半边莲营养器官结构与生态环境的关系  

Relation between vegetative organ structure and ecotope of Lobelia chinensis

作　　者：柴瑞娟[1] 王玉良[2] 郑玉华[2] 康健[2] 

机构地区：[1]安徽工程科技学院生化系,安徽芜湖241000 [2]安徽科技学院生命科学学院,安徽凤阳233100

出　　处：《广西植物》2010年第2期177-180,208,共5页Guihaia

基　　金：国家重点基础研究发展规划项目(G1999043508);安徽工程科技学院青年教师科研项目(2008RZR004)~~

摘　　要：利用石蜡切片和光学显微镜,对半边莲的营养器官进行形态解剖学研究。结果表明:半边莲根和茎的次生结构不发达;地上茎表现为根的特征:茎皮层所占比例较大,茎中有明显的内皮层,内皮层上具凯氏带;根的皮层和茎的髓具通气组织,裂生型分泌道存在于茎的皮层;叶的气孔高于表皮,气孔只在上表皮有分布,叶尖具水孔。半边莲的形态结构特征表现出对水生生活的高度适应。对半边莲的系统位置也作了简单探讨。The vegetative organs of Lobelia chinensis was studied by the method of paraffin slice and light microscope.The results showed that L.chinensis had some morphological characteristics as follows：firstly,the secondary structure of stem and root of L.chinensis was underdeveloped.Secondly,the stem showed some characteristics which belong to root,such as,cortex took lager room of stem.Also,there were obvious casparian strip in endodermis.Thirdly,There were a great deal of ventilating tissue in root’s cortex and stem’s medulla,and there were schizogenous secretory cavity in cortex of stem.Moreover,there were some special characteristics of leaf,for example,stomas stood out of the epidermis and scattered on upper epidermis only.Besides,water pores distributed in the top of leaves.All the results confirmed the morphological and anatomical structure characteristics of L.chinensis showed a hige degree of adaption to aquatic surroundings.Finally,the systematic position about L.chinensis was discussed simply in this paper.

关 键 词：半边莲 石蜡切片 解剖结构 水生植物 生态环境 

分 类 号：Q944.53[生物学—植物学]