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采用植物组织培养、解剖学及组织化学定位方法研究太子参试管微块根发育的形态结构与营养物质积累特征的结果表明:太子参微块根由组培苗膨大的腋芽基部长出的不定根发育而成,经历了初生结构与次生结构发育,其膨大加粗是由于不定根的次生生长。维管形成层向内形成大量的次生木质部构成微块根的主要部分。淀粉粒是太子参微块根的主要营养存储方式。随着微块根的次生生长,淀粉粒先在次生木质部薄壁细胞中形成,随后在次生韧皮薄壁细胞中也大量积累。膨大的微块根可以合成太子参皂苷,成熟微块根中次生韧皮部的皂苷含量略高于次生木质部。离体太子参微块根的生长发育和营养物质的积累与块根中的相同。
Tissue culture, anatomy and histochemical methods were used to study the morphological structure and nutrient accumulation characteristics of Microtus oeconomus in vitro. The results showed that the microspore root of Pseudostellaria heterophylla , Experienced the development of primary structure and secondary structure, its enlargement and boldness is due to adventitious root secondary growth. The vascular cambium forms a large number of secondary xylem sections that form the major part of the microtuber root. Starch grains are the main nutrient storage mode of Pseudostellaria heterophylla. With the secondary growth of microtuber, starch grains were first formed in the secondary xylem parenchyma cells and subsequently accumulated in secondary phloem parenchyma cells. The enlarged micro-root can synthesize heterophylla ginseng, the content of saponin in the secondary phloem in the mature micro-tubercle is slightly higher than that in the secondary xylem. The growth and development of nutrient-rich micro-roots in vitro and the accumulation of nutrients are the same in root tuber.