title: [Effects of PEG stress on flavonoids accumulation and related gene expression in suspension of Scutellaria baicalensis].
abstract: OBJECTIVE
  To study the effects of PEG stress on baicalin, baicalein accumulation induced by an increased concentration of PEG solution and the related genes' expression in suspension of Scutellaria baicalensis.
  
  
  METHODS
  The content of baicalin, baicalein in suspension of S. baicalensis was determined by HPLC. The related genes' expression was analyzed by semi-quantitative PCR.
  
  
  RESULTS
  The content of proline in suspension of S. baicalensis was promoted by PEG treatment. Ten percent PEG treatment promoted the expression of PAL and the content of baicalein in experimental material via a drought stress. 20% PEG solution treatment promoted the expression of UBGAT. At the same time, the increased activity of APX inhibited the progress of eliminating reactive oxygen by baicalein, which induced the transformation from baicalein to baicalin.
  
  
  CONCLUSIONS
  Active ingredient in suspension of S. baicalensis was promoted significantly via a stress of light concentration of PEG solution.
authors.affiliation: Institute of Chinese Materia Medica, China Academy of Chinese Medicinal Sciences, Beijing 100700, China.
authors.forename: Zhaochun
authors.initials: Z
authors.lastname: Yang
authors.forename: Yuan
authors.initials: Y
authors.lastname: Yuan
authors.forename: Min
authors.initials: M
authors.lastname: Chen
authors.forename: Lingfei
authors.initials: L
authors.lastname: Shuai
authors.forename: Qian
authors.initials: Q
authors.lastname: Xiao
authors.forename: Shufang
authors.initials: S
authors.lastname: Lin
mesh_terms: D005419:Flavonoids / Q000378:metabolism*; D015870:Gene Expression; D011092:Polyethylene Glycols / Q000494:pharmacology*; D031364:Scutellaria baicalensis / Q000187:drug effects / Q000378:metabolism*; D013535:Suspensions
chemical_list: D005419:Flavonoids; D013535:Suspensions; D011092:Polyethylene Glycols