远志根的结构发育与远志皂苷积累关系的研究(英文)

Relationship between Structural Development and Accumulation of Saponins in the Root of Polygala tenuifolia Willd

应用植物解剖学、组织化学定位及植物化学技术,研究了远志根不同发育时期的结构特征与远志皂苷积累的关系。结果表明：皂苷分布在远志根的薄壁组织细胞中,次生韧皮部是皂苷积累的主要场所。以远志皂苷元为评价指标来分析远志皂苷的积累动态,显示在4-10月的不同发育时期,4个不同生长年份根中远志皂苷元百分含量具有相同的变化趋势,并且均表现为：1年生根〉2年生根〉3年生根〉4年生根,表明远志皂苷在幼嫩的植株根中含量高;从年平均增长率来看,根的长度、直径、次生韧皮部的厚度及根干重的增长均在药材种植第2-3年增加最快。兼顾药材产量和质量,应该在远志种植第三年的果后期进行采收比较适宜。

We investigated the structural development of roots with their dynamic accumulation of saponins in Polygala tenuifolia by anatomical,histochemical and phytochemical approaches. The saponins were distributed in the root parenchyma,and the secondary phloem was the main storage region of saponins. We took senegenin as an evaluation index to analyze the regularity of saponins accumulation. During the growth period from April to October,the percentage of senegenin content of roots in different years had dynamic variant trend,the senegenin percent content had the similar result,and the order was annual roots biennial roots triennial roots quadrennial roots showing that the younger root had higher content. The length,diameter,thickness of the＂skin areas＂and dry weight as well as the total senegenin content of roots increased most quickly from the second to the third growth year. Considering the yield and the quality,the middle ten days of August in the third growing year was optimal collecting period for the drug of P. tenuifolia.