The general objective of this work was to evaluate the quality of the little-known tropical woods of the Congo Basin, particularly Coula edulis, while looking for new biocidal products. The natural durability of the hazel tree of Gabon Coula edulis versus basidiomycete fungi was evaluated with native and extracted samples of heartwood against brown rot (Rhodonia placenta and Coniophora puteana) and white rot (Trametes versicolor and Pycnoporus sanguineus) fungi. The results showed that non-extracted samples were more durable. Fungal growth inhibition tests using different concentrations of extractives confirmed the fungicidal effects. Percentage of the different wood polymers and GC–MS analysis of wood extractives were carried out to examine correlations between durability and wood chemistry. Natural durability of Coula edulis could be explained by the unusually high lignin content and the presence of high amounts of polyphenols like gallic and ellagic acids and tannins. Coula edulis could therefore be a local alternative to help alleviate wood shortages in Gabon.

中文翻译：

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加蓬作为替代木种的 Coula edulis Baill 的化学成分与腐烂耐久性之间的关系

这项工作的总体目标是评估刚果盆地鲜为人知的热带木材的质量，特别是 Coula edulis，同时寻找新的杀菌产品。加蓬 Coula edulis 的榛树与担子菌的天然耐久性通过天然和提取的心材样品对褐腐病（Rhodonia placenta 和 Coniophora puteana）和白腐病（Trametes versicolor 和 Pycnoporus sanguineus）真菌进行评估。结果表明，未提取的样品更耐用。使用不同浓度提取物的真菌生长抑制试验证实了杀真菌作用。进行了不同木材聚合物的百分比和木材提取物的 GC-MS 分析，以检查耐久性和木材化学之间的相关性。Coula edulis 的天然耐久性可以通过异常高的木质素含量以及大量多酚（如没食子酸、鞣花酸和单宁酸）的存在来解释。因此，Coula edulis 可以成为帮助缓解加蓬木材短缺的当地替代品。