新疆天山一号冰川地区12种藓类植物叶形态结构研究

Leaf morphological structure of twelve moss species from the No.1 glacier of the Tianshan Mountains

采用石蜡切片和扫描电镜的方法,对新疆天山一号冰川地区的12种藓类植物叶片结构及叶表面微形态进行了观察。结果显示,不同苔藓植物叶细胞、中肋、细胞壁、细胞表面等各项指标在类型、大小、分布、干燥时细胞壁的凹陷程度以及表面角质层纹饰和小孔形态、分布等都明显不同,这些微形态特点不仅在藓类植物属下种间的区分上具有分类学意义,同时也反映出藓类植物叶片为保水抗旱,抵御长期寒冷、多风和强光照射等恶劣环境对其的伤害而形成的生存策略。本研究结果为苔藓植物在极端环境地区的生态学功能研究提供了重要的科学依据。

The micromorphological structures of twelve species of moss plants were observed from the No. 1 glacier of the Tianshan Mountains by paraffin section and scanning electron microscopy （SEM）. Results indicated that the type, size, distribution, degree of dry cell wall depression, and morphology and distribution of surface cuticles and pores of the leaf cells, middle ribs, cell walls and cell surfaces were significantly different in different bryophyte species. These micromorphological characteristics not only have great significance in the species classification of moss plants, but also reflect the survival strategy of plant leaves for retaining water and resisting cold, wind and strong light irradiation in severe environments. This study can provide an important scientific basis for studies on the ecological functions of bryophytes in extreme environments.