Abstract

• In the isolation of endophytic fungi, 5 different plant sources were collected in Pathein Area and10 kinds of endophytic fungi (TP-01,02,03,04,05,06,07,08,09,10) were isolated. For the antifungal activities, the pathogenic fungi were isolated from the seeds of sunflower grown in Hinthada Area. Three kinds of pathogenic fungi ( PF-01,PF-02,PF-03 ) were isolated by serial dilution methods. Ten kinds of isolated endophytic fungi were tested for antifungal activities. Among them, 4 kinds of endophytic fungi (TP-01,08,09,10 ) showed the antifungal activities (15 mm, 14 mm, 17 mm and 21 mm of inhibitory zones) on pathogenic fungus ( PF-03 ) of sunflower seeds. According to these inhibitory zones, the biggest zone (21 mm) of endophytic fungus from Polygonum barbatum L. (suzat-pan) belonging to the family of Polygonaceae was selected for further investigation. Selected endophytic fungus ( TP-10 ) and pathogenic fungus ( PF-03 ) were identified by using reference keys. These selected fungus were important for all farmers because the seed-borne fungi were deterioration in sunflower oil and lost yield. .