Fig. 5

The core microbiome identified in substrate samples collected from container-grown Impatiens walleriana ‘Xtreme Red’. Plants were fertilized with 15N-2.2P-12.5 K-2.9Ca-1.2 Mg water-soluble fertilizer at low (25 mg/L N), optimum (100 mg/L N), and high (200 mg/L N) levels. Samples were collected at budding (four weeks after transplant) and full flowering (eight weeks after transplant). The core taxa were defined by 100% persistence (present in both collection time points), 100% prevalence (present in all samples of a treatment) and at least 0.001% abundance. Phylogenetic tree depicts taxa with 100% persistence, and tips are colored by phylum and annotated according to presence within the fertilizer treatments. Shared (color) refers to amplicon sequence variants present in at least two fertilizer treatments