Fluoride (F) is considered one of the most phytotoxic pollutants, even when present in low concentrations. When dispersed in the air, F can be transported to about 100 km from the polluting source, reaching plants, animals and humans and causing serious damage. Nevertheless, studies are still scarce on the effect of fluoride in Cerrado species integrating morphological, anatomical and physiological responses. Therefore, this study aimed to investigate the effect of simulated rainfall containing potassium fluoride (KF) on Hancornia speciosa leaves and roots, to determine its bioaccumulator potential. Young plants at approximately 45 days of emergence were treated daily with simulated KF rain at four concentrations (0, 4, 8 and 12 mg L⁻¹), and four replicates. The experiment was carried out for 40 days, in completely randomized design. After KF exposure, visual, morphological and chlorophyll a fluorescence analyses were performed, alongside fluoride accumulation assessments in roots and shoots. Hancornia speciosa did not present any visual, anatomical and physiological symptoms in response to fluoride; however, it showed an accumulation of phenolic compounds in mesophyll root and leaf cells in all treatments. Physiological characteristic preservation and fluoride accumulation in roots and leaves allow us to suggest that Hancornia speciosa displays tolerance potential at the investigated doses.

氟化物（F）即使在低浓度下也被认为是最具植物毒性的污染物之一。当F散布在空气中时，可以被运送到距污染源约100公里处，到达植物，动物和人类，并造成严重破坏。尽管如此，关于氟对塞拉多物种中形态，解剖和生理反应的影响的研究仍很少。因此，本研究旨在调查模拟的含氟化钾（KF）降雨对汉角藻叶片和根的影响，以确定其生物蓄积潜力。每天在大约45天的出苗状态下，用模拟的KF雨水以4种浓度（0、4、8和12 mg L ^-1）处理）和四个副本。实验以完全随机的设计进行了40天。KF暴露后，进行视觉，形态和叶绿素a荧光分析，同时评估根和茎中的氟化物积累。汉弗尼亚菌对氟化物没有任何视觉，解剖和生理症状。然而，在所有处理中，它都显示出叶肉根和叶细胞中酚类化合物的积累。生理特征的保存和根与叶中氟化物的积累使我们可以认为汉角藻在所研究的剂量下显示出耐受力。