从云南元江野生仙人掌的肉质茎中分离出28株内生真菌,经形态学分类鉴定归于3个目,3个科,10个属。同时选择30种病原微生物作为指示菌进行抑菌试验,研究其抑菌活性。结果表明,3株元江仙人掌内生真菌分别对细菌、植物病原真菌和皮肤致病真菌多种病原微生物有较为明显的抑制生长作用。 28 strains of endophytic fungi were isolated from the fleshy stems of wild cacti in Yuanjiang, Yunnan, and were identified by morphological classification into 3 orders, 3 families and 10 genera. At the same time, 30 kinds of pathogenic microorganisms were selected as indicators to conduct antibacterial tests and their antibacterial activities were studied. The results showed that the three endophytic fungi of Yuanjiang cactus had obvious growth inhibition effects on bacteria, phytopathogenic fungi, and pathogenic microorganisms of dermatophyte fungi.