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采用PEG和Epon 812二次包埋方法,利用光学显微镜和扫描电子显微镜对乌鲁木齐河源区海拔4000m、3400m、2500m三种不同高度的火绒草(Leontopodiumleontopodiodes(Willd.)Beauv.)叶片剖面及表面结构进行了观察.结果表明:火绒草叶片既具有中生植物又兼有旱生和湿生植物的部分结构特征;其叶片厚度、表皮细胞外壁角质层表面、外角质层蜡质分泌物的有无、表皮细胞形状、气孔器分布特征、保卫细胞极区“T”型角质加厚程度、气孔开口(长/宽)、气孔密度、维管束形态、CTR值、叶肉细胞叶绿体含量等性状特征,在不同海拔的火绒草间呈现出明显差异;而表皮的气孔水平位置类型、毛状附属器等性状则差异较小.数值分析火绒草叶结构各类性状以及不同性状状态的组合,显示出个体形态的多样性及其对高山环境和海拔高度的适宜性特征.
The leaf sections and surface structures of Leontopodium leontopodiodes (Willd.) Beauv. At three altitudes of 4000m, 3400m and 2500m above sea level in the headwaters of Urumqi were studied by light microscope and scanning electron microscope. The results showed that: the leaves of Eulaliopsis binata had both mesophytes and partial structural characteristics of both xerophytes and hygrophytes; the thickness of the leaves, the surface of the epidermal cell outer wall and the exudation of waxy exudates, The shape of epidermal cells, the distribution of stomatal apparatus, the thickness of keratin, the stomatal opening, the stomatal density, the shape of vascular bundle, the CTR value, the chloroplast content of mesophyll cells, There was a significant difference in the species of Elaeocarpus at different altitudes, while the type of stoma and the appearance of hairy adnexa in the epidermis were quite different.The numerical analysis of the traits of leaf of Elaeocarpus variegatus and the combination of different traits showed that individuals Morphological Diversity and Its Suitability to Alpine Environment and Altitude.