title: [Study on organogenesis and dry substance accumulation of Bupleurum Chinense].
abstract: OBJECTIVE
  To learn the development characteristics of Bupleurum chinese DC. and to provide the cultivation fundament.
  
  
  METHODS
  Plant samples of different growing periods were collected and investigated.
  
  
  RESULTS
  It was found that the development stages of B. chinense could be divided definitely into emergence of seedings, seedling, elongation of internode, flowering and fruiting, and dormancy. During its life, cotyledon, basal leaves and stem leaves appeared and died away in turn, and the stem extended to its full length in one month. The root reached its top length during seedling stage, and its diameter increased quickly from July to August. The dry substance accumulated in aerial part of the plant increased quickly, and that in root increased by 42.4%, 94.0%, or 40.1% respectively, from mid July to mid August after stem elongation beginning, from mid September to mid October, or from mid October to the date of harvesting.
  
  
  CONCLUSIONS
  Management methods and planting technologies of B. chinense should be mapped out according to the different characteristics of its three key growing stages.
authors.affiliation: Institute of Medicinal Plant, Chinese Academy of Medical Sciences, Chinese Peking Union Medical College, Beijing 100094.
authors.forename: Jianhe
authors.initials: J
authors.lastname: Wei
authors.forename: Huizhen
authors.initials: H
authors.lastname: Cheng
authors.forename: Kuntong
authors.initials: K
authors.lastname: Li
authors.forename: Wanglong
authors.initials: W
authors.lastname: Ding
authors.forename: Zhaoxi
authors.initials: Z
authors.lastname: Xu
authors.forename: Qinglong
authors.initials: Q
authors.lastname: Chu
mesh_terms: D029972:Bupleurum / Q000737:chemistry / Q000254:growth & development*; D004365:Drugs, Chinese Herbal / Q000378:metabolism; D018525:Germination; D010598:Pharmacognosy; D018515:Plant Leaves / Q000254:growth & development; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism; D018547:Plant Stems / Q000254:growth & development; D010946:Plants, Medicinal / Q000737:chemistry / Q000254:growth & development*; D012621:Seasons; D012639:Seeds / Q000254:growth & development
chemical_list: D004365:Drugs, Chinese Herbal