title: [The naphtha composing characteristics of geoherbs of Atractylodes lancea].
abstract: OBJECTIVE
  To find the chemical diversity and characteristics of A. lancea on two levels--individuals and populations, and to discover the chemical essentials for forming geoherbs.
  
  
  METHODS
  47 rhizomes of A. lancea were collected in 7 populations, and 6 naphtha components (1. elemol, 2. hinesol, 3. beta-eudesmol, 4. atractylone, 5. atractylodin, 6. atractylenolid I) in the rhizomes were determined by GC-MS combination. Principal Component Analysis and Cluster Analysis were carried out by SPSS.
  
  
  RESULTS
  Cluster Analysis of the 6 main components indicated that the chemical components of geoherbs were different from those of the non-geonerbs of A. lancea. Other analysis showed as follows: 1. The general oil of geoberbs were lower than that of non-geoherbs(P < 0.01), but components yielding more than 1% (% of the total oil) were more than non-geoherbs(P < 0.01); 2. Hinesol mixing beta-eudesmol was more in non-geoherbs, which atractylodin mixing atractylone was more in geoherbs(P < 0.001); 3. Principal Component Analysis implied that atractylone was the most important component to discriminate geoherbs and non-geoherbs of A. Lancea.
  
  
  CONCLUSIONS
  The naphtha composing characteristics of geoherbs was the special proportionment sale, viz. atractylone: hinesol: beta-eudesmol: atractylodin being(0.70~2.00):(0.04~0.35):(0.09~0.40):1.
authors.affiliation: Institute of Chinese Materia Medica, Academy of Traditional Chinese Medicine, Beijing 100700, China.
authors.forename: Lan-ping
authors.initials: LP
authors.lastname: Guo
authors.forename: Jun-ying
authors.initials: JY
authors.lastname: Liu
authors.forename: Li
authors.initials: L
authors.lastname: Ji
authors.forename: Lu-qi
authors.initials: LQ
authors.lastname: Huang
mesh_terms: D031174:Atractylodes / Q000737:chemistry* / Q000145:classification; D017753:Ecosystem; D005663:Furans / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry; D009822:Oils, Volatile / Q000737:chemistry* / Q000302:isolation & purification; D010936:Plant Extracts / Q000032:analysis*; D010946:Plants, Medicinal / Q000737:chemistry* / Q000145:classification; D012717:Sesquiterpenes; D045787:Sesquiterpenes, Eudesmane; D013141:Spiro Compounds / Q000032:analysis; D013729:Terpenes / Q000032:analysis
chemical_list: D005663:Furans; D009822:Oils, Volatile; D010936:Plant Extracts; D012717:Sesquiterpenes; D045787:Sesquiterpenes, Eudesmane; D013141:Spiro Compounds; D013729:Terpenes; C065858:hinesol; C051082:beta-eudesmol; C106914:atractylodin