14种荒漠植物茎的解剖结构特征分析

本文对分布于西鄂尔多斯-东阿拉善地区14种荒漠植物茎的解剖结构进行了观察和对比分析。结果表明:这14种荒漠植物都具有显著的旱生结构特征,突出表现在:(1)表皮都具角质层;(2)次生维管组织发达,且多具异常结构;(3)皮层细胞中普遍含叶绿体。说明荒漠植物可通过增加贮水的薄壁细胞、产生异常结构和在缩小叶面积的同时却在皮层细胞中发育叶绿体等多种途径来适应干旱少雨、风大沙多、光照强烈的荒漠环境。

Studies on the Anatomical Characteristics of the Stems of 14 Desert Plants

Anatomical characteristics of stems of 14 desert plants ,distributed from the west of Eerduosi to the east of Alashan,were studied.The results showed that the xeromorphic characteristics of 14 species was obvious:(1) There were cuticles on the epidermis;(2)Transmitting tissue was well developed;(3)There were large quantity of chloroplast in the cells of cortex.Thus it can be drawn that : the desert plants could decrease the water losing and improve photosynthesis by different means such as increasing parenchyma cell and forming abnormal structure.They have not only common characteristics in internal structure but also individual characteristics.