Table 1.
Effect of drought and salt treatments on plant water status and physiological parameters in N-fed (A) and N-fix (B)M. truncatula.
| Parameter | Control | Drought | Salt |
|---|---|---|---|
| (A) N-FED | |||
| WCshoot | 0.82 ± 0.06 a | 0.78 ± 0.01 b | 0.82 ± 0.01 a |
| Ψleaf (MPa) | −0.68 ± 0.07 a | −1.06 ± 0.08 b | −0.69 ± 0.18 a |
| gs [mmol m−2 s−1] | 381.52 ± 139.02 a | 121.52 ± 30.32 b | 37.01 ± 5.46 c |
| F′q/F′m | 0.55 ± 0.05 a | 0.44 ± 0.07 b | 0.58 ± 0.03 a |
| (B) N-FIX | |||
| WCshoot | 0.89 ± 0.01 a | 0.89 ± 0.01 a | 0.90 ± 0.01 a |
| Ψleaf (MPa) | −0.73 ± 0.10 a | −0.98 ± 0.09 b | −0.75 ± 0.17 a |
| gs [mmol m−2 s−1] | 425.95 ± 156.23 a | 165.71 ± 36.15 b | 36.14 ± 6.40 c |
| F′q/F′m | 0.57 ± 0.02 a | 0.56 ± 0.01 a | 0.58 ± 0.02 a |
Values represent the mean ± SE (n = 3). The letters a, b, and c indicate significant differences between control and stress treatments (Student’s t test p < 0.05). WC, water content; Ψleaf, leaf water potential; gs, stomatal conductance; F′q/F′m, PSII operating efficiency.