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Fig. S1 Relationship of total plant biomass for each host species with CO2 treatment and arbuscular mycorrhizal status.

Fig. S2 Relationship of leaf phosphorus concentration (percent P) with P for each host species.

Table S1 Statistical model of optical density values (estimating relative virus titer) for virus-infected plants

Table S2 Statistical model of percentage hyphal colonization by mycorrhizal fungi for plants associating with arbuscular mycorrhizal fungi

Table S3 Statistical model of total plant biomass

Table S4 Statistical model of root fraction

Table S5 Statistical model of percentage leaf phosphorus