title: [Comparison of volatile oils of cultivated Houttaynia cordata populations with wild].
abstract: OBJECTIVE
  To provide scientific proofs for the exploitation, utilization, and normalized cultivation of Houttuynia cordata.
  
  
  METHODS
  The underground parts of 17 wild H. cordata populations from different valleys and altitudes of mountain. Emei were transplanted to the same growth conditions. After one year's cultivation, volatile oil was obtained by steam distillation from the aerial part of the materials. The chemical constituents were separated and identified by GC-MS, and the relative content of each constituent was determined by area normalization.
  
  
  RESULTS
  Totally, 31 chemical components were identified, 19 components could be detected in all materials. The t-test results indicated that the contents of alpha-pinene and D-limonene were extremely significantly higher than that in the wild populations, and the contents of camphene and 2-undecanone were also significantly higher than that in the wild populations. And the reverse was found in the content of trans-beta-ocimene. All these 31 components could be divided into 9 chemical compositions, and 7 chemical compositions could be detected in the wild and cultivated. RSD values of 5 chemical compositions in wild populations were higher than that in the cultivated, except for the contents of diterpenyl alcohols and diterpenyl aldehydes. These five chemical compositions accounted for 84.05% and 90.12% of the whole volatile oils in the wild and cultivated conditions, respectively.
  
  
  CONCLUSIONS
  The components and contents of the volatile oils between wild and cultivated were different. The volatile oils polymorphism decrease distinctively as all the wild populations of H. cordata were transplanted to the uniform environmental conditions.
authors.affiliation: Agronomy College, Sichuan Agricultural University, Ya'an 625014, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Fu
authors.forename: Chunyan
authors.initials: C
authors.lastname: Huang
authors.forename: Renjian
authors.initials: R
authors.lastname: Liu
mesh_terms: D052859:Houttuynia / Q000737:chemistry* / Q000254:growth & development; D009822:Oils, Volatile / Q000032:analysis* / Q000737:chemistry; D009930:Organic Chemicals / Q000032:analysis
chemical_list: D009822:Oils, Volatile; D009930:Organic Chemicals