Fig 1.
Percent ectomycorrhizal fungal colonization by Suillus americanus (a,d), S. subaureus (b,e), and S. spraguei (c,f) on Pinus strobus seedlings after 4 and 8 months of growth.
Boxes represent the 2nd and 3rd interquartile ranges; the horizontal lines in the boxes represent the median; the upper and lower bars outside the boxes represent the 1st and 4th quartiles, respectively. Letters indicate significant statistical differences (p < 0.05) between means based on Tukey HSD tests. N = 7 for each treatment at both time points.
Table 1.
Frequency of ectomycorrhizal fungal colonization and total biomass of Pinus strobus seedlings in the competition bioassay.
Fig 2.
Distribution of the three Suillus species based on observations in the iNaturalist database (main map) and collections in Minnesota from the Bell Museum of Natural History Herbarium (inset).