title: [Effect of different light intensity on Polygonum cuspidatum callus].
abstract: OBJECTIVE
  To study the effect of light intensity (LI) on the callus induction and resveratrol content of Polygonum cuspidatum.
  
  
  METHODS
  Taking leaves and stem segment of P. cuspidatum as explants, the callus was inducted and cultured under different LI. The growth status of callus was observed and analyzed. The content of resveratrol was determined by HPLC.
  
  
  RESULTS
  The formation and growth of the stem segment callus were optimal under low light treatment (1340-1560 lx). The resveratrol content was 18.350 microg x g(-1) in fresh stem segment and 140.074 microg x g(-1) in dry stem segment, which was two times higher than that of wild P. cuspidatum.
  
  
  CONCLUSIONS
  Introduction and status of P. cuspidatum callus were obvious diverse under different LI, the resveratrol content of P. cuspidatum was enhanced under appropriate LI.
authors: Agronomy College, Sichuan Agricultural University, Ya' an 625014, China. wtlst@sicau.edu.cn
authors: Tao
authors: T
authors: Wen
authors: Li
authors: L
authors: Liang
authors: Yang
authors: Y
authors: Zeng
authors: Xiao
authors: X
authors: Yu
mesh_terms: D002851:Chromatography, High Pressure Liquid; D045468:Fallopia japonica / Q000737:chemistry / Q000254:growth & development / Q000528:radiation effects*; D008027:Light; D018515:Plant Leaves / Q000737:chemistry / Q000254:growth & development / Q000528:radiation effects; D018547:Plant Stems / Q000737:chemistry / Q000254:growth & development / Q000528:radiation effects; D010946:Plants, Medicinal / Q000737:chemistry / Q000254:growth & development / Q000528:radiation effects; D000077185:Resveratrol; D013267:Stilbenes / Q000032:analysis*; D046509:Tissue Culture Techniques / Q000379:methods
chemical_list: D013267:Stilbenes; D000077185:Resveratrol