Our studies showed the endophyte Burkholderia 869T2 help banana to stand against the Panama diseaseimprove growths of pumpkin, cabbage,other crops. The 869T2 helps plants cope with salinity stresscan decrease dioxin accumulations in plants. The specific metabolite PQQ of 869T2 benefits host plant growths. The beneficial endophytethe metabolite can be developed as an protective endophytic agent.