Tropical montane forests are threatened by uncontrolled fire events because of agricultural expansion. Consequently, deforested areas frequently are dominated by the bracken fern, Pteridium spp., for long periods, and forest regeneration is limited. Despite considerable research on bracken-dominated ecosystems, little is known about the relationship between bracken mycorrhizal fungi and tree seedlings. Arbuscular mycorrhizal fungi (AMF) form symbiotic relationships with terrestrial plants, providing nutrients and protection against pathogens and promoting seedling growth and establishment. Therefore, AMF inoculum have high potential for forest restoration programs. Here, we compare the species diversity of AMF spores, root colonization, and seedling growth of Clusia trochiformis 1 year after the addition of different liquefied root inocula: forest conspecific, forest heterospecific, and from Pteridium rhizomes. Thirteen morphospecies of arbuscular mycorrhizal fungi were identified on the roots of C. trochiformis, and Glomus spp. were the most abundant in all treatments. No differences were observed in spore species richness and diversity among treatments, but spore density was the highest subsequent to the Pteridium inoculum. There was no significant difference in mycorrhizal root colonization and seedling growth of C. trochiformis among inoculated treatments. We found a positive relation between root colonization and total biomass. This study shows that the AMF communities in bracken areas and forests present similar characteristics and that the bracken fern does not limit AMF inoculum potential, favouring seedling growth of Clusia.

由于农业扩张，热带山地森林受到不受控制的火灾事件的威胁。因此，砍伐森林的地区经常长期以蕨类蕨类植物蕨类植物为主，森林再生受到限制。尽管对以蕨菜为主的生态系统进行了大量研究，但对蕨菜菌根真菌与树苗之间的关系知之甚少。丛枝菌根真菌 (AMF) 与陆生植物形成共生关系，提供营养和保护免受病原体侵害，促进幼苗生长和建立。因此，AMF 接种物具有很高的森林恢复计划潜力。在这里，我们比较了 AMF 孢子的物种多样性、根系定殖和trochiformis幼苗生长1年后加入不同的液化根接种物：森林同种、森林异种和来自蕨根茎。在trochiformis和Glomus spp的根上鉴定出 13 种丛枝菌根真菌形态种。是所有处理中最丰富的。在孢子种类丰富度和多样性方面没有观察到处理之间的差异，但孢子密度是继蕨属接种物之后最高的。C. trochiformis的菌根定植和幼苗生长无显着差异在接种处理中。我们发现根定植与总生物量之间存在正相关关系。本研究表明，蕨类植物和森林中的AMF群落具有相似的特征，并且蕨类植物不限制AMF的接种潜力，有利于Clusia的幼苗生长。