Figure 1.

Total (A,B) and P-solubilizing bacteria (C–H) abundance on different media. Samples were taken in fall 2018 from two test sites (Sweden and Germany). (A,B) present the total bacterial count on plates with R2A medium for two levels of plant associations (rhizosphere and endophytic bacteria). Blue bars represent samples from Sweden and red from Germany. (C–H) show the abundance of bacteria present on selective media plates (blue and red bars) and the abundance of P-solubilizing bacteria (yellow bars). Small and capital letters indicate significant differences between the two willow species used (Tora = S. schwerinii x viminalis, Loden = S. dasyclados) (small letters for total bacteria count; capital letters for P-solubilizing bacteria). ^*Indicates differences between sites.