Table 4.
Leaf content of chlorophylls, carotenoids, total phenols, and antioxidant capacity (FRAP index) determined at 35 and 53 DAT in lettuce plants non-inoculated or inoculated with the arbuscular mycorrhizal fungus Funneliformis mosseae and grown hydroponically with different P concentration in the nutrient solution (LPC = Low Phosphorus Control; HPC = High Phosphorus Control; LPM = Low Phosphorus Mycorrhizal).
| Sampling Time (DAT) | Treatment | Chlorophylls (μg g−1 FW) | Carotenoids (μg g−1 FW) |
Total Phenols (mg GAE g−1 FW) | FRAP (μmol Fe(II) g−1 FW) |
|---|---|---|---|---|---|
| 35 | LPC | 627.25 ± 14.60 | 95.14 ± 5.58 | 2.82 ± 0.23 | 15.95 ± 0.96 |
| 35 | HPC | 608.80 ± 38.77 | 95.18 ± 7.80 | 2.65 ± 0.19 | 16.07 ± 1.25 |
| 35 | LPM | 845.55 ± 40.26 | 131.32 ± 2.89 | 3.49 ± 0.09 | 21.32 ± 1.51 |
| 53 | LPC | 593.57 ± 46.04 | 91.95 ± 4.81 | 2.16 ± 0.08 | 16.90 ± 0.69 |
| 53 | HPC | 663.04 ± 24.06 | 93.68 ± 4.37 | 2.08 ± 0.26 | 14.15 ± 1.55 |
| 53 | LPM | 888.93 ± 49.48 | 126.00 ± 6.59 | 2.98 ± 0.17 | 20.97 ± 1.20 |
| MAIN EFFECT | |||||
| 35 | 693.87 ± 36.80 a | 107.21 ± 5.96 a | 2.99 ± 0.14 a | 17.78 ± 1.00 a | |
| 53 | 715.18 ± 43.74 a | 103.88 ± 5.48 a | 2.41 ± 0.14 b | 17.34 ± 1.05 a | |
| LPC | 610.41 ± 23.25 b | 93.55 ± 3.46 b | 2.49 ± 0.17 b | 16.42 ± 0.58 b | |
| HPC | 635.92 ± 23.48 b | 94.43 ± 4.15 b | 2.36 ± 0.15 b | 15.11 ± 0.99 b | |
| LPM | 867.24 ± 30.65 a | 128.66 ± 3.48 a | 3.24 ± 0.13 a | 21.14 ± 0.89 a | |
| ANOVA (ns, not significant; **, significant at 1%; ***, significant at 0.1%) | |||||
| Time | ns | ns | *** | ns | |
| Treatment | *** | *** | *** | *** | |
| Interaction | ns | ns | ns | ns | |
Mean values (n = 4) ± SE followed by different letters are statistically different (p < 0.05) according to the LSD test.