摘要
利用植物解剖学和组织化学的方法对北柴胡根、茎和叶中分泌道的分布、发生发育过程以及组织化学进行了研究。研究结果表明，分泌道分布在根中柱鞘组织和次生韧皮部、茎韧皮部和髓，以及叶脉韧皮部内和木质部上方。根中柱鞘中的分泌道来源于中柱鞘细胞，次生韧皮部中的分泌道来源于维管形成层切向分裂向外形成的衍生细胞；茎和叶脉韧皮部内的分泌道起源于原形成层束原生韧皮部外侧的2～3层细胞；茎髓中和叶脉木质部上方的分泌道来源于基本分生组织。这些分泌道腔隙的形成都属于裂生型。组织化学结果表明分泌道是挥发油积累的重要场所。
Distribution, development and histochemistry of secretory canals in roots, stems and leaves of Bupleurum chinense were studied, by using plant anatomy and histochemical methods. The secretory canals were distributed in the pericycle and secondary phloem of root,in the phloem and pith of stem, and in the phloem and above xylem of the vein in leaf. The secretory canal in root pericycle was developed from a group of pericycle cells. The secretory canals in root secondary phloem initiated from the outer derivative cells of the vascular cambium. The secretory canals presenting in phloem of stem and leaf originated from two or three exterior layers of protophloem cells in the procambium bundles. The secretory canals in the stem pith and above the leaf xylem were developed from ground meristem. The lumens of these secretory canals were formed by cell wall separation, i. e. , schizogenous. Histochemical tests showed that these secretory canals contained essential oils and were also important distribution sites.
出处
《武汉植物学研究》
CSCD
北大核心
2008年第4期329-336,共8页
Journal of Wuhan Botanical Research
基金
国家自然科学基金资助项目(30770122)
关键词
北柴胡
营养器官
分泌道
发育
挥发油
Bupleurum chinense
Vegetative organ
Secretory canal
Development
Essential oil
