Figure 4.

Number of shared OTUs between plant groups (grasses, forbs and legumes) and the feedback they caused to the growth of Chrysanthemum (for classification, see Supporting Information Fig. S2). Forb soils are coloured green, grasses turquoise, and legumes purple. Plants having growth promoting effect on chrysanthemum are depicted in yellow and plants with negative feedback with orange. For OTU to be present in plant group, it needed to be present in at least 20% of the samples. For the right side, OTU needed to be present with > 20% of samples in all three groups of plants. The category specific (good forbs, bad forbs, good grasses, bad grasses, good legumes, bad legumes) fungal and bacterial phyla to which the majority of OTUs belonged in the category are shown in the left panel. The genera that caused positive or negative feedbacks across plant groups are listed on the right side.