Abstract:Naematelia aurantialba strain was used as the material to investigate the effects of different carbon and nitrogen sources on N. aurantialba mycelial growth，with chloramphenicol potato dextrose agar （cPDA）plate growth，mycelial growth rate，mycelial branching morphology under microscopy，and aerial mycelium diameter as indicators. The results showed that when the carbon source was sucrose，N. aurantialba mycelial growth was the best，with dense and white mycelia. The central mycelia were wrinkled and swollen，demonstrating the highest mycelial growth rate. Additionally，more branches were observed in the tip mycelia，with the largest aerial mycelium diameter. When the nitrogen source was peptone，N. aurantialba mycelial growth was the best，with dense and whiter mycelia. Less yellow secretion was found on the back，with the highest mycelial growth rate. Additionally，more branches were observed in the tip mycelia，with the largest aerial mycelium diameter.