尼泊尔马桑根瘤维管束形态发育研究

以生物制片和光学显微技术研究了尼泊尔马桑根瘤维管束的形态结构和发育特点。尼泊尔马桑根瘤维管束呈多重二叉分枝的树状结构,这是由根瘤顶端分生组织不断分裂形成的。它在基部与植物维管系统联成一体,在本质上是由植物侧根原基衍生而来。马桑根瘤维管束的这种形态结构和发育特点不同于豆科植物根瘤,也不同于杨梅属、木麻黄属等非豆科植物的根瘤。

THE STUDY ON MORPHOLOGICAL DEVELOPMENT OF NODULAR VASCULAR BUNDLES OF CORIARIA NEPALENSIS WALL.

Morphological structure and the development of nodular vascular bundles of Coriaria nepalensis Wall. were studied by microscopical techniques. The vascular bundles of nodules are poly-dichotomic resulting from poly-dichotomic bifurcation of apical meristem of the primary nodule. The tree-shaped structure of nodular vascular framework is connected with the vascular system of plant in the base, It was derived originally from the plant lateral root primordium.The characteristics of morphological structure and the development of nodular vascular bundles of Coriaria nepalensis Wall. are largely different from the nodules on legume, the nodules of Myrica, Casuarinacea and other actinorhizal plants.