陕西黄土高原34种豆科植物根瘤的比较形态解剖学研究  

Comparative Anatomy on the Root Nodules of 34 Leguminous Plants Grown on the Shaanxi Flora Loess-Plateaus

作　　者：何一[1] 蔡霞[1] 王卫卫[1] 

机构地区：[1]西北大学生命科学学院,陕西西安710069

出　　处：《陕西教育学院学报》2003年第2期88-92,共5页Journal of Shaanxi Institute of Education

基　　金：西北大学科学研究基金资助项目(00NW46);陕西省自然科学基金资助项目(2002C.13).

摘　　要：通过对生长在陕西黄土高原的豆科21属34种植物根瘤的形态结构观察研究表明,其根瘤生长在主根和侧根上或者仅生在侧根上,外表白色、粉红色或浅棕色,呈圆形、长圆形或扇形,多不分叉,少数分枝。其根瘤结构都由4部分组成,由外向内依次为:保护层、皮层、鞘细胞层和中心组织(侵染组织)。据统计,不同种植物的根瘤中上述各部分细胞的层数不同,其中,中心组织内侵染细胞所占的百分比在种间也存在差异。研究结果为这些植物的分类和开发利用提供了一定的依据。Comparative anatomy on root nodules of 34 leguminous plants grown on the Flora LoessPlateaus was studied by methods of paraffinsectioning. The 34 root nodules grew from main roots and lateral roots or only lateral roots. Round, long round or scalloped root nodules are white, or pink. Some root nodules branched. All the nodules are composed of four parts, ectoentad they are:the protect layers, cortex, sheath cell layers and center tissue(tissue infected). The results of statistics showed the cell layer numbers of the four parts were different in different root nodules. There were no positive correlation between the percentage of tissue infected and percentage of center tissue.

关 键 词：陕西黄土高原 豆科植物 根瘤 根瘤菌 形态结构 比较解剖学 

分 类 号：Q949.751.9[生物学—植物学] Q944