0.7 cE | P-160 mM NaCl | 30.00 ± 0.8 aE | 28.10 ± 0.9 bD |
| P-30% PEG | 59.90 ± 0.5 aF | 54.10 ± 0.7 bG | P-230 mM NaCl | 0.00 ± 0.0 bF | 3.30 ± 0.1 aE |