The concentration and plant concentration factors of phenanthrene in Hoagland solution and in ryegrass added with 2 mg·L−1 of phenanthrene in the solution.

CK (contaminated solution), CR (planted ryegrass in contaminated solution), CRB (planted ryegrass and inoculated with strain Pn2 in contaminated solution). PCF (Plant concentration factor, which is calculated as pollutant content in the plant roots or shoots (Cp, mg·kg−1)/the concentration of pollutant in solution (Cs, mg·l−1), PCF = Cp/Cs), TF (Plant tanslocation factor, that is shoot concentration factor (SCF)/root concentration factor (RCF), TF = SCF/RCF). Error bars are ± standard deviation (n = 3). ND means not detected. * indicates a significant difference between endophyte-inoculated and endophyte-free treatments in contaminated solutions (PThe concentration and plant concentration factors of phenanthrene in Hoagland solution and in ryegrass added with 2 mg·L−1 of phenanthrene in the solution.