title: [Dynamic change of active component content in different parts of Prunella vulgaris].
abstract: OBJECTIVE
  Through determination of the dynamic change of the active component in different parts of Prunella vulgaris at different growth stages, to find the optimal harvest time.
  
  
  METHODS
  Total flavonoids content was determined by using the spectrophotometric method, and the content of ursolic acid and oleanolic acid was determined by HPLC. The contents of ash and extract were determined according to the methods in Chinese Pharmacopeia (2005 edition).
  
  
  RESULTS
  There existed the active components in all parts of P. vulgaris, but the active component contents in different parts of P. vulgaris of at different growth stages, changed very obviously.
  
  
  CONCLUSIONS
  In Yangtze-Huaihai region, the optimal harvest time of Prunella spike best harvest is at the end of June, and Prunellastem at the end of May. All parts of P. vulgaris have medicinal value.
authors.affiliation: Institute of Chinese Medicinal Materials, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Yuxia
authors.initials: Y
authors.lastname: Wang
authors.forename: Jinbao
authors.initials: J
authors.lastname: Yin
authors.forename: Qiaosheng
authors.initials: Q
authors.lastname: Guo
authors.forename: Yunhua
authors.initials: Y
authors.lastname: Xiao
mesh_terms: D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000032:analysis; D009828:Oleanolic Acid / Q000032:analysis; D031347:Prunella / Q000737:chemistry*; D014315:Triterpenes / Q000032:analysis; D000097245:Ursolic Acid
chemical_list: D005419:Flavonoids; D009828:Oleanolic Acid; D014315:Triterpenes; D000097245:Ursolic Acid