Figure 3. Effect of mycorrhizal inoculation, P level and social environment on aboveground biomass for juvenile A. artemisiifolia L plants.

Plants were grown in shared pots (siblings or strangers) or solitary (alone) (n = 606). Groups of four plants were either un-inoculated and given high P fertilizer (white bars), un-inoculated and given low P fertilizer (striped bars), inoculated and given high P fertilizer (black bars) or inoculated and given low P fertilizer (grey bars). Spores of G. intraradices were used to inoculate pots. Data presented are the back-transformed lsmeans of log(aboveground biomass +0.5). Error bars represent ±1 s.e.m.