Authenticated Axonopus leptostachyus was collected in the city of Pocone, Pantanal of Mato Grosso, Mato Grosso, Brazil, in April 2012. The endophytic fungus Aspergillus terreus P63 was isolated from roots of the grass Axonopus leptostachyus, which were subjected to surface sterilization. The endophytic fungus strain A. terreus P63 was cultivated in two 500 mL Erlenmeyer flasks, each containing 30 mL of distilled water and 25.0 g of rolled oats. The media were autoclaved two times (in two consecutive days) at 121 ℃ for 20 min. Following sterilization, approximately 4 small pieces (2 × 2 cm) of PDA medium, from the Petri dish containing biomass of the A. terreus P63 isolated was inoculated into each flask and the flasks were sealed with cotton to permit aerobic growth. The media inoculated with the endophyte were incubated while stationary at 25 ℃ for 30 days in the dark.