Selection and application of endophytic bacterium Achromobacter xylosoxidans strain F3B for improving phytoremediation of phenolic pollutants

► Two hundred and nineteen endophytes bacteria were isolated from constructed wetland plants. ► The environmental isolate Achromobacter xylosoxidans F3B can use aromatic compounds as the sole carbon source. ► A novel real-time PCR monitoring system was developed for observing F3B. ► F3B is able to fully grow on other plant hosts and increase plant tolerance to lethal phytotoxic concentrations. ► F3B was demonstrated to enhance the efficiency of phytoremediation in hydroponic and soil tests.