Table 2.
Shoot and root ion contents measured during stress application at T2, T4, and T10 and after 4 days of recovery (T14) in wild-type (B73) and hybrid (P26) plants.
| Shoot (S) [mg g−1] | Root (R) [mg g−1] | Na+ | Cl− | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Na+ | K+ | NH+4 | Mg2+ | Ca2+ | Cl− | PO3−4 | SO2−4 | Na+ | K+ | NH+4 | Mg2+ | Ca2+ | Cl− | PO3−4 | SO2−4 | S/R | S/R | |||||||||||||||||||
| VARIETY | ||||||||||||||||||||||||||||||||||||
| Wild | 8.02 | a | 12.73 | ns | 1.65 | ns | 4.96 | a | 9.23 | a | 16.36 | a | 1.00 | ns | 0.70 | a | 7.89 | b | 5.01 | ns | 0.88 | ns | 2.53 | ns | 6.93 | ns | 6.80 | ns | 0.61 | ns | 3.27 | ns | 1.29 | a | 5.94 | a |
| Hybrid | 5.53 | b | 13.40 | ns | 1.73 | ns | 3.65 | b | 6.62 | b | 7.11 | b | 0.74 | ns | 0.31 | b | 10.32 | a | 5.12 | ns | 0.85 | ns | 2.32 | ns | 7.54 | ns | 7.15 | ns | 0.49 | ns | 3.54 | ns | 0.57 | b | 1.43 | b |
| WATER SALINITY | ||||||||||||||||||||||||||||||||||||
| No salt | 3.62 | b | 12.32 | ns | 1.31 | b | 4.06 | b | 7.59 | b | 5.85 | b | 0.89 | ns | 0.40 | ns | 6.82 | b | 5.75 | a | 0.95 | ns | 2.41 | ns | 7.31 | ns | 3.78 | b | 0.55 | ns | 3.20 | ns | 0.57 | b | 1.75 | b |
| Salt | 9.93 | a | 13.82 | ns | 2.07 | a | 4.55 | a | 8.26 | a | 17.62 | a | 0.84 | ns | 0.61 | ns | 11.40 | a | 4.38 | b | 0.78 | ns | 2.43 | ns | 7.16 | ns | 10.17 | a | 0.55 | ns | 3.61 | ns | 1.29 | a | 5.61 | a |
| SOIL WATER CONTENT | ||||||||||||||||||||||||||||||||||||
| 60% | 5.56 | b | 11.81 | b | 1.60 | ns | 4.12 | ns | 7.51 | b | 10.17 | b | 0.78 | ns | 0.45 | ns | 8.44 | b | 4.84 | ns | 0.86 | ns | 2.27 | b | 7.20 | ns | 6.66 | ns | 0.48 | ns | 2.97 | b | 0.88 | ns | 2.80 | ns |
| 100% | 7.99 | a | 14.33 | a | 1.78 | ns | 4.49 | ns | 8.35 | a | 13.30 | a | 0.96 | ns | 0.57 | ns | 9.77 | a | 5.29 | ns | 0.87 | ns | 2.57 | a | 7.27 | ns | 7.29 | ns | 0.62 | ns | 3.83 | a | 0.98 | ns | 4.57 | ns |
| DAY | ||||||||||||||||||||||||||||||||||||
| 2 | 4.15 | b | 15.55 | a | 1.78 | ns | 4.40 | b | 8.50 | b | 7.69 | b | 1.12 | ab | 0.66 | a | 7.97 | c | 6.53 | a | 1.04 | ns | 2.58 | a | 7.08 | b | 7.70 | ab | 0.80 | a | 4.60 | a | 0.57 | b | 1.44 | b |
| 4 | 5.36 | b | 15.58 | a | 1.83 | ns | 2.83 | c | 4.03 | c | 11.44 | b | 0.55 | b | 0.27 | b | 9.97 | b | 5.87 | a | 0.96 | ns | 2.70 | a | 8.01 | ab | 7.41 | b | 0.46 | ab | 3.75 | a | 0.57 | b | 1.93 | b |
| 10 | 9.72 | a | 12.01 | b | 1.60 | ns | 5.69 | a | 10.19 | a | 17.33 | a | 1.22 | ab | 0.77 | a | 11.67 | a | 4.51 | b | 0.72 | ns | 2.75 | a | 8.43 | a | 9.69 | a | 0.60 | ab | 3.60 | a | 0.78 | b | 1.70 | b |
| 14 | 7.87 | a | 9.12 | b | 1.53 | ns | 4.29 | b | 9.00 | b | 10.49 | b | 0.59 | ab | 0.33 | b | 6.82 | c | 3.36 | b | 0.74 | ns | 1.65 | b | 5.42 | c | 3.10 | c | 0.33 | b | 1.66 | b | 1.80 | a | 9.67 | a |
a Values reported in columns represent for each factor the mean of different treatments. Means within each factor followed by different letters are significantly different (P < 0.05) according to Tukey's test.