摘要
采用树脂切片法,用光学显微镜和电子显微镜观察了土培和水培吊兰(Chlorophytum comosum)的根系结构。结果表明:(1)在形态上,水培吊兰根系生长速度慢,直径较小,侧根数较少,根毛退化;(2)在显微结构上,水培吊兰根冠部位几乎无含晶细胞,淀粉体较少,根的成熟区域皮层细胞、含晶细胞较少,内皮层较厚,髓部占中柱面积较小;(3)在超微结构上,土培吊兰根内可见较多的粗糙型内质网、线粒体、胞饮处等,而水培吊兰根中质体会转变为叶绿体;(4)吊兰根中皮层部位存在体积较大的含晶细胞,其发育过程具有一定的规律。
The roots of Chlorophytum comosum under water culture were studied by optical and electron microscopy. This paper examined the structure of Chlorophytum comosum roots by the means of resin sections. The results are as follows： （ 1 ） Chlorophytum comosum roots under water cukure grew slowly, which were smaller in diameter in morphology. Lateral roots were fewer in number and root hair degenerated; （2） In microstructure, the root cap of the Chlorophytum comosum roots under water culture hardly had crystal cells, and the number of amyloplast was fewer. Cortical cells and crystal cells in mature region were fewer than those under soil culture. Thickness of cell in endodermis was thicker, and the area of the pith was less in the stele ; （3） In the uhrastructure, there were a few organelles, such as rough endoplasmic reticulum （RER）, mitochondria and endocytosis pits. In addition, plastids would turn out to be chloroplast in roots under water culture; （4） There were a few crystal cells of great volume in the cortex, and their development followed certain laws.
出处
《园艺学报》
CAS
CSCD
北大核心
2009年第4期533-538,共6页
Acta Horticulturae Sinica
基金
国家自然科学基金项目(30270795)
湖北省教育厅自然科学中青年基金项目(Q200727003)
关键词
吊兰
根
土培
水培
超微结构
Chlorophytum comosum
root
soil culture
water culture
uhrastructure
