Abstract：
Eucommia ulmoides rubber (EUR) is a high-quality natural rubber resource, which can be extracted from different organs of the Eucommia ulmoides tree. In this study, EUR was isolated from the leaves, barks, and pericarps, and the structural characteristics and physicochemical properties of EUR were systematically determined. The accumulation and distribution of EUR in different tissues were assessed through in situ observations combined with cellular and subcellular scales. The preliminary analyses indicated that the variations in the physicochemical properties of EUR across different tissues were associated with its accumulation microstructure. Further analyses by SEM and TEM showed that the initial cell differentiation and fusion resulted in the formation of tubular structures without any nucleus. A limited number of rubber particles were generated within the cytoplasm, concurrent with aggregation and fusion. Eventually, rubber particles filled the entire cytoplasm, and organelles disappeared to form highly aggregated filamentous structures. In addition, the number and area of EUR-containing cells were closely related to the organization sizes of barks and leaves. This study provided valuable insights into Eucommia ulmoides histology and the rubber industry.
摘要：
杜仲橡胶（EUR）是一种优质的天然橡胶资源，可以从杜仲树的不同器官中提取。在这项研究中,欧元是从树叶中分离出来的，吠叫,和果皮,系统地测定了EUR的结构特征和理化性质。通过原位观察结合细胞和亚细胞尺度评估了EUR在不同组织中的积累和分布。初步分析表明，EUR在不同组织中的理化性质变化与其积累微观结构有关。SEM和TEM的进一步分析表明，最初的细胞分化和融合导致没有任何细胞核的管状结构的形成。细胞质内产生了有限数量的橡胶颗粒，与聚合和融合并发。最终,橡胶颗粒填充了整个细胞质，细胞器消失，形成高度聚集的丝状结构。此外,含EUR细胞的数量和面积与树皮和叶片的组织大小密切相关。这项研究为杜仲组织学和橡胶工业提供了有价值的见解。
