The Development and Histochemistry of Vegetative Organs in Sophora alopecuroides L.

The structure,development and histochemistry of vegetative organs in Sophora alopecuroides L.were studied by paraffin sectioning and the methods of histochemistry.The primary growths of the root,stem,rhizome and leaf are similar to the general developmental pattern of the dicotyledonous plants.While,during their secondary growth,part of the vascular cambium forms parenchyma cells only by periclinal divisions,so the secondary vascular tissue is divided into bundles.There are some differences in structure between stem and rhizome.The leaf is typical bifacial leaf.In the stem,rhizome and main vein of the leaf,the fiber bundles around the primary phloem are derived from procambium cells exterior to the protophloem.The results of histochemistry showed that the alkaloid is mainly contained in the parenchyma cells of the root,stem,rhizome and leaf.