六盘山鸡爪大黄茎和叶多糖贮藏分布特征的研究  

The Localization Characteristics of Rhubarb Polysaccharide in Stems and Leaves of Rheum tanguticum Maxim.et Balf.var.liupanshanense Cheng et kao

作　　者：章英才[1] 李俐[1] 

机构地区：[1]宁夏大学生命科学学院,银川750021

出　　处：《植物研究》2009年第6期753-756,共4页Bulletin of Botanical Research

基　　金：宁夏自然科学基金资助项目(NZ0812)

摘　　要：采用组织化学方法研究了六盘山鸡爪大黄茎和叶中大黄多糖贮藏和分布的特征。结果表明:大黄多糖在茎和叶内的贮藏部位各有特点,在茎中主要分布于皮层、维管束中韧皮部和木质部的薄壁细胞、髓射线和髓,随着茎的成熟大黄多糖有一定程度的增加;叶表皮、叶肉和叶脉中不同程度地分布着较少量的多糖;叶柄维管束外围的基本组织细胞中不同程度地分布着一定数量的大黄多糖,而维管束中分布较少。茎和叶中大黄多糖的贮藏和分布总体较少。The storage and distribution laws of rhubarb polysaccharide in the stems and leaves of Rheum tanguticum Maxim. et Balf. var. liupanshanense Cheng et kao were studied by histochemical methods. The results showed that the distribution of rhubarb polysaccharide in stems and leaves was diverse. Rhubarb polysaccharide of the stems existed in the cortex, xylem parenchyma, phloem parenchyma of vascular bundle, pith ray and pith. With the gradual maturity of the stems, the content of rhubarb polysaccharide increased to certain degree. The epidermis, mesophyll tissue and vein of leaves accumulated a small amount of rhubarb polysaccharide. The ground tissue outside the bundle of petiole accumulated a small amount of rhubarb polysaccharide. In general, the distribution of rhubarb polysaccharide in stems and leaves was deficient.

关 键 词：六盘山鸡爪大黄 茎和叶 大黄多糖 分布规律 

分 类 号：Q944.62[生物学—植物学]