We investigated the antifungal activities of an endophytic fungus identified as Acaromyces ingoldii, found on a loblolly (Pinus taeda L.) pine bolt in Louisiana during routine laboratory microbial isolations. The specific objectives were to determine the inhibitory properties of A. ingoldii secondary metabolites (crude extract) on the mycelial growth of a brown-rot fungus Gloeophyllum trabeum and a white-rot fungus Trametes versicolor, and to determine the effective concentration of A. ingoldii crude preparation against the two decay fungi in vitro. Results show the crude preparation of A. ingoldii from liquid culture possesses significant mycelial growth inhibitory properties that are concentration dependent against the brown-rot and white-rot fungi evaluated. An increase in the concentration of A. ingoldii secondary metabolites significantly decreased the mycelial growth of both wood decay fungi. G. trabeum was more sensitive to the inhibitory effect of the secondary metabolites than T. versicolor. Identification of specific A. ingoldii secondary metabolites, and analysis of their efficacy/specificity warrants further study. Findings from this work may provide the first indication of useful roles for Acaromyces species in a forest environment, and perhaps a future potential in the development of biocontrol-based wood preservation systems.

我们调查了在常规实验室微生物分离过程中，在路易斯安那州的一颗火炬松（taeda taeda L.）松树螺栓上发现的一种内生真菌，称为Acaromyces ingoldii的抗真菌活性。具体的目标是确定A. ingoldii次生代谢产物（粗提取物）对褐腐真菌Gloeophyllum trabeum和白腐真菌Trametes versicolor的菌丝生长的抑制特性，并确定A. ingoldii的有效浓度。对两种腐烂真菌的体外粗制剂。结果显示粗制的A. ingoldii来自液体培养物的真菌具有显着的菌丝生长抑制特性，其浓度依赖于所评估的褐腐和白腐真菌。A. ingoldii次生代谢产物浓度的增加显着降低了两种木材腐烂真菌的菌丝生长。比起杂色T. versicolor而言，G. trabeum对次生代谢产物的抑制作用更敏感。特定的A. ingoldii次生代谢产物的鉴定及其功效/特异性的分析值得进一步研究。这项工作的发现可能提供第一个迹象，表明Acaromyces的有用作用 森林环境中的物种，也许还有基于生物控制的木材保存系统发展的未来潜力。