乌拉尔甘草根的结构与皂苷类成分积累关系研究

应用植物解剖学、组织化学定位和植物化学方法,对不同发育阶段的乌拉尔甘草根中的皂苷类成分的积累变化规律进行了研究,为进一步揭示甘草药材质量形成的内在机制并指导优质甘草栽培提供理论依据.结果表明:(1)乌拉尔甘草中皂苷类成分主要存在于根的韧皮薄壁细胞和射线细胞中,韧皮部中皂苷含量高于木质部和根皮,而且根的次生生长与皂苷类成分的积累具有一定的相关性.(2)不同生长年限的乌拉尔甘草根中的总皂苷含量存在差异,3年生甘草根中总皂苷含量高于2年生和1年生甘草根.

Relationship between Anatomic Structures and Accumulation of Saponins in Radix of Glycyrrhiza uralensis Fisch.

The roots development and accumulation of saponins of a medicinal licorice Glycyrrhiza uralensis Fisch.were investigated by means of anatomic,histochemical and chemical analysis methods.The results showed that:(1)Saponins distributed mainly in the phloem parenchyma cells and ray cells of the roots.The content of total saponins in different tissues of taproot was varied.The highest one was in phloem,while the lowest in the root bark,between them was in xylem.(2)The accumulation of saponins was significantly increased with the roots growing ages.The content of total saponins in 3-years roots was the highest.The results suggested that the accumulation of saponins in G.uralensis taproot was positively correlated with root secondary growth.It is like to provide a further understanding on the internal mechanism of the quality formation of medicinal licorice,and to improve the cultivation of medicinal licorice.