Table 3.
Shoot and root dry weight, NDVI, root to shoot ratio, and shoot nitrogen and carbon abundance and discrimination, under well-watered and water/nutrient stress conditions at 25 days post stress (dps).
| Traits | Shoot Dry Weight (mg) | Root Dry Weight (mg) | NDVI | Root to Shoot Ratio | ||||||||
| Coating | WW | WNS | RR (%) | WW | WNS | RR (%) | WW | WNS | RR (%) | WW | WNS | RR (%) |
| CC | 35.89 b ± 3.83 | 16.04 d ± 0.57 | 55.3% | 31.28 b ± 0.72 | 9.05 d ± 0.22 | 71% | 0.16 c ± 0.00 | 0.14 d ± 0.005 | 12.5% | 0.879 a ± 0.1 | 0.565 b ± 0.03 | 35.7% |
| CT | 44.94 a ± 0.38 | 23.40 c ± 1.42 | 47.9% | 44.32 a ± 0.68 | 21.51 c ± 0.94 | 51.4% | 0.21 a ± 0.005 | 0.19 b ± 0.005 | 9.52% | 0.986 a ± 0.01 | 0.921 a ± 0.06 | 6.59% |
| ANOVA | ||||||||||||
| Coating (C) | 47.008 *** | 1006.094 *** | 300 *** | 23.182 *** | ||||||||
| Irrigation + nutrient supply (I + N) | 298.811 *** | 3138.739 *** | 33.333 *** | 11.870 ** | ||||||||
| (T × (I + N)) | 0.498 n.s. | 0.509 n.s. | 1.333 n.s. | 6.521 * | ||||||||
| Traits | Shoot N content (DM, %) | Shoot δ15N (‰) | Shoot C content (DM, %) | Shoot δ13C (‰) | ||||||||
| Coating | WW | WNS | IR (%) | WW | WNS | IR/RR (%) | WW | WNS | IR/RR (%) | WW | WNS | IR (%) |
| CC | 3.54 b ± 0.08 | 3.74 b ± 0.11 | 5.34% | 5.06 b ± 0.26 | 4.32 c ± 0.07 | RR 14.6% | 47.38 a ± 2.1 | 40.88 b ± 0.58 | RR 13.7% | 30.77 c ± 0.05 | −29.80 a ± 0.08 | 3.15% |
| CT | 2.87 c ± 0.14 | 4.25 a ± 0.15 | 32.2% | 4.16 c ± 0.29 | 5.86 a ± 0.07 | IR 29% | 42.46 b ± 0.16 | 45.15 a ± 1.67 | IR 5.9% | 30.00 b ± 0.05 | −29.68 a ± 0.12 | 1.06% |
| ANOVA | ||||||||||||
| Coating (C) | 1.155 n.s. | 7.487 * | 0.168 n.s. | 86.58 *** | ||||||||
| Irrigation + nutrient supply (I + N) | 116.302 *** | 17.065 ** | 5.729 * | 187.56 *** | ||||||||
| (T × (I + N)) | 64.311 *** | 108.959 *** | 33.363 *** | 46.16 *** | ||||||||
The F values are shown, and the symbols indicate statistical significance (n.s. p > 0.1, * p < 0.05; ** p < 0.01; *** p < 0.001). Values with different superscript letters are significantly different classes according to the LSD test (p ≤ 0.05). DM: Dry matter; WW: Well watered; WNS: Water/nutrient stress; RR: Reduction rate; IR: Increase rate; CC: Coated control; CT: Coated with thyme oil.