Supplemental Table S6. Number of genera that were assigned to the different classes with respect to their relative sequence load or their ability to respond significantly to different root environments (fine vs. coarse roots, variety). The dominant genera each contain more than 0.5% of the genera-assigned sequences while the rare genera contain fewer. Absolute numbers of genera (#) and the proportion of all genera in the respective category (%) are given for the different categories.

All Genera / Dominant genera / Rare genera / Responsive genera
Class / # / % / # / % / # / % / # / %
Actinobacteria / 130 / 25.5 / 13 / 26.5 / 117 / 25.4 / 26 / 28.6
Alphaproteobacteria / 71 / 13.9 / 8 / 16.3 / 63 / 13.7 / 10 / 11.0
Betaproteobacteria / 56 / 11.0 / 9 / 18.4 / 47 / 10.2 / 12 / 13.2
Clostridia / 49 / 9.6 / 0 / 0 / 49 / 10.6 / 5 / 5.5
Bacilli / 45 / 8.8 / 3 / 6.1 / 42 / 9.1 / 7 / 7.7
Gammaproteobacteria / 39 / 7.6 / 3 / 6.1 / 36 / 7.8 / 8 / 8.8
Sphingobacteria / 25 / 4.9 / 2 / 4.1 / 23 / 5.0 / 3 / 3.3
Deltaproteobacteria / 20 / 3.9 / 0 / 0 / 20 / 4.3 / 4 / 4.4
Flavobacteria / 8 / 1.6 / 0 / 0 / 8 / 1.7 / 1 / 1.1
Planctomycetacia / 8 / 1.6 / 0 / 0 / 8 / 1.7 / 3 / 3.3
Cyanobacteria / 4 / 0.8 / 1 / 2.0 / 3 / 0.7 / 2 / 2.2
Chlamydiae / 3 / 0.6 / 0 / 0 / 3 / 0.7 / 1 / 1.1
Erysipelotrichi / 3 / 0.6 / 0 / 0 / 3 / 0.7 / 1 / 1.1
Verrucomicrobiae / 3 / 0.6 / 1 / 2.0 / 2 / 0.4 / 2 / 2.2
Anaerolineae / 2 / 0.4 / 0 / 0 / 2 / 0.4 / 0 / 0
Chloroflexi / 2 / 0.4 / 0 / 0 / 2 / 0.4 / 1 / 1.1
Deinococci / 2 / 0.4 / 0 / 0 / 2 / 0.4 / 0 / 0
Opitutae / 2 / 0.4 / 1 / 2.0 / 1 / 0.2 / 1 / 1.1
Spartobacteria / 2 / 0.4 / 1 / 2.0 / 1 / 0.2 / 0 / 0
Spirochaetes / 2 / 0.4 / 0 / 0 / 2 / 0.4 / 0 / 0
Acidobacteria_Gp1 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 1 / 1.1
Acidobacteria_Gp10 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp11 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp13 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp15 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp16 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp17 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp18 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp19 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp2 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp20 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp22 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp25 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp3 / 1 / 0.2 / 1 / 2.0 / 0 / 0 / 0 / 0
Acidobacteria_Gp4 / 1 / 0.2 / 1 / 2.0 / 0 / 0 / 0 / 0
Acidobacteria_Gp5 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Acidobacteria_Gp6 / 1 / 0.2 / 1 / 2.0 / 0 / 0 / 0 / 0
Acidobacteria_Gp7 / 1 / 0.2 / 1 / 2.0 / 0 / 0 / 0 / 0
Acidobacteria_Gp9 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Bacteroidia / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Caldilineae / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Fusobacteria / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Gemmatimonadetes / 1 / 0.2 / 1 / 2.0 / 0 / 0 / 1 / 1.1
Holophagae / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Ktedonobacteria / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 1 / 1.1
Nitrospira / 1 / 0.2 / 1 / 2.0 / 0 / 0 / 0 / 0
OP10 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
OP11 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Subdivision3 / 1 / 0.2 / 1 / 2.0 / 0 / 0 / 1 / 1.1
Thermomicrobia / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
unclassified_BRC1 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
unclassified_OD1 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
unclassified_TM7 / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
WS3_genera_incertae_sedis / 1 / 0.2 / 0 / 0 / 1 / 0.2 / 0 / 0
Sum / 510 / 100 / 49 / 100 / 461 / 100 / 91 / 100