Morphological anatomy research on the rare and endangered plant Geranium tsingtauense | 珍稀濒危植物青岛老鹳草形态解剖学研究_

Chinese. ［目的］为了解青岛老鹳草濒危的原因，为其资源利用、引种驯化和新品种培育等提供理论依据。［方法］分别以青岛老鹳草的根尖、茎段、叶片、叶柄为材料，采用常规石蜡法制片，对其进行形态解剖学观察。［结果］青岛老鹳草根的初生结构由表皮、皮层和中柱组成，初生木质部为二原型；次生结构由周皮、薄壁组织和次生维管组织构成，薄壁细胞中含有大量淀粉粒；茎呈类方形，由表皮、皮层和维管柱组成，为外韧维管束；叶为典型异面叶，表皮具有大量表皮毛，叶及叶柄均具厚角组织。根茎叶细胞中均含有大量簇晶。［结论］青岛老鹳草营养器官具有一般多年生草本双子叶植物的结构特点，在形态结构方面未体现出濒危的特点。_

English. ［Objective］ The aim of the research was to learn about the endangered reasons of Geranium tsingtauense and provide theoretical foundation for its resource utilization, introduction and domestication and new cultivar breeding. ［Method］ With root tips, stems, leaves and petioles of Geranium tsingtauense as materials, they were sectioned by routine paraffin section for morphological anatomic observation. ［Result］ The primary structure of Geranium tsingtauense root was composed of epidermis, cortex and central cylinder and its primary xylem was diarch; its secondary structure was composed of periderm, parenchymal tissue and secondary vascular tissue and its parenchymal cells contained numerous starch grains; its stem was collateral bundle composed of epidermis, cortex and vascular cylinder and nearly square; its leaves were typical bifacial leaves and had numerous epidermal hair on the epidermis; its leaves and petioles had collenchyma. There were numerous cluster crystals contained in the cells of roots, stems and leaves. ［Conclusion］ The nutritorium of Geranium tsingtauense had structure characters of general perennial herbal dicotyledon and it did not show endangered characters in morphological structure. _