Table 1.
Source of variance | A | B | C | A × B | A × C | B × C | A × B × C | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Degrees of freedom |
3 |
1 |
1 |
3 |
3 |
3 |
3 |
|||||||
Variables: | ||||||||||||||
Photosynthetic rate (µmol CO2 m−2 s−1) | *** | *** | *** | *** | ** | ** | * | |||||||
AMF | ||||||||||||||
AC (%) | *** | *** | *** | * | ns | ns | ns | |||||||
VC (%) | *** | *** | * | *** | * | ns | ns | |||||||
HC (%) | *** | *** | *** | *** | ns | ns | ns | |||||||
N, P content | ||||||||||||||
Leaf N (mg g−1) | *** | *** | *** | *** | *** | * | ns | |||||||
Stem N (mg g−1) | *** | *** | *** | *** | *** | ns | ns | |||||||
Root N (mg g−1) | *** | *** | *** | *** | ** | * | ns | |||||||
Nodule N (mg g−1) | *** | *** | *** | ns | ns | * | ns | |||||||
Leaf P (mg g−1) | *** | *** | *** | *** | ** | ** | ns | |||||||
Stem P (mg g−1) | *** | *** | *** | *** | *** | *** | ** | |||||||
Root P (mg g−1) | *** | *** | *** | *** | *** | *** | ** | |||||||
Nodule P (mg g−1) | *** | *** | *** | ns | ns | ** | ns | |||||||
Biomass of plant part | ||||||||||||||
Leaf area (cm2 plant−1) | *** | *** | *** | *** | *** | ** | * | |||||||
Leaf d. wt (g plant−1) | *** | *** | *** | ** | * | ** | ns | |||||||
Stem d. wt (g plant−1) | *** | *** | *** | ns | * | * | ns | |||||||
Root d. wt (g plant−1) | *** | *** | *** | * | * | ** | ns | |||||||
Nodule d. wt (g plant−1) | * | *** | *** | ns | ns | *** | ns | |||||||
Biomass (g plant−1) | *** | *** | *** | *** | *** | *** | ns |
Percentage AMF colonization, dry mass, leaf area, elemental N and P concentrations of leaves, stems, roots and nodules were analysed by three-way ANOVA with residual estimation, for main effects and interaction effects.
*, **, *** Effects that are significant at P < 0·05, 0·01 and 0·001, respectively; ns, effects that are not significant at P < 0·05.