Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine, Hainan Branch of the Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Haikou, China.
Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Microsc Res Tech. 2023 Oct;86(10):1333-1344. doi: 10.1002/jemt.24317. Epub 2023 Mar 15.
Dracaena cambodiana Pierre ex Gagnep is an important plant resource for producing dragon's blood and one of most popular ornamental trees in China. For a better understanding of the physiological function of the stem, the structural characteristics and main substance histological location of the stems of D. cambodiana were studied. The structural characteristics of the different developmental stages of stems of D. cambodiana were observed and described detailly. And then a schematic diagram of the mature stem was created. Histochemical staining showed that two kinds of polysaccharides distributed in parenchymal cells. Saponins distributed mainly in ground tissue and phenolic compounds distributed mainly in the thick cell walls. An abundant of calcium oxalate raphide bundles were identified in cortex and primary tissue. Finally, the role of the above results in the taxonomy of Dracaena species and in their strong adaptability was discussed.
龙血树是柬埔寨龙血树 Pierre ex Gagnep，是生产龙血竭的重要植物资源，也是中国最受欢迎的观赏树种之一。为了更好地了解茎的生理功能，对柬埔寨龙血树茎的结构特征和主要物质组织学定位进行了研究。详细观察和描述了不同发育阶段茎的结构特征。然后创建了一个成熟茎的示意图。组织化学染色表明，两种多糖分布在实质细胞中。皂甙主要分布在基质组织中，酚类化合物主要分布在厚细胞壁中。在皮层和初生组织中鉴定出大量的草酸钙针晶束。最后，讨论了上述结果在龙血树属分类学中的作用及其对其强适应性的影响。
