典型草原退化群落恢复演替过程中大针茅组织细胞变化的研究  

Research on the tissue and cell change of Stipa grandis in the course of restoring succession of the typical steppe degraded community

作　　者：张韬[1] 刘佳慧[2] 王建琼[1] 都达古拉[1] 

机构地区：[1]内蒙古农业大学林学院 [2]内蒙古农业大学职业技术学院

出　　处：《干旱区资源与环境》2009年第10期164-170,共7页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金重点项目(No.30330120)资助

摘　　要：将显微照相和地理信息系统的理论与方法相结合,应用于组织解剖学中。通过对内蒙古锡林郭勒盟典型草原不同退化研究样地大针茅(Stipa grandis)营养器官茎和叶组织细胞变化的研究,揭示出草原植物小型化的内在机制。随着群落恢复演替的进程,三个群落样地中的大针茅植株的叶和茎的解剖结构呈现出相同的变化趋势,即恢复时间越长,其组成器官的细胞数目越多。从相反的过程来看,叶和茎都发生了小型化。然而,叶和茎的小型化机理又有不同。研究表明:(1)从叶片的解剖结构来看,叶脉数目的减少导致了小型化。(2)从茎的解剖结构来看,茎的各种组织细胞数目的减少导致了小型化。In this research we combined the theory and method of microscopic photography with geographic information system, to study the plant anatomical structure. Through the research of changing in the vegetative organs of Stipa grandis growing in different kinds of degraded typical grassland in Xilin Gol town of Inner Mongolia to reveal the internal mechanism of the prairie plant miniaturization. In the course of community restoring succession, the anatomic structure of Stipa grandis leaf and stem in three different sample plots demonstrate the same variation tendency, namely that as the restoring time is longer, the cell amount which makes up the organ of the leaf and stem is more. According to opposite course, miniaturization has taken place in the leaf and stem. However, there is the difference in the miniaturization mechanism of the leaf and stem. The research showed that ： （ 1 ） The reduction of the number of veins in leaf cause the miniaturization. （2） The miniaturization mechanism of the stem is the reduction of cell amount of the stem.

关 键 词：典型草原 退化群落 恢复演替 大针茅 组织细胞变化 方法 

分 类 号：Q942[生物学—植物学]