银线草营养器官结构及主要成分的组织化学定位

Morphological Structure of Vegetative Organs and Histochemical Localization in Chloranthus japonicus Sieb.

采用植物解剖学和组织化学定位方法研究银线草营养器官的显微结构和萜类、黄酮类化合物在营养器官中的分布规律。结果表明:银线草的根皮层细胞排列整齐,细胞间隙较小,韧皮部狭窄;茎皮层细胞也排列整齐,在韧皮部外方包围有多层束状纤维;叶为异面叶,栅栏组织和海绵组织分化明显,叶片上、下表皮均无毛被,气孔器多为不规则型。组织化学定位结果显示萜类和黄酮类化合物分布在根的皮层、茎的皮层和韧皮部细胞中。

Anatomical and histochemical methods were used to investigate the structure of vegetative organs,and terpenoids and flavonoids location in Chloranthus japonicus Sieb.The root cortex cells were arranged in order and had smaller intercellular spaces,and the root phloem was narrow.The stem cortex cells were also arranged in order,and the stem phloem was surrounded by strands of fiber.The leaves had the bifacial structure.The palisade tissue and sponge tissue were clearly differentiated.There were no hairs on the upper and lower epidermis of the leaf.The stomatal apparatuses fell into anomocytic type and occured only on the lower epidermis.The histochemistry results of terpenoids and flavonoids localization were similar in vegetative organs in C.japonicus,both of which were mainly distributed in the cortex of root,the cortex of stem and phloem cell.