摘要
对生长在不同海拔地区的珠芽蓼、扁蓄、车前、鹅绒委陵菜、蒲公英和藜等六种植物叶片内部结构进行比较解剖学研究的结果表明：随着海拔高度由低到高的增加，植物叶片内部结构亦发生变化。主要表现在：（１）有些植物的叶片随着海高度的增加逐渐加厚．栅栏组织细胞层数的增多；（２）有些植物的叶随着海拔高度的增加叶肉细胞间隙加大．形成发达的通气组织；（３）有的植物在叶表皮上的角质层随着海拔高度的增加而加厚．柔毛增多．表皮细胞中出现可着色的内含物等；（４）这几种植物在高海拔处生长时均为异面叶．其中有些异而叶是由低海拔处的等面叶发展变化形成的。植物叶片结构上的这些特征及其变化与环境条件的变化是相一致的，是环境选择植物，植物适应环境的结果。
The anatomical structures of leaf laminae of six species of plants, Polygon urn viviporum L,Polygonum aviculare L,Plantogoasiatica L, Potentillaanserinia L, Taraxacum mongolicum Hand-Mazz and Chenopodium album L,growing indifferent area where the altitude is various were comparatively studied.The results showed that the structures of leaf laminae of these plants changed obviously as the altitude is varied from lower level to higher level. The changes of the structural characteristics along the altitude variation were mainly shown in several aspects as follOwing:1)the layers of palisade parenchyma of some plants'leaf laminae were multiplied;2)the internal surface area of the leaf of some plants increased greatly,forming the air chambers;3)the cuticle outside of the epidermal cells of some plants became thicker, the trichomes on leaf surfaces of some plants increased and the easy-staining substances appeared in the epidermal cells of some other plants;4) in all of these plants, the mesophyll consisted of two types of parenchyma cellspalisade parenchyma and sPOngy parenchyma when they were growing at higher altitude whatever parenchyma tile mesophyll comprised when they were growing at lower altitude.We think that the structural characteristics of the leaf laminae of these plants are uniform with the habitat in which the plants we.re growing and that it is the result that plants adapt to the environment and that the nature selects the plants.
出处
《青海师范大学学报（自然科学版）》
1995年第4期34-40,共7页
Journal of Qinghai Normal University(Natural Science Edition)
基金
国家自然科学基金
关键词
海拔高度
植物叶片
内部结构
altitude
plants leaf lamina
structural characteristics
