Resprouting from belowground buds enables plants to survive after aboveground biomass loss in the Brazilian Cerrado. Although resprouting is a common functional strategy in disturbance-prone ecosystems, we poorly understand the anatomy of belowground bud-bearing organs. Here, we aimed to describe traits related to the resprouting ability of four native Cerrado species from an area under regeneration after the removal of a slash-pine plantation (Pinus elliottii), by analyzing their belowground bud-bank, the structural features of their belowground bud-bearing organs, and their storage compounds. We evaluated the belowground bud bank size of all species, conducted anatomical analyses to describe their belowground bud-bearing organs, identified the chemical compounds stored. The belowground bud bank size varied according to the number of belowground bases of aerial stems and branches emitted by the belowground bud-bearing organs. Anemopaegma arvense, Peltaea polymorpha, and Psidium laruotteanum presented xylopodia. The xylopodium of A. arvense had plagiotropic roots with adventitious buds. Moreover, A. arvense and Peritassa campestris presented cambial variants in their belowground organs (phloem wedges and successive cambia, respectively). Starch, phenolic compounds, and carotenoids were the main storage and protective compounds, occurring in the periderm, vascular rays, and parenchyma pith cells. Our findings suggest that the analyzed species were able to resprout after pine removal due to the maintenance of a belowground bud bank protected and resourced by belowground bud-bearing organs. Gaining such insight on belowground bud banks is essential in the understanding of the resprouting ability after natural and/or human-induced disturbances.

在巴西塞拉多的地上生物量损失后，从地下芽中重新发芽使植物能够存活。尽管在易受干扰的生态系统中重新发芽是一种常见的功能策略，但我们对地下萌芽器官的解剖结构了解甚少。在这里，我们的目的是描述与去除湿地松种植园（Pinus elliottii）后再生区域的四种本地塞拉多物种的重新发芽能力相关的特征)，通过分析它们的地下芽库、地下萌芽器官的结构特征和它们的贮藏化合物。我们评估了所有物种的地下芽库大小，进行了解剖分析以描述它们的地下芽器官，确定了储存的化合物。地下芽库的大小根据地下萌芽器官发出的地上茎和分枝的地下基部数量而变化。Anemopaegma arvense、Peltaea polymorpha和Psidium laruotteanum呈现木足类。A. arvense的木足具有斜向根和不定芽。此外，A. arvense和Peritassa campestris在它们的地下器官（分别是韧皮部楔形和连续的 cambia）中呈现了形成层的变体。淀粉、酚类化合物和类胡萝卜素是主要的储存和保护化合物，存在于周皮、血管射线和薄壁组织髓细胞中。我们的研究结果表明，分析的物种能够在松树移除后重新发芽，因为地下芽库的维护受到地下芽器官的保护和资源。获得对地下芽库的这种洞察力对于理解自然和/或人为干扰后的重新发芽能力至关重要。