Table 3.
Interaction effects of irrigation regime × AMF × PGPR on root colonization (Clon), shoot dry weight (DWS), root dry weight (DWR), DPPH activity, and total phenolic (Phe) of Arizona cypress seedling.
| Treatments | Clon (%) | DWS (g plant−1) | DWR (g plant−1) | DPPH (%) | Phe (mg TAE g−1 DW) |
|---|---|---|---|---|---|
| N | |||||
| C | 0.01 ± 0.0h | 3.60 ± 0.10c | 2.66 ± 0.11cd | 39.1 ± 2.0i | 4.4 ± 0.21h |
| RI | 24.3 ± 3.0ef | 3.38 ± 0.19cd | 2.50 ± 0.07d | 43.0 ± 2.0hi | 6.1 ± 1.6e–h |
| FM | 23.6 ± 1.6fg | 3.19 ± 0.10c–f | 2.29 ± 0.48de | 48.6 ± 2.5fg | 7.2 ± 0.44e |
| Mix | 30.7 ± 4.4cd | 3.25 ± 0.63c–f | 2.58 ± 0.49cd | 43.4 ± 4.7hi | 5.0 ± 0.90gh |
| Ps | 0.01 ± 0.0h | 3.41 ± 0.12e | 2.28 ± 0.12de | 45.1 ± 3.3gh | 5.2 ± 1.5f–h |
| RI + Ps | 43.1 ± 2.5b | 4.35 ± 0.10b | 3.06 ± 0.15bc | 49.7 ± 1.0ef | 9.2 ± 1.0cd |
| FM + Ps | 42.4 ± 4.7b | 4.52 ± 0.23b | 3.35 ± 0.25b | 56.5 ± 2.1a–c | 10.4 ± 1.4bc |
| Mix + Ps | 54.7 ± 3.2a | 4.71 ± 0.18a | 3.97 ± 0.11a | 51.9 ± 5.6d–f | 10.8 ± 0.24bc |
| S | |||||
| C | 0.01 ± 0.0h | 1.73 ± 0.07g | 0.983 ± 0.21f | 43.4 ± 2.4hi | 4.7 ± 0.62gh |
| RI | 19.4 ± 2.3g | 2.86 ± 0.09d–f | 1.91 ± 0.09e | 50.8 ± 2.1d–f | 6.8 ± 1.4ef |
| FM | 21.1 ± 2.7fg | 3.06 ± 0.19c–f | 2.16 ± 0.15de | 57.3 ± 2.0ab | 7.8 ± 0.92de |
| Mix | 24.5 ± 1.7ef | 2.72 ± 0.06f | 1.92 ± 0.06e | 54.5 ± 1.1b–d | 6.3 ± 1.1e–g |
| Ps | 0.01 ± 0.0h | 1.90 ± 0.14g | 1.03 ± 0.04f | 42.5 ± 3.0hi | 7.7 ± 1.1de |
| RI + Ps | 35.9 ± 2.4c | 3.17 ± 0.06c–f | 2.31 ± 0.06de | 53.3 ± 1.8b–e | 11.6 ± 1.1ab |
| FM + Ps | 28.5 ± 4.7de | 2.83 ± 0.09e–f | 1.97 ± 0.14e | 60.1 ± 2.0a | 12.8 ± 1.2a |
| Mix + Ps | 32.8 ± 4.2cd | 2.49 ± 0.32c | 2.46 ± 0.21d | 52.4 ± 1.3c–f | 12.1 ± 0.71ab |
Means (± SD) followed by similar letters within each column do not express signifiant diffrences according to LSD at P < 0.05.
N well watered (100% field capacity); S water stress (50% field capacity), RI Rhizophagus irregularis, FM Funneliformis mosseae, Mix: R. irregularis–F. mosseae mixture, C non-inoculated plants, Ps Pseudomonas fluorescens, TAE tannic acid equivalent.