Figure 2. Comparison of the average bacterial community composition and relative abundances, at the phylum level (Proteobacteria divided into class) in root samples from three different plant species.

Results show a strong dominance of sequences belonging to Betaproteobacteria in all three plant species, but especially in T. hybridum (51%) and L. vulgare (50%). The phyla representing less than 1% out of the total community were grouped as “Other” and consisted of: NKB19, Nitrospirae, PAUC34f, Cyanobacteria, Elusimicrobia, Fibrobacteres, Chlamydiae, SC4, Spirochaetes and Thermi. Sequences not matching the database were recorded as “No blast hit.”