【摘要】 <正> 桔梗既是一种资源植物;又为常用中药,可宣肺祛痰、利咽排脓;并供作菜肴,别具风味,颇受欢迎。不论药用或食用,多年来皆依靠采挖野生资源。近年来,由于荒原减少,再加上只采不育,野生资源日益枯竭,既使过去每年调出量很大的黑龙江省亦感紧缺！为此,我们自1981年以来,对桔梗的生物学进行了一些研究,希望对保护和发展这一资源,乃至引种栽培提供理论依据。更多还原

【Abstract】 The integrated characters of Platycodon grandiflorum (Jacq.)A. DC. have been studied in this paper. It is concerned withmorphology, anatomy and cytology; and with some respects ofbiology especially. There are no distinct differences about morphology andanatomy among different populations. The xylem and phloemform a continuous cylinder. The vessel segments in the stem arescalariform perforations and in the root simple perforations.There are 5--6 colpates in the pollen grain. The chromosomesof the somatic cell are 18.×=9. All of these characters arecommon in different populations and considered as primitive. Polymorphism of flower color, the blue type and white type,which is correlated with the contents of the saponin exists inpopulations. The life-span of the seeds stored at low tempera-ture (0°-4℃) can be prolonged to 2 years, but generally, itis only 1 year. The rhythum of the growth and development of Platycodon rgandiflorum from Zhejiang province is differentfrom which in Heilungjiang province. When the seeds come fromZhejiang and grow in Harbin, their growth period is longer andthe product of their roots is better than the native ones. In this case, it is evident that the research of plant bio-logy, as shown in this paper, has not only theoratical value butalso practical value.更多还原