FibraureatinctoriaLour。 （防己科）是印度尼西亚和其他国家许多当地部落使用的药用植物。该物种具有药理潜力，例如抗疟疾、抗菌、抗肿瘤、抗氧化、抗癌、抗糖尿病、抗炎和保肝。然而，分泌结构和次生代谢产物积累的位点仍需要研究。本研究旨在探讨红花根、茎、叶中的分泌结构并揭示主要次生代谢物类的积累位点。使用各种特定试剂对新鲜器官的徒手切片进行组织化学分析，以检测生物碱、酚类、萜类化合物和亲脂性化合物。使用光学显微镜观察分泌结构。结果表明，成纤维细胞是植物器官中的主要分泌结构，包含所有研究的化学基团，而乳管积累的生物碱只在茎中发现。一些次生代谢产物位于木质部、细胞间隙和角质层中。在该物种的根、茎和叶中观察到晶体。这些结果可能有助于作为提取特定植物部分以获得所需次生代谢物的指导信息。这表明除了茎之外，叶子是该物种药用原料的潜在替代来源。研究亮点：首次对 Fibraureatinctoria 的分泌结构进行研究。 F.tinctoria 器官中的次生代谢物积聚在特化和非特化结构中。成虫细胞是 F.tinctoria 器官中的主要分泌结构，分布在根、茎和叶上。© 2024 Wiley periodicals LLC。

Fibraurea tinctoria Lour. (Menispermaceae) is a medicinal plant used by many local tribes in Indonesia and other countries. This species has pharmacological potential, such as antimalaria, antibacterial, antitumor, antioxidant, anticancer, antidiabetic, anti-inflammatory, and hepato-protector. However, the secretory structures and sites of secondary metabolite accumulation still need to be studied. This study aimed to explore the secretory structures and reveal the accumulation sites of the main classes of secondary metabolites in the root, stem, and leaves of F. tinctoria. Histochemical analysis using various specific reagents was performed on freehand sections of the fresh organs to detect alkaloids, phenolics, terpenoids, and lipophilic compounds. Observations of secretory structures were carried out using light microscopy. The result showed that idioblast was the predominant secretory structure in the plant organs and contained all the chemical groups investigated, while laticifer accumulated alkaloids were found only in the stem. Some secondary metabolites were localized in the xylem, intercellular space, and cuticle layer. Crystals were observed in the root, stem, and leaf of this species. These results might be helpful as guide information for extracting the particular plant parts to obtain the desired secondary metabolites. It suggested that leaves are a potential alternative source of medicinal raw material of this species, in addition to the stem. RESEARCH HIGHLIGHTS: The first study on secretory structures of Fibraurea tinctoria. Secondary metabolites in F. tinctoria organs accumulate in specialized and unspecialized structures. The idioblast is the primary secretory structure in the organs of F. tinctoria spreading over the root, stem, and leaves.© 2024 Wiley Periodicals LLC.