Abstract:Piriformospora indica, an endophytic fungus, colonizes the roots of various plant species to promote their growth, nutrient absorption, accumulation of secondary metabolites, and tolerance to biotic and abiotic stresses and increase their biomass. Therefore, P. indica has great potential for biocontrol and soil improvement and thus can be applied in agricultural production. In this paper, we summarized the research progress of P. indica in improving the resistance of plants to biotic and abiotic stresses in recent 10 years, hoping to enhance the understanding P. indica-plant interaction and bring into full play its functions.