鄂尔多斯高原锦鸡儿属植物叶的解剖结构及其生态适应性  

Leaf Anatomical Structures and Ecological Adaptabilities of 8Caragana Specieson Ordos Plateau

作　　者：杨九艳[1] 杨劼[1] 杨明博[1] 孔维雪[2] 梁娜[2] 

机构地区：[1]内蒙古大学生命科学学院,呼和浩特010021 [2]内蒙古医学院,呼和浩特010059

出　　处：《干旱区资源与环境》2005年第3期175-179,共5页Journal of Arid Land Resources and Environment

基　　金：国家重点基础研究发展规划项目"草地与农牧交错带生态系统重建机理及优化生态 -生产范式";项目编号G2000018604

摘　　要：本文对分布在鄂尔多斯高原不同地带上的8种锦鸡儿属植物的叶片进行了解剖学观察和研究。结果表明,随着从东到西环境干旱程度的增加,锦鸡儿属植物叶肉组织分化出现从两面叶→过渡型→环栅型→全栅型的适应趋势。8种锦鸡儿的旱生结构有:较厚的角质层、表皮细胞含有晶体、连续或不连续的下皮层、细胞中含有鞣质等内含物、发达的栅栏组织、发达的叶脉及机械组织。不同的种采取了各自的适应对策。Anatomical structures of leaf of the 8 species of Caraganagenus on the Ordos Plateau were observed.The results showed that the differentiation trend of mesophyll tissue was bifacial leaf→transitional form→ring-palisade→total-palisade as the environment was getting drier form east to west. It is a ecological adaptation. The xeromorphic structures of the 8 species of Caragana genus were thicker cuticle\,continuous or notcontinuous hypodermis and epidermal cells containing tannin or crystals,developed palisade tissue\, vein and mechanical tissue.Each species had its own adaptable strategies.

关 键 词：鄂尔多斯高原 锦鸡儿属 生态适应性 灌木丛 植物 

分 类 号：Q949.751.9[生物学—植物学]