Biomineralization is a common process in most vascular plants, but poorly investigated for trees. Although the presence of calcium oxalate and silica accumulation has been reported for some tree species, the chemical composition, abundance, and quantification of biominerals remain poorly documented. However, biominerals may play important physiological and structural roles in trees, especially in forest ecosystems, which are characterized by nutrient‐poor soils. In this context, our study aimed at investigating the morphology, distribution, and relative abundance of biominerals in the different vegetative compartments (foliage, branch, trunk, and root) of Fagus sylvatica L. and Acer pseudoplatanus L. using a combination of scanning electron microscopy and tomography analyses. Biomineral crystallochemistry was assessed by X‐ray diffraction and energy‐dispersive X‐ray analyses, while calcium, silicon, and oxalic acid were quantified in the compartments and at the forest scale. Our analyses revealed that biominerals occurred as crystals or coating layers mostly in bark and leaves and were identified as opal, whewellite, and complex biominerals. In both tree species, opal was mostly found in the external tissues of trunk, branch, and leaves, but also in the roots of beech. In the stand, opal represents around 170 kg/ha. Whewellite was found to suit to conductive tissues (i.e., axial phloem parenchyma, vascular bundles, vessel element) in all investigated compartments of the two tree species. The shape of whewellite was prismatic and druses in beech, and almost all described shapes were seen in sycamore maple. Notably, the amount of whewellite was strongly correlated with the total calcium in all investigated compartments whatever the tree species is, suggesting a biologic control of whewellite precipitation. The amount of whewellite in the aboveground biomass of Montiers forest was more important than that of opal and was around 1170 kg/ha. Therefore, biominerals contribute in a substantial way to the biogeochemical cycles of silicon and calcium.

中文翻译：

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落叶林中生物矿物的鉴定，分布和定量。

生物矿化是大多数维管植物中的常见过程，但对树木的研究却很少。尽管据报道某些树种存在草酸钙和二氧化硅积聚，但化学矿物成分，丰度和生物矿物质的定量记录仍然很少。但是，生物矿物质可能在树木中起着重要的生理和结构作用，尤其是在以营养不良的土壤为特征的森林生态系统中。在这种情况下，我们的研究旨在调查青冈和假A宏草不同营养区室（叶子，分支，树干和根）中生物矿物的形态，分布和相对丰度。L.结合使用扫描电子显微镜和断层扫描分析。生物矿物晶体化学通过X射线衍射和能量分散X射线分析进行评估，而钙，硅和草酸则在车厢内和森林范围内进行定量。我们的分析表明，生物矿物以晶体或涂层的形式存在于树皮和树叶中，并被识别为蛋白石，辉绿岩和复杂的生物矿物。在这两种树种中，蛋白石主要存在于树干，树枝和树叶的外部组织中，但也存在于山毛榉的根部。在展位中，蛋白石约占170公斤/公顷。发现在两种树种的所有已调查隔间中，辉绿岩都适合于导电组织（即，轴向韧皮部薄壁组织，维管束，血管成分）。钙锰矿的形状呈棱柱形，在山毛榉中呈紫红色，几乎所有描述的形状都在美国梧桐枫树中看到。值得注意的是，无论树木种类如何，在所有被调查的车厢中，钙矾石的含量都与总钙含量密切相关，这表明对钙矾石沉淀的生物控制。蒙提尔森林地上生物量中的辉绿岩的数量比蛋白石更重要，约为1170千克/公顷。因此，生物矿物在很大程度上促进了硅和钙的生物地球化学循环。蒙提尔森林地上生物量中的辉绿岩的数量比蛋白石更重要，约为1170千克/公顷。因此，生物矿物在很大程度上促进了硅和钙的生物地球化学循环。蒙提尔森林地上生物量中的辉绿岩的数量比蛋白石更重要，约为1170千克/公顷。因此，生物矿物在很大程度上促进了硅和钙的生物地球化学循环。