title: [Effects of plant growth regulator mepiquat chloride on content of active compounds in Scutellaria baicalensis].
abstract: OBJECTIVE
  To study the effect of plant growth regulator mepiquat chloride (DPC) on the growing development of plant and the content of active compounds in Scutellaria baicalensis.
  
  
  METHODS
  After spraying DPC during the seedling period, the length of taproot, fresh weight of root, diameter of taproot and the length of stem were measured. The contents of baicalin, baicalein and wogonin were determined by HPLC, respectively. Total flavonoids and scavenging DPPH were determined with ultraviolet spectrophotometry.
  
  
  RESULTS
  After spraying DPC, fresh weight of S. baicalensis root was significant increased, and root diameter was also increased. The contents of baicalin and total flavonoids were significantly increased and baicalein and wogonin were decreased remarkably. Compared with controls, scavenging activity of ethanol extracts on DPPH free radical was no significant changed after spraying DPC.
  
  
  CONCLUSIONS
  Plant growth regulator DPC could regulate the growth on the ground and underground effectively, and could enhance the content of flavonoids compounds of S. baicalensis.
authors: Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
authors: Guo-Qiang
authors: GQ
authors: Hu
authors: Xue-Wen
authors: XW
authors: Zhang
authors: Min-Hui
authors: MH
authors: Li
authors: Guo-Hu
authors: GH
authors: Song
authors: Yuan
authors: Y
authors: Yuan
authors: Shu-Fang
authors: SF
authors: Lin
authors: Zhi-Gang
authors: ZG
authors: Wu
mesh_terms: D002851:Chromatography, High Pressure Liquid; D010880:Piperidines / Q000494:pharmacology*; D010937:Plant Growth Regulators / Q000494:pharmacology*; D031364:Scutellaria baicalensis / Q000737:chemistry / Q000187:drug effects* / Q000254:growth & development
chemical_list: D010880:Piperidines; D010937:Plant Growth Regulators; C049449:mepiquat