鸭跖草的显微鉴别研究

Microscopic Identification of Commelina communis

目的对鸭跖草药材的微观组织形态进行研究,为鸭趾草的显微鉴别提供依据。方法对药材徒手切片并进行显微制片,利用光学显微镜对其进行微观特征观察,并拍摄图片。结果鸭跖草茎横切面表皮细胞一列,偶尔可见非腺毛,内侧有3~4层厚角组织,维管束纤维连续排列成环,维管束间断排列,茎中部薄壁组织中还具散在维管束。叶横切面上下表皮细胞大小不一,维管束鞘细胞两层,栅状细胞一列,上下表面可见两种类型的非腺毛,叶肉细胞含草酸钙针晶、棱晶、方晶。总苞片表面密被短硬毛。结论本研究结果鸭跖草显微特征进行了补充,为鸭跖草药材的相关鉴别标准提供了参考。

Objective To investigate the microscopic histomorphology of the medicinal material Commelina communis,and to provide a reference for the microscopic identification of Commelina communis.Methods Freehand sectioning and microscopic slide preparation were performed for the medicinal material,and a light microscope was used to observe its microscopic characteristics and take photos.Results The epidermal cells on the cross section of the stem of Commelina communis were arranged in a row,with non-glandular hairs occasionally and 3-4 layers of collenchyma tissue on the medial side;vascular bundle fibers were arranged in a ring,and vascular bundles were arranged intermittently,with scattered vascular bundles in the parenchyma of the middle stem.The upper and lower epidermal cells in the cross section of the leaf had different sizes,and there are two layers of bundle sheath cells and a row of palisade cells;two types of non-glandular hairs were observed on the upper and lower surfaces of the leaf,and the mesophyll cells contained the needle crystal,prismatic crystal,and square crystal of calcium oxalate.The surface of the involucre was densely covered with short bristles.Conclusion The results of this study supplement the microscopic characteristics of Commelina communis and provides a reference for the identification criteria for Commelina communis.