title: [Effect of water stress on content of four organic acids in different cultivated populations of Isatis indigotica].
abstract: OBJECTIVE
  To study the different and the variety of four organic acids in leaves of Isatis indigotica among different cultivated populations in water stress condition and healthy plant.
  
  
  METHODS
  Four kinds of organic acids, such as oxalic acid, malic acid, ascorbic acid and citric acid from the leaves, were detected by HPLC.
  
  
  RESULTS
  Significant differences of four organic acids in the leaves of Beijing, Mongolia, Hebei and Shanxi cultivated populations. Compared with the healthy plant, the content of oxalic acid, malic acid and citric acid in water stress were increased, while the content of ascorbic acid was decreased.
  
  
  CONCLUSIONS
  Contents of four organic acids can act as the guideline factor in I. indigotica because they were related with the water stress condition.
authors.affiliation: College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. chenxuan@njau.edu.cn
authors.forename: Xuan
authors.initials: X
authors.lastname: Chen
authors.forename: Jiale
authors.initials: J
authors.lastname: Zhou
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Tang
authors.forename: Kangcai
authors.initials: K
authors.lastname: Wang
mesh_terms: D001205:Ascorbic Acid / Q000737:chemistry / Q000378:metabolism; D002681:China; D002851:Chromatography, High Pressure Liquid; D019343:Citric Acid / Q000737:chemistry / Q000378:metabolism; D003681:Dehydration; D031219:Isatis / Q000737:chemistry* / Q000378:metabolism*; D008293:Malates / Q000737:chemistry / Q000378:metabolism; D019815:Oxalic Acid / Q000737:chemistry / Q000378:metabolism; D018515:Plant Leaves / Q000737:chemistry / Q000378:metabolism*
chemical_list: D008293:Malates; D019343:Citric Acid; C030298:malic acid; D019815:Oxalic Acid; D001205:Ascorbic Acid