Table 2.
Leaf photosynthesis (A), stomatal conductance (gs), transpiration rate (E) and photosynthetic pigments at 4 or 10 days after treatment (DAT) (n = 4).
| Treatment | DAT | A (μmol CO2 m-2 s-1) | gs (mol H2O m-2 s-1) | E (mmol H2O m-2 s-1) | Chl a (mg g-1 FW) | Chl b (mg g-1 FW) | Chl (a+b) (mg g-1 FW) |
|---|---|---|---|---|---|---|---|
| Basal Zn | 4 | 11.38±0.35a | 0.06±0.021b | 1.99±0.57bc | 1.08±0.09 | 0.31±0.06 | 0.21±0.01 |
| Excess Zn | 4 | 8.80±0.25b | 0.06±0.005b | 1.79±0.18c | 1.34±0.01 | 0.37±0.08 | 0.26±0.04 |
| Excess Zn + ABA | 4 | 7.98±1.25bc | 0.05±0.002bc | 1.65±0.06cd | 0.79±0.11 | 0.20±0.06 | 0.18±0.04 |
| Excess Zn + AM1 | 4 | 4.23±0.55f | 0.04±0.001bc | 1.47±0.03cd | 0.90±0.16 | 0.27±0.10 | 0.20±0.01 |
| Basal Zn | 10 | 7.28±0.36c | 0.06±0.001b | 1.93±0.01bc | 1.31±0.10 | 0.35±0.01 | 0.28±0.04 |
| Excess Zn | 10 | 6.19±0.65d | 0.11±0.038a | 2.97±0.94a | 1.12±0.13 | 0.31±0.08 | 0.24±0.05 |
| Excess Zn + ABA | 10 | 5.21±0.37e | 0.09±0.035a | 2.67±0.89ab | 1.05±0.10 | 0.31±0.03 | 0.24±0.03 |
| Excess Zn + AM1 | 10 | 5.91±0.36de | 0.03±0.004c | 1.04±0.15d | 1.10±0.16 | 0.34±0.05 | 0.24±0.02 |
| Two-way ANOVA | |||||||
| P-value Tr | ∗∗ | ∗∗ | ∗∗ | ns | ns | ns | |
| P-value Ti | ∗∗∗∗ | ns | ∗∗∗ | ∗ | ns | ∗ | |
| P-value TrxTi | ∗∗∗ | ∗∗ | ∗ | ns | ns | ns |
Two ways ANOVA was performed and the P-values of the effects of Zn treatments (Tr), time of sampling (Ti), and their interaction (TrxTi) are indicated: ∗P < 0.05; ∗∗P < 0.01; ∗∗∗P < 0.001; ∗∗∗∗P < 0.0001; ns, P > 0.05. Different letters indicate different averages based on LSD post hoc test.