Table 2.
Results of general linear mixed models testing the effects of species, soil moisture content and their interaction on variation in content of four phytohormones in the Brachypodium distachyon species complex. The effect of genotype nested within species was incorporated as a random factor in the models. Significant values (P < 0.05) are in bold
| Source of variation | ABA (ng g−1) | JA (ng g−1) | IAA (ng g−1) | SA (ng g−1) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d.f. | F | P | d.f. | F | P | d.f. | F | P | d.f. | F | P | |
| Species (S) | 2,8 | 3.67 | 0.074 | 2,11 | 0.53 | 0.601 | 2,13 | 6.94 | 0.009 | 2,10 | 4.8 | 0.032 |
| Soil moisture (T) | 2,52 | 154.7 | <0.0001 | 2,53 | 4.2 | 0.02 | 2,55 | 3.16 | 0.052 | 2,53 | 3.97 | 0.024 |
| S × T | 4,51 | 59.4 | <0.0001 | 4,53 | 11.7 | <0.0001 | 4,54 | 3.58 | 0.011 | 4,53 | 2.43 | 0.058 |
| Random effects | Z | P | Z | P | Z | P | Z | P | ||||
| Genotype (species) | 0.54 | 0.586 | 1.83 | 0.067 | 1.23 | 0.219 | 1.78 | 0.075 | ||||