title: [The dynamic change of total alkaloids content from Pinellia ternate].
abstract: OBJECTIVE
  To determine the alkaloids content of Pinellia ternate in different growing time for finding out the best harvest time.
  
  
  METHODS
  The alkaloid was extracted by chloroform from Pinellia ternate and tested at 417 nm with the spectroscopy by acid dye. The result was analyzed in One-Way ANOVA.
  
  
  RESULTS
  The calibration curve of alkaloid was linear( r = 0.9989). The recovery rate was perfect (100.1%). The alkaloids content in different growing time had very significant difference ( F = 12.789, P < 0.01).
  
  
  CONCLUSIONS
  This method is simple and quick. The alkaloids content in whole seedling stage is higher than that in other growing stages, while the mean total alkaloids output per plant is the highest in intensive seedling-downfallen stage which is considered as the best harvest time.
authors.affiliation: Department of Biology, West China Normal University, Nanchong 637000.
authors.forename: Jianhong
authors.initials: J
authors.lastname: Zeng
authors.forename: Zhengsong
authors.initials: Z
authors.lastname: Peng
authors.forename: Jingyuan
authors.initials: J
authors.lastname: Song
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Ma
authors.forename: Shuhong
authors.initials: S
authors.lastname: Wei
authors.forename: Yongcheng
authors.initials: Y
authors.lastname: Luo
mesh_terms: D000470:Alkaloids / Q000032:analysis*; D000704:Analysis of Variance; D003124:Colorimetry / Q000379:methods; D004396:Coloring Agents; D030021:Pinellia / Q000737:chemistry* / Q000254:growth & development; D035281:Plant Tubers / Q000737:chemistry / Q000254:growth & development; D010946:Plants, Medicinal / Q000737:chemistry* / Q000254:growth & development; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013997:Time Factors
chemical_list: D000470:Alkaloids; D004396:Coloring Agents