Table 3. Nitrogen concentration in the aboveground (total and separately for each botanical fraction) and root biomasses, and total N uptake in durum wheat grown under no- and saline-stress regimes and in the presence or absence of arbuscular mycorrhizal symbiosis.
+AM = inoculation with arbuscular mycorrhizal spores;–AM, suppression of arbuscular mycorrhizal symbiosis.
| Trait | No-stress | Saline-stress | Significance | |||||
|---|---|---|---|---|---|---|---|---|
| +AM | –AM | +AM | –AM | Stress | Inoc. | Stress × Inoc. | ||
| N concentration of: | ||||||||
| Total aboveground biomass | g kg–1 | 30.9 | 26.5 | 36.5 | 33.1 | ***˟ | *** | ns |
| Green leaves | g kg–1 | 38.5 | 34.3 | 40.9 | 38.9 | *** | *** | * |
| Senescent and dry leaves | g kg–1 | 20.4 | 20.9 | 33.8 | 35.9 | *** | ns | ns |
| Stems | g kg–1 | 25.1 | 21.2 | 27.4 | 23.2 | * | *** | ns |
| Root biomass | g kg–1 | 12.4 | 12.2 | 14.3 | 15.0 | ** | ns | ns |
| Total N uptake | mg N per pot | 95.1 | 82.6 | 68.5 | 56.3 | *** | *** | ns |
˟***, **, * denote significant differences at 0.001, 0.01, and 0.05 probability levels, respectively; ns denotes differences not significant.