Conditions Promoting Mycorrhizal Parasitism Are of Minor Importance for Competitive Interactions in Two Differentially Mycotrophic Species.

In addition to the highly significant main effects of all four factors (species, mycorrhization, competition, and parasitism scale) on biomass ( p < 0.001; Table 3 ), significant interactions were found for all factor combinations ( p < 0.05), except for “species × mycorrhization × competition,” “species × competition × parasitism scale,” “mycorrhiza × competition × parasitism scale,” and the combination of all four factors (Table 3 ).

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